diff --git a/autoload/ale/path.vim b/autoload/ale/path.vim
index b0f4dca..16dabf2 100644
--- a/autoload/ale/path.vim
+++ b/autoload/ale/path.vim
@@ -17,23 +17,6 @@ function! ale#path#Simplify(path) abort
     return substitute(simplify(l:win_path), '^\\\+', '\', 'g') " no-custom-checks
 endfunction
 
-" This function is mainly used for testing.
-"
-" If an additional 'add_drive' argument is given, the current drive letter
-" will be prefixed to any absolute paths on Windows.
-function! ale#path#Winify(path, ...) abort
-    let l:new_path = ale#path#Simplify(a:path)
-
-    if has('win32')
-        " Add a drive letter to \foo\bar paths, if needed.
-        if a:0 && a:1 is# 'add_drive' && l:new_path[:0] is# '\'
-            let l:new_path = fnamemodify('.', ':p')[:1] . l:new_path
-        endif
-    endif
-
-    return l:new_path
-endfunction
-
 " Given a buffer and a filename, find the nearest file by searching upwards
 " through the paths relative to the given buffer.
 function! ale#path#FindNearestFile(buffer, filename) abort
diff --git a/autoload/ale/test.vim b/autoload/ale/test.vim
index 8fc4fe4..bea10c5 100644
--- a/autoload/ale/test.vim
+++ b/autoload/ale/test.vim
@@ -50,5 +50,5 @@ function! ale#test#SetFilename(path) abort
     \   ? a:path
     \   : l:dir . '/' . a:path
 
-    silent! noautocmd execute 'file ' . fnameescape(ale#path#Winify(l:full_path))
+    silent! noautocmd execute 'file ' . fnameescape(ale#path#Simplify(l:full_path))
 endfunction
diff --git a/test/command_callback/test_brakeman_command_callback.vader b/test/command_callback/test_brakeman_command_callback.vader
index f98801b..1772c9d 100644
--- a/test/command_callback/test_brakeman_command_callback.vader
+++ b/test/command_callback/test_brakeman_command_callback.vader
@@ -25,7 +25,7 @@ Execute(The brakeman command callback should find a valid Rails app root):
 
   AssertEqual
   \ 'brakeman -f json -q  -p '
-  \ . ale#Escape(ale#path#Winify(g:dir . '/../ruby_fixtures/valid_rails_app')),
+  \ . ale#Escape(ale#path#Simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
   \ ale_linters#ruby#brakeman#GetCommand(bufnr(''))
 
 Execute(The brakeman command callback should include configured options):
@@ -35,5 +35,5 @@ Execute(The brakeman command callback should include configured options):
 
   AssertEqual
   \ 'brakeman -f json -q --combobulate -p '
-  \ . ale#Escape(ale#path#Winify(g:dir . '/../ruby_fixtures/valid_rails_app')),
+  \ . ale#Escape(ale#path#Simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
   \ ale_linters#ruby#brakeman#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_c_cppcheck_command_callbacks.vader b/test/command_callback/test_c_cppcheck_command_callbacks.vader
index e6fe1b7..1643e3e 100644
--- a/test/command_callback/test_c_cppcheck_command_callbacks.vader
+++ b/test/command_callback/test_c_cppcheck_command_callbacks.vader
@@ -43,7 +43,7 @@ Execute(cppcheck for C++ should detect compile_commands.json files):
   call ale#test#SetFilename('cppcheck_paths/one/foo.cpp')
 
   AssertEqual
-  \ 'cd ' . ale#Escape(ale#path#Winify(g:dir . '/cppcheck_paths/one')) . ' && '
+  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/cppcheck_paths/one')) . ' && '
   \   . ale#Escape('cppcheck')
   \   . ' -q --language=c --project=compile_commands.json --enable=style %t',
   \ ale_linters#c#cppcheck#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_cpp_cppcheck_command_callbacks.vader b/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
index f7b37d4..2c9d729 100644
--- a/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
+++ b/test/command_callback/test_cpp_cppcheck_command_callbacks.vader
@@ -43,7 +43,7 @@ Execute(cppcheck for C++ should detect compile_commands.json files):
   call ale#test#SetFilename('cppcheck_paths/one/foo.cpp')
 
   AssertEqual
-  \ 'cd ' . ale#Escape(ale#path#Winify(g:dir . '/cppcheck_paths/one')) . ' && '
+  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/cppcheck_paths/one')) . ' && '
   \   . ale#Escape('cppcheck')
   \   . ' -q --language=c++ --project=compile_commands.json --enable=style %t',
   \ ale_linters#cpp#cppcheck#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_dartanalyzer_command_callback.vader b/test/command_callback/test_dartanalyzer_command_callback.vader
index 6685ab4..c7b5139 100644
--- a/test/command_callback/test_dartanalyzer_command_callback.vader
+++ b/test/command_callback/test_dartanalyzer_command_callback.vader
@@ -35,6 +35,6 @@ Execute(The .packages file should be set if detected):
 
   AssertEqual
   \ ale#Escape('dartanalyzer')
-  \   . ' --packages ' . ale#Escape(ale#path#Winify(g:dir . '/dart_paths/.packages'))
+  \   . ' --packages ' . ale#Escape(ale#path#Simplify(g:dir . '/dart_paths/.packages'))
   \   . ' %s',
   \ ale_linters#dart#dartanalyzer#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_flake8_command_callback.vader b/test/command_callback/test_flake8_command_callback.vader
index 8cb4ded..1784b81 100644
--- a/test/command_callback/test_flake8_command_callback.vader
+++ b/test/command_callback/test_flake8_command_callback.vader
@@ -76,7 +76,7 @@ Execute(You should be able to set a custom executable and it should be escaped):
 Execute(The flake8 callbacks should detect virtualenv directories):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \ g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/flake8'
   \)
 
@@ -95,35 +95,35 @@ Execute(The FindProjectRoot should detect the project root directory for namespa
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_manifest/namespace/foo/bar.py')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/python_paths/namespace_package_manifest'),
+  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_manifest'),
   \ ale#python#FindProjectRoot(bufnr(''))
 
 Execute(The FindProjectRoot should detect the project root directory for namespace package via setup.cf):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_setup/namespace/foo/bar.py')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/python_paths/namespace_package_setup'),
+  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_setup'),
   \ ale#python#FindProjectRoot(bufnr(''))
 
 Execute(The FindProjectRoot should detect the project root directory for namespace package via pytest.ini):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_pytest/namespace/foo/bar.py')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/python_paths/namespace_package_pytest'),
+  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_pytest'),
   \ ale#python#FindProjectRoot(bufnr(''))
 
 Execute(The FindProjectRoot should detect the project root directory for namespace package via tox.ini):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/namespace_package_tox/namespace/foo/bar.py')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/python_paths/namespace_package_tox'),
+  \ ale#path#Simplify(g:dir . '/python_paths/namespace_package_tox'),
   \ ale#python#FindProjectRoot(bufnr(''))
 
 Execute(The FindProjectRoot should detect the project root directory for non-namespace package):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/no_virtualenv/subdir/foo/bar.py')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/python_paths/no_virtualenv/subdir'),
+  \ ale#path#Simplify(g:dir . '/python_paths/no_virtualenv/subdir'),
   \ ale#python#FindProjectRoot(bufnr(''))
 
 " Some users currently run flake8 this way, so we should support it.
diff --git a/test/command_callback/test_haml_hamllint_command_callback.vader b/test/command_callback/test_haml_hamllint_command_callback.vader
index 68aa1e6..0d9b1e0 100644
--- a/test/command_callback/test_haml_hamllint_command_callback.vader
+++ b/test/command_callback/test_haml_hamllint_command_callback.vader
@@ -18,7 +18,7 @@ Execute(The default command should be correct):
 
 Execute(The command should have the .rubocop.yml prepended as an env var if one exists):
   call ale#test#SetFilename('../hamllint-test-files/rubocop-yml/subdir/file.haml')
-  let b:conf = ale#path#Winify(g:dir . '/../hamllint-test-files/rubocop-yml/.rubocop.yml')
+  let b:conf = ale#path#Simplify(g:dir . '/../hamllint-test-files/rubocop-yml/.rubocop.yml')
 
   if has('win32')
     " Windows uses 'set var=... && command'
@@ -38,7 +38,7 @@ Execute(The command should have the .rubocop.yml prepended as an env var if one
 
 Execute(The command should have the nearest .haml-lint.yml set as --config if it exists):
   call ale#test#SetFilename('../hamllint-test-files/haml-lint-yml/subdir/file.haml')
-  let b:conf = ale#path#Winify(g:dir . '/../hamllint-test-files/haml-lint-yml/.haml-lint.yml')
+  let b:conf = ale#path#Simplify(g:dir . '/../hamllint-test-files/haml-lint-yml/.haml-lint.yml')
 
   AssertEqual
   \ 'haml-lint --config '
@@ -48,8 +48,8 @@ Execute(The command should have the nearest .haml-lint.yml set as --config if it
 
 Execute(The command should include a .rubocop.yml and a .haml-lint if both are found):
   call ale#test#SetFilename('../hamllint-test-files/haml-lint-and-rubocop/subdir/file.haml')
-  let b:conf_hamllint = ale#path#Winify(g:dir . '/../hamllint-test-files/haml-lint-and-rubocop/.haml-lint.yml')
-  let b:conf_rubocop = ale#path#Winify(g:dir . '/../hamllint-test-files/haml-lint-and-rubocop/.rubocop.yml')
+  let b:conf_hamllint = ale#path#Simplify(g:dir . '/../hamllint-test-files/haml-lint-and-rubocop/.haml-lint.yml')
+  let b:conf_rubocop = ale#path#Simplify(g:dir . '/../hamllint-test-files/haml-lint-and-rubocop/.rubocop.yml')
 
   if has('win32')
     " Windows uses 'set var=... && command'
diff --git a/test/command_callback/test_javac_command_callback.vader b/test/command_callback/test_javac_command_callback.vader
index fe54530..7823d03 100644
--- a/test/command_callback/test_javac_command_callback.vader
+++ b/test/command_callback/test_javac_command_callback.vader
@@ -122,7 +122,7 @@ Execute(The javac callback should detect source directories):
   AssertEqual
   \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -sourcepath ' . ale#Escape(
-  \     ale#path#Winify(g:dir . '/java_paths/src/main/java/')
+  \     ale#path#Simplify(g:dir . '/java_paths/src/main/java/')
   \   )
   \   . ' -d TEMP %t',
   \ GetCommand([])
@@ -136,7 +136,7 @@ Execute(The javac callback should combine detected source directories and classp
   \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -cp ' . ale#Escape(join(['/foo/bar.jar', '/xyz/abc.jar'], g:cp_sep))
   \   . ' -sourcepath ' . ale#Escape(
-  \     ale#path#Winify(g:dir . '/java_paths/src/main/java/')
+  \     ale#path#Simplify(g:dir . '/java_paths/src/main/java/')
   \   )
   \   . ' -d TEMP %t',
   \ GetCommand([
@@ -166,8 +166,8 @@ Execute(The javac callback should include src/test/java for test paths):
   AssertEqual
   \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -sourcepath ' . ale#Escape(join([
-  \     ale#path#Winify(g:dir . '/java_paths/src/main/java/'),
-  \     ale#path#Winify(g:dir . '/java_paths/src/test/java/'),
+  \     ale#path#Simplify(g:dir . '/java_paths/src/main/java/'),
+  \     ale#path#Simplify(g:dir . '/java_paths/src/test/java/'),
   \   ], g:cp_sep))
   \   . ' -d TEMP %t',
   \ GetCommand([])
@@ -180,8 +180,8 @@ Execute(The javac callback should include src/main/jaxb when available):
   AssertEqual
   \ 'cd ' . ale#Escape(expand('%:p:h')) . ' && javac -Xlint'
   \   . ' -sourcepath ' . ale#Escape(join([
-  \     ale#path#Winify(g:dir . '/java_paths_with_jaxb/src/main/java/'),
-  \     ale#path#Winify(g:dir . '/java_paths_with_jaxb/src/main/jaxb/'),
+  \     ale#path#Simplify(g:dir . '/java_paths_with_jaxb/src/main/java/'),
+  \     ale#path#Simplify(g:dir . '/java_paths_with_jaxb/src/main/jaxb/'),
   \   ], g:cp_sep))
   \   . ' -d TEMP %t',
   \ GetCommand([])
diff --git a/test/command_callback/test_less_stylelint_command_callback.vader b/test/command_callback/test_less_stylelint_command_callback.vader
index d5aa3b9..a5912ec 100644
--- a/test/command_callback/test_less_stylelint_command_callback.vader
+++ b/test/command_callback/test_less_stylelint_command_callback.vader
@@ -30,7 +30,7 @@ After:
 Execute(node_modules directories should be discovered):
   call ale#test#SetFilename('stylelint_paths/nested/testfile.less')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \   g:dir
   \   . '/stylelint_paths/node_modules/.bin/stylelint'
   \)
diff --git a/test/command_callback/test_lessc_command_callback.vader b/test/command_callback/test_lessc_command_callback.vader
index 785c38c..ec2899d 100644
--- a/test/command_callback/test_lessc_command_callback.vader
+++ b/test/command_callback/test_lessc_command_callback.vader
@@ -30,7 +30,7 @@ After:
 Execute(node_modules directories should be discovered):
   call ale#test#SetFilename('lessc_paths/nested/testfile.less')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \   g:dir
   \   . '/lessc_paths/node_modules/.bin/lessc'
   \)
@@ -43,7 +43,7 @@ Execute(node_modules directories should be discovered):
   \ ale#Escape(b:executable)
   \   . ' --no-color --lint'
   \   . ' --include-path='
-  \     . ale#Escape(ale#path#Winify(g:dir . '/lessc_paths/nested'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/lessc_paths/nested'))
   \   . ' -',
   \ ale_linters#less#lessc#GetCommand(bufnr(''))
 
@@ -61,7 +61,7 @@ Execute(The global override should work):
   \ ale#Escape('foobar')
   \   . ' --no-color --lint'
   \   . ' --include-path='
-  \     . ale#Escape(ale#path#Winify(g:dir . '/lessc_paths/nested'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/lessc_paths/nested'))
   \   . ' -',
   \ ale_linters#less#lessc#GetCommand(bufnr(''))
 
@@ -76,7 +76,7 @@ Execute(Extra options should be configurable):
   \ ale#Escape('lessc')
   \   . ' --no-color --lint'
   \   . ' --include-path='
-  \     . ale#Escape(ale#path#Winify(g:dir))
+  \     . ale#Escape(ale#path#Simplify(g:dir))
   \   . ' --whatever'
   \   . ' -',
   \ ale_linters#less#lessc#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_mypy_command_callback.vader b/test/command_callback/test_mypy_command_callback.vader
index 4ccc008..6a0add5 100644
--- a/test/command_callback/test_mypy_command_callback.vader
+++ b/test/command_callback/test_mypy_command_callback.vader
@@ -61,7 +61,7 @@ Execute(The mypy command should switch directories to the detected project root)
   \ 'mypy',
   \ ale_linters#python#mypy#GetExecutable(bufnr(''))
   AssertEqual
-  \ 'cd ' . ale#Escape(ale#path#Winify(g:dir . '/python_paths/no_virtualenv/subdir'))
+  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/python_paths/no_virtualenv/subdir'))
   \   . ' && ' . ale#Escape('mypy')
   \   . ' --show-column-numbers  '
   \   . '--shadow-file %s %t %s',
@@ -70,13 +70,13 @@ Execute(The mypy command should switch directories to the detected project root)
 Execute(The mypy callbacks should detect virtualenv directories and switch to the project root):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
 
-  let b:executable = ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/mypy')
+  let b:executable = ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/mypy')
 
   AssertEqual
   \ b:executable,
   \ ale_linters#python#mypy#GetExecutable(bufnr(''))
   AssertEqual
-  \   'cd ' . ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/subdir'))
+  \   'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/subdir'))
   \   . ' && ' . ale#Escape(b:executable)
   \   . ' --show-column-numbers  '
   \   . '--shadow-file %s %t %s',
@@ -90,7 +90,7 @@ Execute(You should able able to use the global mypy instead):
   \ 'mypy',
   \ ale_linters#python#mypy#GetExecutable(bufnr(''))
   AssertEqual
-  \   'cd ' . ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/subdir'))
+  \   'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/subdir'))
   \   . ' && ' . ale#Escape('mypy')
   \   . ' --show-column-numbers  '
   \   . '--shadow-file %s %t %s',
diff --git a/test/command_callback/test_ocaml_ols_callbacks.vader b/test/command_callback/test_ocaml_ols_callbacks.vader
index 2c44dbc..d10898f 100644
--- a/test/command_callback/test_ocaml_ols_callbacks.vader
+++ b/test/command_callback/test_ocaml_ols_callbacks.vader
@@ -32,14 +32,14 @@ Execute(The project root should be detected correctly):
   call ale#test#SetFilename('ols_paths/file.ml')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/ols_paths'),
+  \ ale#path#Simplify(g:dir . '/ols_paths'),
   \ ale#handlers#ols#GetProjectRoot(bufnr(''))
 
 Execute(The local executable should be used when available):
   call ale#test#SetFilename('ols_paths/file.ml')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/ols_paths/node_modules/.bin/ocaml-language-server'),
+  \ ale#path#Simplify(g:dir . '/ols_paths/node_modules/.bin/ocaml-language-server'),
   \ ale#handlers#ols#GetExecutable(bufnr(''))
 
 Execute(The gloabl executable should always be used when use_global is set):
diff --git a/test/command_callback/test_perlcritic_command_callback.vader b/test/command_callback/test_perlcritic_command_callback.vader
index 8f339d3..6507868 100644
--- a/test/command_callback/test_perlcritic_command_callback.vader
+++ b/test/command_callback/test_perlcritic_command_callback.vader
@@ -43,7 +43,7 @@ Execute(The command should be correct with g:ale_perl_perlcritic_showrules on):
 Execute(The command search for the profile file when set):
   let b:ale_perl_perlcritic_profile = 'README.md'
 
-  let b:readme_path = ale#path#Winify(expand('%:p:h:h:h') . '/README.md')
+  let b:readme_path = ale#path#Simplify(expand('%:p:h:h:h') . '/README.md')
 
   AssertEqual
   \ ale#Escape('perlcritic') . ' --verbose ''%l:%c %m\n'' --nocolor'
diff --git a/test/command_callback/test_php_langserver_callbacks.vader b/test/command_callback/test_php_langserver_callbacks.vader
index 0c7e69e..0dc3063 100644
--- a/test/command_callback/test_php_langserver_callbacks.vader
+++ b/test/command_callback/test_php_langserver_callbacks.vader
@@ -33,10 +33,10 @@ Execute(Vendor executables should be detected):
   call ale#test#SetFilename('php-langserver-project/test.php')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/php-langserver-project/vendor/bin/php-language-server.php'),
+  \ ale#path#Simplify(g:dir . '/php-langserver-project/vendor/bin/php-language-server.php'),
   \ ale_linters#php#langserver#GetExecutable(bufnr(''))
   AssertEqual
-  \ 'php ' . ale#Escape(ale#path#Winify(
+  \ 'php ' . ale#Escape(ale#path#Simplify(
   \   g:dir
   \   . '/php-langserver-project/vendor/bin/php-language-server.php'
   \ )),
diff --git a/test/command_callback/test_puglint_command_callback.vader b/test/command_callback/test_puglint_command_callback.vader
index 1194658..f9b4a85 100644
--- a/test/command_callback/test_puglint_command_callback.vader
+++ b/test/command_callback/test_puglint_command_callback.vader
@@ -21,12 +21,12 @@ Execute(puglint should detect local executables and package.json):
   call ale#test#SetFilename('puglint_project/test.pug')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'),
+  \ ale#path#Simplify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'),
   \ ale_linters#pug#puglint#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ ale#Escape(ale#path#Winify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
-  \   . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/puglint_project/package.json'))
+  \ ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
+  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/package.json'))
   \   . ' -r inline %t',
   \ ale_linters#pug#puglint#GetCommand(bufnr(''))
 
@@ -39,7 +39,7 @@ Execute(puglint should use global executables if configured):
 
   AssertEqual
   \ ale#Escape('pug-lint')
-  \   . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/puglint_project/package.json'))
+  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/package.json'))
   \   . ' -r inline %t',
   \ ale_linters#pug#puglint#GetCommand(bufnr(''))
 
@@ -47,8 +47,8 @@ Execute(puglint should detect .pug-lintrc):
   call ale#test#SetFilename('puglint_project/puglint_rc_dir/subdir/test.pug')
 
   AssertEqual
-  \ ale#Escape(ale#path#Winify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
-  \   . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/puglint_project/puglint_rc_dir/.pug-lintrc'))
+  \ ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
+  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/puglint_rc_dir/.pug-lintrc'))
   \   . ' -r inline %t',
   \ ale_linters#pug#puglint#GetCommand(bufnr(''))
 
@@ -56,8 +56,8 @@ Execute(puglint should detect .pug-lintrc.js):
   call ale#test#SetFilename('puglint_project/puglint_rc_js_dir/subdir/test.pug')
 
   AssertEqual
-  \ ale#Escape(ale#path#Winify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
-  \   . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/puglint_project/puglint_rc_js_dir/.pug-lintrc.js'))
+  \ ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
+  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/puglint_rc_js_dir/.pug-lintrc.js'))
   \   . ' -r inline %t',
   \ ale_linters#pug#puglint#GetCommand(bufnr(''))
 
@@ -65,7 +65,7 @@ Execute(puglint should detect .pug-lintrc.json):
   call ale#test#SetFilename('puglint_project/puglint_rc_json_dir/subdir/test.pug')
 
   AssertEqual
-  \ ale#Escape(ale#path#Winify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
-  \   . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/puglint_project/puglint_rc_json_dir/.pug-lintrc.json'))
+  \ ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/node_modules/.bin/pug-lint'))
+  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/puglint_project/puglint_rc_json_dir/.pug-lintrc.json'))
   \   . ' -r inline %t',
   \ ale_linters#pug#puglint#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_pyflakes_command_callback.vader b/test/command_callback/test_pyflakes_command_callback.vader
index 30a106c..e8486ca 100644
--- a/test/command_callback/test_pyflakes_command_callback.vader
+++ b/test/command_callback/test_pyflakes_command_callback.vader
@@ -33,7 +33,7 @@ Execute(The pyflakes executable should be configurable):
 Execute(The pyflakes executable should be run from the virtualenv path):
   call ale#test#SetFilename('python_paths/with_virtualenv/subdir/foo/bar.py')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \ g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/pyflakes'
   \)
 
diff --git a/test/command_callback/test_pylint_command_callback.vader b/test/command_callback/test_pylint_command_callback.vader
index 447409b..1ff8e35 100644
--- a/test/command_callback/test_pylint_command_callback.vader
+++ b/test/command_callback/test_pylint_command_callback.vader
@@ -61,7 +61,7 @@ Execute(The pylint callbacks shouldn't detect virtualenv directories where they
 Execute(The pylint callbacks should detect virtualenv directories):
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \ g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/pylint'
   \)
 
diff --git a/test/command_callback/test_pyls_command_callback.vader b/test/command_callback/test_pyls_command_callback.vader
index 9f9703d..06ea718 100644
--- a/test/command_callback/test_pyls_command_callback.vader
+++ b/test/command_callback/test_pyls_command_callback.vader
@@ -33,7 +33,7 @@ Execute(The pyls executable should be configurable):
 Execute(The pyls executable should be run from the virtualenv path):
   call ale#test#SetFilename('python_paths/with_virtualenv/subdir/foo/bar.py')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \ g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/pyls'
   \)
 
diff --git a/test/command_callback/test_rails_best_practices_command_callback.vader b/test/command_callback/test_rails_best_practices_command_callback.vader
index 7305f4a..b4d2e82 100644
--- a/test/command_callback/test_rails_best_practices_command_callback.vader
+++ b/test/command_callback/test_rails_best_practices_command_callback.vader
@@ -9,7 +9,7 @@ Before:
 
   let b:args = '--silent -f json'
   \ . ' --output-file ' . (has('win32') ? '%t' : '/dev/stdout')
-  let b:app_path = ale#path#Winify(g:dir . '/../ruby_fixtures/valid_rails_app')
+  let b:app_path = ale#path#Simplify(g:dir . '/../ruby_fixtures/valid_rails_app')
   let b:suffix = has('win32') ? '; type %t' : ''
 
 After:
diff --git a/test/command_callback/test_reason_ols_callbacks.vader b/test/command_callback/test_reason_ols_callbacks.vader
index ffe403f..5fb39af 100644
--- a/test/command_callback/test_reason_ols_callbacks.vader
+++ b/test/command_callback/test_reason_ols_callbacks.vader
@@ -32,14 +32,14 @@ Execute(The project root should be detected correctly):
   call ale#test#SetFilename('ols_paths/file.re')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/ols_paths'),
+  \ ale#path#Simplify(g:dir . '/ols_paths'),
   \ ale#handlers#ols#GetProjectRoot(bufnr(''))
 
 Execute(The local executable should be used when available):
   call ale#test#SetFilename('ols_paths/file.re')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/ols_paths/node_modules/.bin/ocaml-language-server'),
+  \ ale#path#Simplify(g:dir . '/ols_paths/node_modules/.bin/ocaml-language-server'),
   \ ale#handlers#ols#GetExecutable(bufnr(''))
 
 Execute(The gloabl executable should always be used when use_global is set):
diff --git a/test/command_callback/test_rubocop_command_callback.vader b/test/command_callback/test_rubocop_command_callback.vader
index fddf714..f0aa194 100644
--- a/test/command_callback/test_rubocop_command_callback.vader
+++ b/test/command_callback/test_rubocop_command_callback.vader
@@ -17,7 +17,7 @@ Execute(Executable should default to rubocop):
   AssertEqual
   \ ale#Escape('rubocop')
   \   . ' --format json --force-exclusion  --stdin '
-  \   . ale#Escape(ale#path#Winify(g:dir . '/dummy.rb')),
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/dummy.rb')),
   \ ale_linters#ruby#rubocop#GetCommand(bufnr(''))
 
 Execute(Should be able to set a custom executable):
@@ -26,7 +26,7 @@ Execute(Should be able to set a custom executable):
   AssertEqual
   \ ale#Escape('bin/rubocop')
   \   . ' --format json --force-exclusion  --stdin '
-  \   . ale#Escape(ale#path#Winify(g:dir . '/dummy.rb')),
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/dummy.rb')),
   \ ale_linters#ruby#rubocop#GetCommand(bufnr(''))
 
 Execute(Setting bundle appends 'exec rubocop'):
@@ -35,5 +35,5 @@ Execute(Setting bundle appends 'exec rubocop'):
   AssertEqual
   \ ale#Escape('path to/bundle') . ' exec rubocop'
   \   . ' --format json --force-exclusion  --stdin '
-  \   . ale#Escape(ale#path#Winify(g:dir . '/dummy.rb')),
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/dummy.rb')),
   \ ale_linters#ruby#rubocop#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_rust_rls_callbacks.vader b/test/command_callback/test_rust_rls_callbacks.vader
index e467fd9..693d6e9 100644
--- a/test/command_callback/test_rust_rls_callbacks.vader
+++ b/test/command_callback/test_rust_rls_callbacks.vader
@@ -37,5 +37,5 @@ Execute(The project root should be detected correctly):
   call ale#test#SetFilename('rust-rls-project/test.rs')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/rust-rls-project'),
+  \ ale#path#Simplify(g:dir . '/rust-rls-project'),
   \ ale_linters#rust#rls#GetProjectRoot(bufnr(''))
diff --git a/test/command_callback/test_shellcheck_command_callback.vader b/test/command_callback/test_shellcheck_command_callback.vader
index bf422b2..68694b6 100644
--- a/test/command_callback/test_shellcheck_command_callback.vader
+++ b/test/command_callback/test_shellcheck_command_callback.vader
@@ -12,7 +12,7 @@ Before:
   call ale#test#SetDirectory('/testplugin/test/command_callback')
   call ale#test#SetFilename('test.sh')
 
-  let b:prefix = 'cd ' . ale#Escape(ale#path#Winify(g:dir)) . ' && '
+  let b:prefix = 'cd ' . ale#Escape(ale#path#Simplify(g:dir)) . ' && '
   let b:suffix = ' -f gcc -'
 
 After:
diff --git a/test/command_callback/test_slimlint_command_callback.vader b/test/command_callback/test_slimlint_command_callback.vader
index d4dad4c..38588a1 100644
--- a/test/command_callback/test_slimlint_command_callback.vader
+++ b/test/command_callback/test_slimlint_command_callback.vader
@@ -20,7 +20,7 @@ Execute(The default command should be correct):
 Execute(The command should have the .rubocop.yml prepended as an env var if one exists):
   call ale#test#SetFilename('../slimlint-test-files/subdir/file.slim')
 
-  let b:conf = ale#path#Winify(g:dir . '/../slimlint-test-files/.rubocop.yml')
+  let b:conf = ale#path#Simplify(g:dir . '/../slimlint-test-files/.rubocop.yml')
 
   if has('win32')
     " Windows uses 'set var=... && command'
diff --git a/test/command_callback/test_standard_command_callback.vader b/test/command_callback/test_standard_command_callback.vader
index 279109e..3dee285 100644
--- a/test/command_callback/test_standard_command_callback.vader
+++ b/test/command_callback/test_standard_command_callback.vader
@@ -27,7 +27,7 @@ After:
 Execute(bin/cmd.js paths should be preferred):
   call ale#test#SetFilename('standard-test-files/with-cmd/testfile.js')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \   g:dir
   \   . '/standard-test-files/with-cmd/node_modules/standard/bin/cmd.js'
   \)
@@ -45,7 +45,7 @@ Execute(bin/cmd.js paths should be preferred):
 Execute(.bin directories should be used too):
   call ale#test#SetFilename('standard-test-files/with-bin/testfile.js')
 
-  let b:executable = ale#path#Winify(
+  let b:executable = ale#path#Simplify(
   \   g:dir
   \   . '/standard-test-files/with-bin/node_modules/.bin/standard'
   \)
diff --git a/test/command_callback/test_swaglint_command_callback.vader b/test/command_callback/test_swaglint_command_callback.vader
index 0f1d870..51a1009 100644
--- a/test/command_callback/test_swaglint_command_callback.vader
+++ b/test/command_callback/test_swaglint_command_callback.vader
@@ -34,10 +34,10 @@ Execute(The yaml swaglint command callback should allow a local installation to
   call ale#test#SetFilename('swaglint_paths/docs/swagger.yaml')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint'),
+  \ ale#path#Simplify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint'),
   \ ale_linters#yaml#swaglint#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint')
+  \ ale#path#Simplify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint')
   \   . ' -r compact --stdin',
   \ ale_linters#yaml#swaglint#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_write_good_command_callback.vader b/test/command_callback/test_write_good_command_callback.vader
index d9f0049..8d9e9a0 100644
--- a/test/command_callback/test_write_good_command_callback.vader
+++ b/test/command_callback/test_write_good_command_callback.vader
@@ -34,10 +34,10 @@ Execute(Should use the node_modules/.bin executable, if available):
   call ale#test#SetFilename('write-good-node-modules/test.txt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good'),
+  \ ale#path#Simplify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good'),
   \ ale#handlers#writegood#GetExecutable(bufnr(''))
   AssertEqual
-  \ ale#Escape(ale#path#Winify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good'))
+  \ ale#Escape(ale#path#Simplify(g:dir . '/write-good-node-modules/node_modules/.bin/write-good'))
   \   . ' %t',
   \ ale#handlers#writegood#GetCommand(bufnr(''))
 
@@ -45,11 +45,11 @@ Execute(Should use the node_modules/write-good executable, if available):
   call ale#test#SetFilename('write-good-node-modules-2/test.txt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js'),
+  \ ale#path#Simplify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js'),
   \ ale#handlers#writegood#GetExecutable(bufnr(''))
   AssertEqual
   \   (has('win32') ? 'node.exe ' : '')
-  \   . ale#Escape(ale#path#Winify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js'))
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/write-good-node-modules-2/node_modules/write-good/bin/write-good.js'))
   \   . ' %t',
   \ ale#handlers#writegood#GetCommand(bufnr(''))
 
diff --git a/test/fix/test_ale_fix.vader b/test/fix/test_ale_fix.vader
index 2a3e62c..fa1101e 100644
--- a/test/fix/test_ale_fix.vader
+++ b/test/fix/test_ale_fix.vader
@@ -515,7 +515,7 @@ Execute(ale#fix#InitBufferData() should set up the correct data):
   \ bufnr(''): {
   \   'temporary_directory_list': [],
   \   'vars': b:,
-  \   'filename': ale#path#Winify(getcwd() . '/fix_test_file'),
+  \   'filename': ale#path#Simplify(getcwd() . '/fix_test_file'),
   \   'done': 0,
   \   'lines_before': ['a', 'b', 'c'],
   \   'should_save': 1,
diff --git a/test/fixers/test_autopep8_fixer_callback.vader b/test/fixers/test_autopep8_fixer_callback.vader
index 600fb19..5678aaf 100644
--- a/test/fixers/test_autopep8_fixer_callback.vader
+++ b/test/fixers/test_autopep8_fixer_callback.vader
@@ -27,7 +27,7 @@ Execute(The autopep8 callback should return the correct default values):
 
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/autopep8')) . ' -'},
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/autopep8')) . ' -'},
   \ ale#fixers#autopep8#Fix(bufnr(''))
 
 Execute(The autopep8 callback should include options):
@@ -35,5 +35,5 @@ Execute(The autopep8 callback should include options):
 
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/autopep8')) . ' --some-option -' },
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/autopep8')) . ' --some-option -' },
   \ ale#fixers#autopep8#Fix(bufnr(''))
diff --git a/test/fixers/test_elm_format_fixer_callback.vader b/test/fixers/test_elm_format_fixer_callback.vader
index 8552c5d..d613aa8 100644
--- a/test/fixers/test_elm_format_fixer_callback.vader
+++ b/test/fixers/test_elm_format_fixer_callback.vader
@@ -15,7 +15,7 @@ Execute(The elm-format command should have default params):
   \ {
   \   'read_temporary_file': 1,
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
   \     . ' %t --yes',
   \ },
   \ ale#fixers#format#Fix(bufnr(''))
@@ -55,7 +55,7 @@ Execute(The elm-format command should manage empty options):
   \ {
   \   'read_temporary_file': 1,
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
   \     . ' %t',
   \ },
   \ ale#fixers#format#Fix(bufnr(''))
@@ -68,7 +68,7 @@ Execute(The elm-format command should manage custom options):
   \ {
   \   'read_temporary_file': 1,
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../elm-test-files/node_modules/.bin/elm-format'))
   \     . ' %t --param1 --param2',
   \ },
   \ ale#fixers#format#Fix(bufnr(''))
diff --git a/test/fixers/test_eslint_fixer_callback.vader b/test/fixers/test_eslint_fixer_callback.vader
index aafc4e7..be33825 100644
--- a/test/fixers/test_eslint_fixer_callback.vader
+++ b/test/fixers/test_eslint_fixer_callback.vader
@@ -13,8 +13,8 @@ Execute(The executable path should be correct):
   \ {
   \   'read_temporary_file': 1,
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
-  \     . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#ApplyFixForVersion(bufnr(''), ['v4.4.1 (eslint_d v5.1.0)'])
@@ -26,8 +26,8 @@ Execute(The lower priority configuration file in a nested directory should be pr
   \ {
   \   'read_temporary_file': 1,
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
-  \     . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/subdir-with-config/.eslintrc'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/subdir-with-config/.eslintrc'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#ApplyFixForVersion(bufnr(''), [])
@@ -39,8 +39,8 @@ Execute(package.json should be used as a last resort):
   \ {
   \   'read_temporary_file': 1,
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
-  \     . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#ApplyFixForVersion(bufnr(''), [])
@@ -51,8 +51,8 @@ Execute(package.json should be used as a last resort):
   \ {
   \   'read_temporary_file': 1,
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/node_modules/.bin/eslint'))
-  \     . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/package.json'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/node_modules/.bin/eslint'))
+  \     . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/package.json'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#ApplyFixForVersion(bufnr(''), [])
@@ -64,7 +64,7 @@ Execute(The version check should be correct):
   \ {
   \   'chain_with': 'ale#fixers#eslint#ApplyFixForVersion',
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
   \     . ' --version'
   \ },
   \ ale#fixers#eslint#Fix(bufnr(''))
@@ -75,7 +75,7 @@ Execute(--fix-dry-run should be used for 4.9.0 and up):
   AssertEqual
   \ {
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
   \     . ' --stdin-filename %s --stdin --fix-dry-run --format=json',
   \   'process_with': 'ale#fixers#eslint#ProcessFixDryRunOutput',
   \ },
@@ -88,8 +88,8 @@ Execute(--fix-to-stdout should be used for eslint_d):
   \ {
   \   'read_temporary_file': 1,
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
-  \     . ' -c ' . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/package.json'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
+  \     . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/package.json'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#eslint#ApplyFixForVersion(bufnr(''), [''])
@@ -99,7 +99,7 @@ Execute(--fix-to-stdout should be used for eslint_d):
   AssertEqual
   \ {
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
   \     . ' --stdin-filename %s --stdin --fix-to-stdout',
   \   'process_with': 'ale#fixers#eslint#ProcessEslintDOutput',
   \ },
@@ -109,7 +109,7 @@ Execute(--fix-to-stdout should be used for eslint_d):
   AssertEqual
   \ {
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'))
   \     . ' --stdin-filename %s --stdin --fix-to-stdout',
   \   'process_with': 'ale#fixers#eslint#ProcessEslintDOutput',
   \ },
@@ -133,7 +133,7 @@ Execute(The version number should be cached):
   AssertEqual
   \ {
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
   \     . ' --stdin-filename %s --stdin --fix-dry-run --format=json',
   \   'process_with': 'ale#fixers#eslint#ProcessFixDryRunOutput',
   \ },
diff --git a/test/fixers/test_isort_fixer_callback.vader b/test/fixers/test_isort_fixer_callback.vader
index ea4426d..503057b 100644
--- a/test/fixers/test_isort_fixer_callback.vader
+++ b/test/fixers/test_isort_fixer_callback.vader
@@ -25,5 +25,5 @@ Execute(The isort callback should return the correct default values):
 
   silent execute 'file ' . fnameescape(g:dir . '/python_paths/with_virtualenv/subdir/foo/bar.py')
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/isort')) . ' -' },
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/isort')) . ' -' },
   \ ale#fixers#isort#Fix(bufnr(''))
diff --git a/test/fixers/test_phpcbf_fixer_callback.vader b/test/fixers/test_phpcbf_fixer_callback.vader
index b5c72f2..1663c89 100644
--- a/test/fixers/test_phpcbf_fixer_callback.vader
+++ b/test/fixers/test_phpcbf_fixer_callback.vader
@@ -21,7 +21,7 @@ Execute(project with phpcbf should use local by default):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf'),
+  \ ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf'),
   \ ale#fixers#phpcbf#GetExecutable(bufnr(''))
 
 Execute(use-global should override local detection):
@@ -43,7 +43,7 @@ Execute(The phpcbf callback should return the correct default values):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s  -' },
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s  -' },
   \ ale#fixers#phpcbf#Fix(bufnr(''))
 
 Execute(The phpcbf callback should include the phpcbf_standard option):
@@ -51,7 +51,7 @@ Execute(The phpcbf callback should include the phpcbf_standard option):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s ' . '--standard=phpcbf_ruleset.xml' . ' -'},
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s ' . '--standard=phpcbf_ruleset.xml' . ' -'},
   \ ale#fixers#phpcbf#Fix(bufnr(''))
 
 Before:
@@ -77,7 +77,7 @@ Execute(project with phpcbf should use local by default):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf'),
+  \ ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf'),
   \ ale#fixers#phpcbf#GetExecutable(bufnr(''))
 
 Execute(use-global should override local detection):
@@ -99,7 +99,7 @@ Execute(The phpcbf callback should return the correct default values):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s  -' },
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s  -' },
   \ ale#fixers#phpcbf#Fix(bufnr(''))
 
 Execute(The phpcbf callback should include the phpcbf_standard option):
@@ -107,6 +107,6 @@ Execute(The phpcbf callback should include the phpcbf_standard option):
   call ale#test#SetFilename('php_paths/project-with-phpcbf/foo/test.php')
 
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s ' . '--standard=phpcbf_ruleset.xml' . ' -'},
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/php_paths/project-with-phpcbf/vendor/bin/phpcbf')) . ' --stdin-path=%s ' . '--standard=phpcbf_ruleset.xml' . ' -'},
   \ ale#fixers#phpcbf#Fix(bufnr(''))
 
diff --git a/test/fixers/test_prettier_eslint_fixer.callback.vader b/test/fixers/test_prettier_eslint_fixer.callback.vader
index 1ff11fe..ef0b35d 100644
--- a/test/fixers/test_prettier_eslint_fixer.callback.vader
+++ b/test/fixers/test_prettier_eslint_fixer.callback.vader
@@ -54,7 +54,7 @@ Execute(--eslint-config-path should be set for 4.2.0 and up):
   \   'command':
   \     ale#Escape('prettier-eslint')
   \     . ' %t'
-  \     . ' --eslint-config-path ' . ale#Escape(ale#path#Winify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
+  \     . ' --eslint-config-path ' . ale#Escape(ale#path#Simplify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --write'
   \ },
   \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), ['4.2.0'])
@@ -87,7 +87,7 @@ Execute(The new --stdin-filepath option should be used when the version is new e
   \ {
   \   'command': 'cd ' . ale#Escape(expand('%:p:h')) . ' && '
   \     . ale#Escape('prettier-eslint')
-  \     . ' --eslint-config-path ' . ale#Escape(ale#path#Winify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
+  \     . ' --eslint-config-path ' . ale#Escape(ale#path#Simplify(g:dir . '/eslint-test-files/react-app/.eslintrc.js'))
   \     . ' --stdin-filepath %s --stdin',
   \ },
   \ ale#fixers#prettier_eslint#ApplyFixForVersion(bufnr(''), ['4.4.0'])
diff --git a/test/fixers/test_rubocop_fixer_callback.vader b/test/fixers/test_rubocop_fixer_callback.vader
index ff2ca96..045256f 100644
--- a/test/fixers/test_rubocop_fixer_callback.vader
+++ b/test/fixers/test_rubocop_fixer_callback.vader
@@ -34,7 +34,7 @@ Execute(The rubocop callback should include configuration files):
   \ {
   \   'read_temporary_file': 1,
   \   'command': ale#Escape(g:ale_ruby_rubocop_executable)
-  \     . ' --config ' . ale#Escape(ale#path#Winify(g:dir . '/ruby_paths/with_config/.rubocop.yml'))
+  \     . ' --config ' . ale#Escape(ale#path#Simplify(g:dir . '/ruby_paths/with_config/.rubocop.yml'))
   \     . ' --auto-correct %t',
   \ },
   \ ale#fixers#rubocop#Fix(bufnr(''))
@@ -47,7 +47,7 @@ Execute(The rubocop callback should include custom rubocop options):
   \ {
   \   'read_temporary_file': 1,
   \   'command': ale#Escape(g:ale_ruby_rubocop_executable)
-  \     . ' --config ' . ale#Escape(ale#path#Winify(g:dir . '/ruby_paths/with_config/.rubocop.yml'))
+  \     . ' --config ' . ale#Escape(ale#path#Simplify(g:dir . '/ruby_paths/with_config/.rubocop.yml'))
   \     . ' --except Lint/Debugger'
   \     . ' --auto-correct %t',
   \ },
diff --git a/test/fixers/test_standard_fixer_callback.vader b/test/fixers/test_standard_fixer_callback.vader
index 34c752d..38f2d54 100644
--- a/test/fixers/test_standard_fixer_callback.vader
+++ b/test/fixers/test_standard_fixer_callback.vader
@@ -11,7 +11,7 @@ Execute(The executable path should be correct):
   \ {
   \   'read_temporary_file': 1,
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/standard/bin/cmd.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/standard/bin/cmd.js'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#standard#Fix(bufnr(''))
diff --git a/test/fixers/test_stylelint_fixer_callback.vader b/test/fixers/test_stylelint_fixer_callback.vader
index a0fc6ff..90a9dc1 100644
--- a/test/fixers/test_stylelint_fixer_callback.vader
+++ b/test/fixers/test_stylelint_fixer_callback.vader
@@ -11,7 +11,7 @@ Execute(The executable path should be correct):
   \ {
   \   'read_temporary_file': 1,
   \   'command': (has('win32') ? 'node.exe ' : '')
-  \     . ale#Escape(ale#path#Winify(g:dir . '/../eslint-test-files/react-app/node_modules/stylelint/bin/stylelint.js'))
+  \     . ale#Escape(ale#path#Simplify(g:dir . '/../eslint-test-files/react-app/node_modules/stylelint/bin/stylelint.js'))
   \     . ' --fix %t',
   \ },
   \ ale#fixers#stylelint#Fix(bufnr(''))
diff --git a/test/fixers/test_yapf_fixer_callback.vader b/test/fixers/test_yapf_fixer_callback.vader
index e607556..cfc508c 100644
--- a/test/fixers/test_yapf_fixer_callback.vader
+++ b/test/fixers/test_yapf_fixer_callback.vader
@@ -26,7 +26,7 @@ Execute(The yapf callback should return the correct default values):
   call ale#test#SetFilename('python_paths/with_virtualenv/subdir/foo/bar.py')
 
   AssertEqual
-  \ {'command': ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/yapf'))},
+  \ {'command': ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/yapf'))},
   \ ale#fixers#yapf#Fix(bufnr(''))
   \
 Execute(The yapf should include the .style.yapf file if present):
@@ -35,8 +35,8 @@ Execute(The yapf should include the .style.yapf file if present):
   AssertEqual
   \ {
   \   'command':
-  \     ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/yapf'))
+  \     ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/env/' . b:bin_dir . '/yapf'))
   \     . ' --no-local-style'
-  \     . ' --style ' . ale#Escape(ale#path#Winify(g:dir . '/python_paths/with_virtualenv/dir_with_yapf_config/.style.yapf')),
+  \     . ' --style ' . ale#Escape(ale#path#Simplify(g:dir . '/python_paths/with_virtualenv/dir_with_yapf_config/.style.yapf')),
   \ },
   \ ale#fixers#yapf#Fix(bufnr(''))
diff --git a/test/handler/test_brakeman_handler.vader b/test/handler/test_brakeman_handler.vader
index 5a39879..02eb31b 100644
--- a/test/handler/test_brakeman_handler.vader
+++ b/test/handler/test_brakeman_handler.vader
@@ -34,7 +34,7 @@ Execute(The brakeman handler should parse JSON correctly):
   \        '"fingerprint": "1234",',
   \        '"check_name": "SQL",',
   \        '"message": "Possible SQL injection",',
-  \        '"file": "' . substitute(ale#path#Winify('app/models/thing.rb'), '\\', '\\\\', 'g') . '",',
+  \        '"file": "' . substitute(ale#path#Simplify('app/models/thing.rb'), '\\', '\\\\', 'g') . '",',
   \        '"line": 84,',
   \        '"link": "http://brakemanscanner.org/docs/warning_types/sql_injection/",',
   \        '"code": "Thing.connection.execute(params[:data])",',
@@ -53,7 +53,7 @@ Execute(The brakeman handler should parse JSON correctly):
   \        '"fingerprint": "1235",',
   \        '"check_name": "ModelAttrAccessible",',
   \        '"message": "Potentially dangerous attribute available for mass assignment",',
-  \        '"file": "' .  substitute(ale#path#Winify('app/models/thing.rb'), '\\', '\\\\', 'g') . '",',
+  \        '"file": "' .  substitute(ale#path#Simplify('app/models/thing.rb'), '\\', '\\\\', 'g') . '",',
   \        '"line": null,',
   \        '"link": "http://brakemanscanner.org/docs/warning_types/mass_assignment/",',
   \        '"code": ":name",',
diff --git a/test/handler/test_ghc_handler.vader b/test/handler/test_ghc_handler.vader
index 2a26f86..b040a23 100644
--- a/test/handler/test_ghc_handler.vader
+++ b/test/handler/test_ghc_handler.vader
@@ -48,11 +48,11 @@ Execute(The ghc handler should handle ghc 8 output):
   \ ],
   \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
   \ '',
-  \ ale#path#Winify('src/Appoint/Lib.hs') . ':6:1: error:',
+  \ ale#path#Simplify('src/Appoint/Lib.hs') . ':6:1: error:',
   \ '    Failed to load interface for ‘GitHub.Data’',
   \ '    Use -v to see a list of the files searched for.',
   \ '',
-  \ ale#path#Winify('src/Appoint/Lib.hs') . ':7:1: warning:',
+  \ ale#path#Simplify('src/Appoint/Lib.hs') . ':7:1: warning:',
   \ '    Failed to load interface for ‘GitHub.Endpoints.PullRequests’',
   \ '    Use -v to see a list of the files searched for.',
   \ ])
@@ -92,12 +92,12 @@ Execute(The ghc handler should handle ghc 7 output):
   \   },
   \ ],
   \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
-  \ ale#path#Winify('src/Main.hs') . ':168:1:',
+  \ ale#path#Simplify('src/Main.hs') . ':168:1:',
   \ '    parse error (possibly incorrect indentation or mismatched brackets)',
-  \ ale#path#Winify('src/Main.hs') . ':84:1:Warning:',
+  \ ale#path#Simplify('src/Main.hs') . ':84:1:Warning:',
   \ '    Top-level binding with no type signature:',
   \ '    myLayout :: Choose Tall (Choose (Mirror Tall) Full) a',
-  \ ale#path#Winify('src/Main.hs') . ':94:5:Error:',
+  \ ale#path#Simplify('src/Main.hs') . ':94:5:Error:',
   \ '  Some other error',
   \ ])
 
@@ -122,7 +122,7 @@ Execute(The ghc handler should handle stack 1.5.1 output):
   \   },
   \ ],
   \ ale#handlers#haskell#HandleGHCFormat(bufnr(''), [
-  \   '    ' . ale#path#Winify('src/Main.hs') . ':160:14: error:',
+  \   '    ' . ale#path#Simplify('src/Main.hs') . ':160:14: error:',
   \   '        • Expecting one fewer arguments to ‘Exp’',
   \   '          Expected kind ‘k0 -> *’, but ‘Exp’ has kind ‘*’',
   \   '        • In the type ‘Exp a’',
diff --git a/test/handler/test_gobuild_handler.vader b/test/handler/test_gobuild_handler.vader
index ec77f9c..17608c3 100644
--- a/test/handler/test_gobuild_handler.vader
+++ b/test/handler/test_gobuild_handler.vader
@@ -37,7 +37,7 @@ Execute (The gobuild handler should handle relative paths correctly):
   \     'col': 0,
   \     'text': 'missing argument for Printf("%s"): format reads arg 2, have only 1 args',
   \     'type': 'E',
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.go'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.go'),
   \   },
   \ ],
   \ ale_linters#go#gobuild#Handler(bufnr(''), [
diff --git a/test/handler/test_gometalinter_handler.vader b/test/handler/test_gometalinter_handler.vader
index 703040e..1aade8a 100644
--- a/test/handler/test_gometalinter_handler.vader
+++ b/test/handler/test_gometalinter_handler.vader
@@ -41,14 +41,14 @@ Execute (The gometalinter handler should handle paths correctly):
   \     'col': 3,
   \     'text': 'expected ''package'', found ''IDENT'' gibberish (staticcheck)',
   \     'type': 'W',
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.go'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.go'),
   \   },
   \   {
   \     'lnum': 37,
   \     'col': 5,
   \     'text': 'expected ''package'', found ''IDENT'' gibberish (golint)',
   \     'type': 'E',
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.go'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.go'),
   \   },
   \ ],
   \ ale_linters#go#gometalinter#Handler(bufnr(''), [
diff --git a/test/handler/test_javac_handler.vader b/test/handler/test_javac_handler.vader
index 6189e6e..ff4e163 100644
--- a/test/handler/test_javac_handler.vader
+++ b/test/handler/test_javac_handler.vader
@@ -69,13 +69,13 @@ Execute(The javac handler should resolve files from different directories):
   AssertEqual
   \ [
   \   {
-  \     'filename': ale#path#Winify(g:dir . '/Foo.java'),
+  \     'filename': ale#path#Simplify(g:dir . '/Foo.java'),
   \     'lnum': 1,
   \     'text': 'error: some error',
   \     'type': 'E',
   \   },
   \   {
-  \     'filename': ale#path#Winify(g:dir . '/Bar.java'),
+  \     'filename': ale#path#Simplify(g:dir . '/Bar.java'),
   \     'lnum': 1,
   \     'text': 'error: some error',
   \     'type': 'E',
diff --git a/test/handler/test_lessc_handler.vader b/test/handler/test_lessc_handler.vader
index 530c582..31de559 100644
--- a/test/handler/test_lessc_handler.vader
+++ b/test/handler/test_lessc_handler.vader
@@ -32,14 +32,14 @@ Execute(The lessc handler should handle errors for other files in the same direc
   \     'col': 1,
   \     'type': 'E',
   \     'text': 'Unrecognised input. Possibly missing something',
-  \     'filename': ale#path#Winify(g:dir . '/imported.less')
+  \     'filename': ale#path#Simplify(g:dir . '/imported.less')
   \   },
   \   {
   \     'lnum': 2,
   \     'col': 1,
   \     'type': 'E',
   \     'text': 'Unrecognised input. Possibly missing something',
-  \     'filename': ale#path#Winify(g:dir . '/imported.less')
+  \     'filename': ale#path#Simplify(g:dir . '/imported.less')
   \   },
   \ ],
   \ ale_linters#less#lessc#Handle(bufnr(''), [
@@ -59,7 +59,7 @@ Execute(The lessc handler should handle errors for files in directories above co
   \     'col': 1,
   \     'type': 'E',
   \     'text': 'Unrecognised input. Possibly missing something',
-  \     'filename': ale#path#Winify(g:dir . '/../imported2.less')
+  \     'filename': ale#path#Simplify(g:dir . '/../imported2.less')
   \   },
   \ ],
   \ ale_linters#less#lessc#Handle(bufnr(''), [
diff --git a/test/handler/test_mcsc_handler.vader b/test/handler/test_mcsc_handler.vader
index d97a2ed..ac55ee8 100644
--- a/test/handler/test_mcsc_handler.vader
+++ b/test/handler/test_mcsc_handler.vader
@@ -18,7 +18,7 @@ Execute(The mcs handler should work with the default of the buffer's directory):
   \     'text': '; expected',
   \     'code': 'CS1001',
   \     'type': 'E',
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/Test.cs', 'add_drive'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/Test.cs'),
   \   },
   \ ],
   \ ale_linters#cs#mcsc#Handle(347, [
@@ -37,7 +37,7 @@ Execute(The mcs handler should handle cannot find symbol errors):
   \     'text': '; expected',
   \     'code': 'CS1001',
   \     'type': 'E',
-  \     'filename': ale#path#Winify('/home/foo/project/bar/Test.cs', 'add_drive'),
+  \     'filename': ale#path#Simplify('/home/foo/project/bar/Test.cs'),
   \   },
   \   {
   \     'lnum': 101,
@@ -45,7 +45,7 @@ Execute(The mcs handler should handle cannot find symbol errors):
   \     'text': 'Unexpected processor directive (no #if for this #endif)',
   \     'code': 'CS1028',
   \     'type': 'E',
-  \     'filename': ale#path#Winify('/home/foo/project/bar/Test.cs', 'add_drive'),
+  \     'filename': ale#path#Simplify('/home/foo/project/bar/Test.cs'),
   \   },
   \   {
   \     'lnum': 10,
@@ -53,7 +53,7 @@ Execute(The mcs handler should handle cannot find symbol errors):
   \     'text': 'some warning',
   \     'code': 'CS0123',
   \     'type': 'W',
-  \     'filename': ale#path#Winify('/home/foo/project/bar/Test.cs', 'add_drive'),
+  \     'filename': ale#path#Simplify('/home/foo/project/bar/Test.cs'),
   \   },
   \ ],
   \ ale_linters#cs#mcsc#Handle(347, [
diff --git a/test/handler/test_mypy_handler.vader b/test/handler/test_mypy_handler.vader
index a3e224f..abb8504 100644
--- a/test/handler/test_mypy_handler.vader
+++ b/test/handler/test_mypy_handler.vader
@@ -15,35 +15,35 @@ Execute(The mypy handler should parse lines correctly):
   \   {
   \     'lnum': 768,
   \     'col': 38,
-  \     'filename': ale#path#Winify(g:dir . '/baz.py'),
+  \     'filename': ale#path#Simplify(g:dir . '/baz.py'),
   \     'type': 'E',
   \     'text': 'Cannot determine type of ''SOME_SYMBOL''',
   \   },
   \   {
   \     'lnum': 821,
   \     'col': 38,
-  \     'filename': ale#path#Winify(g:dir . '/baz.py'),
+  \     'filename': ale#path#Simplify(g:dir . '/baz.py'),
   \     'type': 'E',
   \     'text': 'Cannot determine type of ''SOME_SYMBOL''',
   \   },
   \   {
   \     'lnum': 38,
   \     'col': 44,
-  \     'filename': ale#path#Winify(g:dir . '/other.py'),
+  \     'filename': ale#path#Simplify(g:dir . '/other.py'),
   \     'type': 'E',
   \     'text': 'Cannot determine type of ''ANOTHER_SYMBOL''',
   \   },
   \   {
   \     'lnum': 15,
   \     'col': 3,
-  \     'filename': ale#path#Winify(g:dir . '/__init__.py'),
+  \     'filename': ale#path#Simplify(g:dir . '/__init__.py'),
   \     'type': 'E',
   \     'text': 'Argument 1 to "somefunc" has incompatible type "int"; expected "str"'
   \   },
   \   {
   \     'lnum': 72,
   \     'col': 1,
-  \     'filename': ale#path#Winify(g:dir . '/__init__.py'),
+  \     'filename': ale#path#Simplify(g:dir . '/__init__.py'),
   \     'type': 'W',
   \     'text': 'Some warning',
   \   },
diff --git a/test/handler/test_perl_handler.vader b/test/handler/test_perl_handler.vader
index 9e1c520..75e8f22 100644
--- a/test/handler/test_perl_handler.vader
+++ b/test/handler/test_perl_handler.vader
@@ -15,9 +15,9 @@ Execute(The Perl linter should ignore errors from other files):
   \    {'lnum': '2', 'type': 'E', 'text': 'Compilation failed in require'},
   \ ],
   \ ale_linters#perl#perl#Handle(bufnr(''), [
-  \   'syntax error at ' . ale#path#Winify(g:dir . '/foo.pm') . ' line 4, near "aklsdfjmy "',
-  \   'Compilation failed in require at ' . ale#path#Winify(g:dir . '/bar.pl') . ' line 2.',
-  \   'BEGIN failed--compilation aborted at ' . ale#path#Winify(g:dir . '/bar.pl') . ' line 2.',
+  \   'syntax error at ' . ale#path#Simplify(g:dir . '/foo.pm') . ' line 4, near "aklsdfjmy "',
+  \   'Compilation failed in require at ' . ale#path#Simplify(g:dir . '/bar.pl') . ' line 2.',
+  \   'BEGIN failed--compilation aborted at ' . ale#path#Simplify(g:dir . '/bar.pl') . ' line 2.',
   \ ])
 
 Execute(The Perl linter should complain about failing to locate modules):
diff --git a/test/handler/test_rstcheck_lint_handler.vader b/test/handler/test_rstcheck_lint_handler.vader
index 928c599..3b4ac03 100644
--- a/test/handler/test_rstcheck_lint_handler.vader
+++ b/test/handler/test_rstcheck_lint_handler.vader
@@ -8,21 +8,21 @@ Execute(Warning and error messages should be handled correctly):
   AssertEqual
   \ [
   \   {
-  \      'filename': ale#path#Winify(expand('%:p:h') . '/bad_python.rst'),
+  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_python.rst'),
   \      'lnum': 7,
   \      'col': 0,
   \      'type': 'W',
   \      'text': '(python) unexpected EOF while parsing',
   \   },
   \   {
-  \      'filename': ale#path#Winify(expand('%:p:h') . '/bad_cpp.rst'),
+  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_cpp.rst'),
   \      'lnum': 9,
   \      'col': 0,
   \      'type': 'W',
   \      'text': '(cpp) error: ''x'' was not declared in this scope',
   \   },
   \   {
-  \      'filename': ale#path#Winify(expand('%:p:h') . '/bad_rst.rst'),
+  \      'filename': ale#path#Simplify(expand('%:p:h') . '/bad_rst.rst'),
   \      'lnum': 1,
   \      'col': 0,
   \      'type': 'E',
diff --git a/test/handler/test_rust_handler.vader b/test/handler/test_rust_handler.vader
index a148103..05bd1e9 100644
--- a/test/handler/test_rust_handler.vader
+++ b/test/handler/test_rust_handler.vader
@@ -110,7 +110,7 @@ Execute(The Rust handler should handle cargo output):
   \           'byte_start': 11505,
   \           'column_end': 8,
   \           'column_start': 5,
-  \           'file_name': ale#path#Winify('src/playpen.rs'),
+  \           'file_name': ale#path#Simplify('src/playpen.rs'),
   \           'is_primary': v:true,
   \           'label': v:null,
   \           'line_end': 15,
@@ -130,7 +130,7 @@ Execute(The Rust handler should handle cargo output):
   \           'byte_start': 11494,
   \           'column_end': 10,
   \           'column_start': 7,
-  \           'file_name': ale#path#Winify('src/playpen.rs'),
+  \           'file_name': ale#path#Simplify('src/playpen.rs'),
   \           'is_primary': v:true,
   \           'label': v:null,
   \           'line_end': 13,
@@ -174,7 +174,7 @@ Execute(The Rust handler should should errors from expansion spans):
   \           'byte_start': 1,
   \           'column_end': 1,
   \           'column_start': 1,
-  \           'file_name': ale#path#Winify('src/other.rs'),
+  \           'file_name': ale#path#Simplify('src/other.rs'),
   \           'is_primary': v:true,
   \           'label': 'some other error',
   \           'line_end': 4,
@@ -185,7 +185,7 @@ Execute(The Rust handler should should errors from expansion spans):
   \               'byte_start': 52,
   \               'column_end': 23,
   \               'column_start': 21,
-  \               'file_name': ale#path#Winify('src/playpen.rs'),
+  \               'file_name': ale#path#Simplify('src/playpen.rs'),
   \               'is_primary': v:true,
   \               'label': 'expected bool, found integral variable',
   \               'line_end': 4,
@@ -227,7 +227,7 @@ Execute(The Rust handler should show detailed errors):
   \           'column_end': 23,
   \           'column_start': 21,
   \           'expansion': v:null,
-  \           'file_name': ale#path#Winify('src/playpen.rs'),
+  \           'file_name': ale#path#Simplify('src/playpen.rs'),
   \           'is_primary': v:true,
   \           'label': 'expected bool, found integral variable',
   \           'line_end': 4,
diff --git a/test/handler/test_tslint_handler.vader b/test/handler/test_tslint_handler.vader
index 8d263ef..32036ed 100644
--- a/test/handler/test_tslint_handler.vader
+++ b/test/handler/test_tslint_handler.vader
@@ -27,7 +27,7 @@ Execute(The tslint handler should parse lines correctly):
   \   {
   \     'lnum': 1,
   \     'col': 15,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.ts'),
   \     'end_lnum': 1,
   \     'type': 'E',
   \     'end_col': 15,
@@ -37,7 +37,7 @@ Execute(The tslint handler should parse lines correctly):
   \   {
   \     'lnum': 2,
   \     'col': 8,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.ts'),
   \     'end_lnum': 3,
   \     'type': 'W',
   \     'end_col': 12,
@@ -46,7 +46,7 @@ Execute(The tslint handler should parse lines correctly):
   \   {
   \     'lnum': 2,
   \     'col': 8,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/something-else.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/something-else.ts'),
   \     'end_lnum': 3,
   \     'type': 'W',
   \     'end_col': 12,
@@ -56,7 +56,7 @@ Execute(The tslint handler should parse lines correctly):
   \   {
   \     'lnum': 31,
   \     'col': 9,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.ts'),
   \     'end_lnum': 31,
   \     'type': 'E',
   \     'end_col': 20,
@@ -157,7 +157,7 @@ Execute(The tslint handler report errors for empty files by default):
   \   {
   \     'lnum': 2,
   \     'col': 1,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.ts'),
   \     'end_lnum': 2,
   \     'type': 'E',
   \     'end_col': 1,
@@ -231,7 +231,7 @@ Execute(The tslint handler should report errors when the ignore option is on, bu
   \   {
   \     'lnum': 2,
   \     'col': 1,
-  \     'filename': ale#path#Winify(expand('%:p:h') . '/test.ts'),
+  \     'filename': ale#path#Simplify(expand('%:p:h') . '/test.ts'),
   \     'end_lnum': 2,
   \     'type': 'E',
   \     'end_col': 1,
diff --git a/test/lsp/test_lsp_client_messages.vader b/test/lsp/test_lsp_client_messages.vader
index 3abdd8a..053da80 100644
--- a/test/lsp/test_lsp_client_messages.vader
+++ b/test/lsp/test_lsp_client_messages.vader
@@ -150,7 +150,7 @@ Execute(ale#lsp#tsserver_message#Open() should return correct messages):
   \   1,
   \   'ts@open',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \   }
   \ ],
   \ ale#lsp#tsserver_message#Open(bufnr(''))
@@ -161,7 +161,7 @@ Execute(ale#lsp#tsserver_message#Close() should return correct messages):
   \   1,
   \   'ts@close',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \   }
   \ ],
   \ ale#lsp#tsserver_message#Close(bufnr(''))
@@ -172,7 +172,7 @@ Execute(ale#lsp#tsserver_message#Change() should return correct messages):
   \   1,
   \   'ts@change',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \     'line': 1,
   \     'offset': 1,
   \     'endLine': 1073741824,
@@ -188,7 +188,7 @@ Execute(ale#lsp#tsserver_message#Geterr() should return correct messages):
   \   1,
   \   'ts@geterr',
   \   {
-  \     'files': [ale#path#Winify(g:dir . '/foo/bar.ts')],
+  \     'files': [ale#path#Simplify(g:dir . '/foo/bar.ts')],
   \   }
   \ ],
   \ ale#lsp#tsserver_message#Geterr(bufnr(''))
@@ -199,7 +199,7 @@ Execute(ale#lsp#tsserver_message#Completions() should return correct messages):
   \   0,
   \   'ts@completions',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \     'line': 347,
   \     'offset': 12,
   \     'prefix': 'abc',
@@ -213,7 +213,7 @@ Execute(ale#lsp#tsserver_message#CompletionEntryDetails() should return correct
   \   0,
   \   'ts@completionEntryDetails',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \     'line': 347,
   \     'offset': 12,
   \     'entryNames': ['foo', 'bar'],
@@ -227,7 +227,7 @@ Execute(ale#lsp#tsserver_message#Definition() should return correct messages):
   \   0,
   \   'ts@definition',
   \   {
-  \     'file': ale#path#Winify(g:dir . '/foo/bar.ts'),
+  \     'file': ale#path#Simplify(g:dir . '/foo/bar.ts'),
   \     'line': 347,
   \     'offset': 12,
   \   }
diff --git a/test/test_c_import_paths.vader b/test/test_c_import_paths.vader
index 21e49a3..6080779 100644
--- a/test/test_c_import_paths.vader
+++ b/test/test_c_import_paths.vader
@@ -39,8 +39,8 @@ Execute(The C GCC handler should include 'include' directories for projects with
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -52,8 +52,8 @@ Execute(The C GCC handler should include 'include' directories for projects with
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -65,8 +65,8 @@ Execute(The C GCC handler should include root directories for projects with .h f
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -78,8 +78,8 @@ Execute(The C GCC handler should include root directories for projects with .hpp
   AssertEqual
   \ ale#Escape('gcc')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#gcc#GetCommand(bufnr(''))
 
@@ -91,8 +91,8 @@ Execute(The C Clang handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -104,8 +104,8 @@ Execute(The C Clang handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -117,8 +117,8 @@ Execute(The C Clang handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -130,8 +130,8 @@ Execute(The C Clang handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('clang')
   \   . ' -S -x c -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#c#clang#GetCommand(bufnr(''))
 
@@ -143,8 +143,8 @@ Execute(The C++ GCC handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -156,8 +156,8 @@ Execute(The C++ GCC handler should include 'include' directories for projects wi
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -169,8 +169,8 @@ Execute(The C++ GCC handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -182,8 +182,8 @@ Execute(The C++ GCC handler should include root directories for projects with .h
   AssertEqual
   \   ale#Escape('gcc')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#gcc#GetCommand(bufnr(''))
 
@@ -195,8 +195,8 @@ Execute(The C++ Clang handler should include 'include' directories for projects
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/makefile_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -208,8 +208,8 @@ Execute(The C++ Clang handler should include 'include' directories for projects
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/configure_project/include')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -221,8 +221,8 @@ Execute(The C++ Clang handler should include root directories for projects with
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/h_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/h_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -234,8 +234,8 @@ Execute(The C++ Clang handler should include root directories for projects with
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project/subdir')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/hpp_file_project')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -255,8 +255,8 @@ Execute(The C++ Clang handler shoud use the include directory based on the .git
   AssertEqual
   \   ale#Escape('clang++')
   \   . ' -S -x c++ -fsyntax-only '
-  \   . '-iquote ' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/git_and_nested_makefiles/src')) . ' '
-  \   . ' -I' . ale#Escape(ale#path#Winify(g:dir .  '/test_c_projects/git_and_nested_makefiles/include')) . ' '
+  \   . '-iquote ' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/git_and_nested_makefiles/src')) . ' '
+  \   . ' -I' . ale#Escape(ale#path#Simplify(g:dir .  '/test_c_projects/git_and_nested_makefiles/include')) . ' '
   \   . ' -'
   \ , ale_linters#cpp#clang#GetCommand(bufnr(''))
 
@@ -268,7 +268,7 @@ Execute(The C++ ClangTidy handler should include json folders for projects with
   AssertEqual
   \ ale#Escape('clang-tidy')
   \   . ' -checks=' . ale#Escape('*') . ' %s '
-  \   . '-p ' . ale#Escape(ale#path#Winify(g:dir . '/test_c_projects/json_project/build'))
+  \   . '-p ' . ale#Escape(ale#path#Simplify(g:dir . '/test_c_projects/json_project/build'))
   \ , ale_linters#cpp#clangtidy#GetCommand(bufnr(''))
 
 Execute(Move .git/HEAD back):
diff --git a/test/test_csslint_config_detection.vader b/test/test_csslint_config_detection.vader
index d84a00f..47e80d0 100644
--- a/test/test_csslint_config_detection.vader
+++ b/test/test_csslint_config_detection.vader
@@ -13,7 +13,7 @@ Execute(--config should be set when the .csslintrc file is found):
   AssertEqual
   \ (
   \   'csslint --format=compact '
-  \   . '--config=' . ale#Escape(ale#path#Winify(g:dir . '/csslint-test-files/some-app/.csslintrc'))
+  \   . '--config=' . ale#Escape(ale#path#Simplify(g:dir . '/csslint-test-files/some-app/.csslintrc'))
   \   . ' %t'
   \ ),
   \ ale_linters#css#csslint#GetCommand(bufnr(''))
diff --git a/test/test_elm_executable_detection.vader b/test/test_elm_executable_detection.vader
index cca8a6e..4227cbf 100644
--- a/test/test_elm_executable_detection.vader
+++ b/test/test_elm_executable_detection.vader
@@ -12,7 +12,7 @@ Execute(should get valid executable with default params):
   call ale#test#SetFilename('elm-test-files/app/testfile.elm')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/elm-test-files/app/node_modules/.bin/elm-make'),
+  \ ale#path#Simplify(g:dir . '/elm-test-files/app/node_modules/.bin/elm-make'),
   \ ale_linters#elm#make#GetExecutable(bufnr(''))
 
 Execute(should get valid executable with 'use_global' params):
diff --git a/test/test_eslint_executable_detection.vader b/test/test_eslint_executable_detection.vader
index ee79242..c1438ed 100644
--- a/test/test_eslint_executable_detection.vader
+++ b/test/test_eslint_executable_detection.vader
@@ -17,7 +17,7 @@ Execute(create-react-app directories should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/react-app/subdir/testfile.js')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'),
+  \ ale#path#Simplify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(use-global should override create-react-app detection):
@@ -33,7 +33,7 @@ Execute(other app directories should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/other-app/subdir/testfile.js')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/eslint-test-files/node_modules/.bin/eslint'),
+  \ ale#path#Simplify(g:dir . '/eslint-test-files/node_modules/.bin/eslint'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(use-global should override other app directories):
@@ -49,7 +49,7 @@ Execute(eslint_d should be detected correctly):
   call ale#test#SetFilename('eslint-test-files/app-with-eslint-d/testfile.js')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'),
+  \ ale#path#Simplify(g:dir . '/eslint-test-files/app-with-eslint-d/node_modules/.bin/eslint_d'),
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
 Execute(eslint.js executables should be run with node on Windows):
@@ -59,6 +59,6 @@ Execute(eslint.js executables should be run with node on Windows):
   " We have to execute the file with node.
   AssertEqual
   \   ale#Escape('node.exe') . ' '
-  \   . ale#Escape(ale#path#Winify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'))
   \   . ' -f unix --stdin --stdin-filename %s',
   \ ale#handlers#eslint#GetCommand(bufnr(''))
diff --git a/test/test_find_nearest_directory.vader b/test/test_find_nearest_directory.vader
index 1442c8f..2529950 100644
--- a/test/test_find_nearest_directory.vader
+++ b/test/test_find_nearest_directory.vader
@@ -8,7 +8,7 @@ Execute(We should be able to find a directory some directory down):
   call ale#test#SetFilename('top/middle/bottom/dummy.txt')
 
   AssertEqual
-  \ ale#path#Winify(expand('%:p:h:h:h:h') . '/top/ale-special-directory-name-dont-use-this-please/'),
+  \ ale#path#Simplify(expand('%:p:h:h:h:h') . '/top/ale-special-directory-name-dont-use-this-please/'),
   \ ale#path#FindNearestDirectory(bufnr('%'), 'ale-special-directory-name-dont-use-this-please')
 
 Execute(We shouldn't find anything for files which don't match):
diff --git a/test/test_go_to_definition.vader b/test/test_go_to_definition.vader
index 1e0380f..b77a75a 100644
--- a/test/test_go_to_definition.vader
+++ b/test/test_go_to_definition.vader
@@ -70,7 +70,7 @@ Execute(Other files should be jumped to for definition responses):
   \   'success': v:true,
   \   'body': [
   \     {
-  \       'file': ale#path#Winify(g:dir . '/completion_dummy_file'),
+  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
   \       'start': {'line': 3, 'offset': 7},
   \     },
   \   ],
@@ -79,7 +79,7 @@ Execute(Other files should be jumped to for definition responses):
 
   AssertEqual
   \ [
-  \   'edit ' . fnameescape(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \   'edit ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \ ],
   \ g:expr_list
   AssertEqual [3, 7], getpos('.')[1:2]
@@ -95,7 +95,7 @@ Execute(Other files should be jumped to for definition responses in tabs too):
   \   'success': v:true,
   \   'body': [
   \     {
-  \       'file': ale#path#Winify(g:dir . '/completion_dummy_file'),
+  \       'file': ale#path#Simplify(g:dir . '/completion_dummy_file'),
   \       'start': {'line': 3, 'offset': 7},
   \     },
   \   ],
@@ -104,7 +104,7 @@ Execute(Other files should be jumped to for definition responses in tabs too):
 
   AssertEqual
   \ [
-  \   'tabedit ' . fnameescape(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \   'tabedit ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \ ],
   \ g:expr_list
   AssertEqual [3, 7], getpos('.')[1:2]
@@ -150,7 +150,7 @@ Execute(Other files should be jumped to for LSP definition responses):
   \ {
   \   'id': 3,
   \   'result': {
-  \     'uri': ale#path#ToURI(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \     'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \     'range': {
   \       'start': {'line': 2, 'character': 7},
   \     },
@@ -160,7 +160,7 @@ Execute(Other files should be jumped to for LSP definition responses):
 
   AssertEqual
   \ [
-  \   'edit ' . fnameescape(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \   'edit ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \ ],
   \ g:expr_list
   AssertEqual [3, 7], getpos('.')[1:2]
@@ -173,7 +173,7 @@ Execute(Other files should be jumped to in tabs for LSP definition responses):
   \ {
   \   'id': 3,
   \   'result': {
-  \     'uri': ale#path#ToURI(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \     'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \     'range': {
   \       'start': {'line': 2, 'character': 7},
   \     },
@@ -183,7 +183,7 @@ Execute(Other files should be jumped to in tabs for LSP definition responses):
 
   AssertEqual
   \ [
-  \   'tabedit ' . fnameescape(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \   'tabedit ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \ ],
   \ g:expr_list
   AssertEqual [3, 7], getpos('.')[1:2]
@@ -197,13 +197,13 @@ Execute(Definition responses with lists should be handled):
   \   'id': 3,
   \   'result': [
   \     {
-  \       'uri': ale#path#ToURI(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \       'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \       'range': {
   \         'start': {'line': 2, 'character': 7},
   \       },
   \     },
   \     {
-  \       'uri': ale#path#ToURI(ale#path#Winify(g:dir . '/other_file')),
+  \       'uri': ale#path#ToURI(ale#path#Simplify(g:dir . '/other_file')),
   \       'range': {
   \         'start': {'line': 20, 'character': 3},
   \       },
@@ -214,7 +214,7 @@ Execute(Definition responses with lists should be handled):
 
   AssertEqual
   \ [
-  \   'edit ' . fnameescape(ale#path#Winify(g:dir . '/completion_dummy_file')),
+  \   'edit ' . fnameescape(ale#path#Simplify(g:dir . '/completion_dummy_file')),
   \ ],
   \ g:expr_list
   AssertEqual [3, 7], getpos('.')[1:2]
diff --git a/test/test_gradle_build_classpath_command.vader b/test/test_gradle_build_classpath_command.vader
index c31dc69..3c1eceb 100644
--- a/test/test_gradle_build_classpath_command.vader
+++ b/test/test_gradle_build_classpath_command.vader
@@ -10,7 +10,7 @@ Before:
   let g:command_tail = ' -I ' . ale#Escape(ale#gradle#GetInitPath())
   \   . ' -q printClasspath'
 
-  let g:gradle_init_path = ale#path#Winify(g:dir . '../../autoload/ale/gradle/init.gradle')
+  let g:gradle_init_path = ale#path#Simplify(g:dir . '../../autoload/ale/gradle/init.gradle')
 
 After:
   Restore
@@ -25,18 +25,18 @@ Execute(Should return 'gradlew' command if project includes gradle wapper):
   call ale#test#SetFilename('gradle-test-files/wrapped-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ 'cd ' . ale#Escape(ale#path#Winify(g:dir . '/gradle-test-files/wrapped-project'))
-  \   . ' && ' . ale#Escape(ale#path#Winify(g:dir . '/gradle-test-files/wrapped-project/gradlew'))
+  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/gradle-test-files/wrapped-project'))
+  \   . ' && ' . ale#Escape(ale#path#Simplify(g:dir . '/gradle-test-files/wrapped-project/gradlew'))
   \   . g:command_tail,
   \ ale#gradle#BuildClasspathCommand(bufnr(''))
 
 Execute(Should return 'gradle' command if project does not include gradle wapper):
   call ale#test#SetFilename('gradle-test-files/unwrapped-project/src/main/kotlin/dummy.kt')
   let $PATH .= (has('win32') ? ';' : ':')
-  \ . ale#path#Winify(g:dir . '/gradle-test-files')
+  \ . ale#path#Simplify(g:dir . '/gradle-test-files')
 
   AssertEqual
-  \ 'cd ' . ale#Escape(ale#path#Winify(g:dir . '/gradle-test-files/unwrapped-project'))
+  \ 'cd ' . ale#Escape(ale#path#Simplify(g:dir . '/gradle-test-files/unwrapped-project'))
   \   . ' && ' . ale#Escape('gradle')
   \   . g:command_tail,
   \ ale#gradle#BuildClasspathCommand(bufnr(''))
diff --git a/test/test_gradle_find_executable.vader b/test/test_gradle_find_executable.vader
index 054c21a..5daa490 100644
--- a/test/test_gradle_find_executable.vader
+++ b/test/test_gradle_find_executable.vader
@@ -18,12 +18,12 @@ Execute(Should return 'gradlew' if found in parent directory):
   call ale#test#SetFilename('gradle-test-files/wrapped-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/gradle-test-files/wrapped-project/gradlew'),
+  \ ale#path#Simplify(g:dir . '/gradle-test-files/wrapped-project/gradlew'),
   \ ale#gradle#FindExecutable(bufnr(''))
 
 Execute(Should return 'gradle' if 'gradlew' not found in parent directory):
   call ale#test#SetFilename('gradle-test-files/unwrapped-project/src/main/kotlin/dummy.kt')
-  let $PATH .= (has('win32') ? ';': ':') . ale#path#Winify(g:dir . '/gradle-test-files')
+  let $PATH .= (has('win32') ? ';': ':') . ale#path#Simplify(g:dir . '/gradle-test-files')
 
   AssertEqual
   \ 'gradle',
diff --git a/test/test_gradle_find_project_root.vader b/test/test_gradle_find_project_root.vader
index 87af110..8305bba 100644
--- a/test/test_gradle_find_project_root.vader
+++ b/test/test_gradle_find_project_root.vader
@@ -10,21 +10,21 @@ Execute(Should return directory for 'gradlew' if found in parent directory):
   call ale#test#SetFilename('gradle-test-files/wrapped-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/gradle-test-files/wrapped-project'),
+  \ ale#path#Simplify(g:dir . '/gradle-test-files/wrapped-project'),
   \ ale#gradle#FindProjectRoot(bufnr(''))
 
 Execute(Should return directory for 'settings.gradle' if found in parent directory):
   call ale#test#SetFilename('gradle-test-files/settings-gradle-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/gradle-test-files/settings-gradle-project'),
+  \ ale#path#Simplify(g:dir . '/gradle-test-files/settings-gradle-project'),
   \ ale#gradle#FindProjectRoot(bufnr(''))
 
 Execute(Should return directory for 'build.gradle' if found in parent directory):
   call ale#test#SetFilename('gradle-test-files/build-gradle-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/gradle-test-files/build-gradle-project'),
+  \ ale#path#Simplify(g:dir . '/gradle-test-files/build-gradle-project'),
   \ ale#gradle#FindProjectRoot(bufnr(''))
 
 Execute(Should return empty string if gradle files are not found in parent directory):
diff --git a/test/test_list_titles.vader b/test/test_list_titles.vader
index e729541..d521906 100644
--- a/test/test_list_titles.vader
+++ b/test/test_list_titles.vader
@@ -42,7 +42,7 @@ Execute(The loclist titles should be set appropriately):
 
   if !has('nvim')
     AssertEqual
-    \ {'title': ale#path#Winify(getcwd() . '/foo')},
+    \ {'title': ale#path#Simplify(getcwd() . '/foo')},
     \ getloclist(0, {'title': ''})
   endif
 
@@ -72,6 +72,6 @@ Execute(The quickfix titles should be set appropriately):
 
   if !has('nvim')
     AssertEqual
-    \ {'title': ale#path#Winify(getcwd() . '/foo')},
+    \ {'title': ale#path#Simplify(getcwd() . '/foo')},
     \ getqflist({'title': ''})
   endif
diff --git a/test/test_nearest_file_search.vader b/test/test_nearest_file_search.vader
index 63e82da..10d2cb3 100644
--- a/test/test_nearest_file_search.vader
+++ b/test/test_nearest_file_search.vader
@@ -8,7 +8,7 @@ Execute(We should be able to find a configuration file further up):
   call ale#test#SetFilename('top/middle/bottom/dummy.txt')
 
   AssertEqual
-  \ ale#path#Winify(expand('%:p:h:h:h:h') . '/top/example.ini'),
+  \ ale#path#Simplify(expand('%:p:h:h:h:h') . '/top/example.ini'),
   \ ale#path#FindNearestFile(bufnr('%'), 'example.ini')
 
 Execute(We shouldn't find anything for files which don't match):
diff --git a/test/test_path_equality.vader b/test/test_path_equality.vader
index 314a2d9..4ec9bd6 100644
--- a/test/test_path_equality.vader
+++ b/test/test_path_equality.vader
@@ -1,6 +1,6 @@
 Before:
   function! CheckPath(path) abort
-    return ale#path#IsBufferPath(bufnr(''), ale#path#Winify(a:path))
+    return ale#path#IsBufferPath(bufnr(''), ale#path#Simplify(a:path))
   endfunction
 
 After:
diff --git a/test/test_phpcs_executable_detection.vader b/test/test_phpcs_executable_detection.vader
index f51ba9f..020bfac 100644
--- a/test/test_phpcs_executable_detection.vader
+++ b/test/test_phpcs_executable_detection.vader
@@ -19,7 +19,7 @@ Execute(project with phpcs should use local by default):
   call ale#test#SetFilename('phpcs-test-files/project-with-phpcs/foo/test.php')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/phpcs-test-files/project-with-phpcs/vendor/bin/phpcs'),
+  \ ale#path#Simplify(g:dir . '/phpcs-test-files/project-with-phpcs/vendor/bin/phpcs'),
   \ ale_linters#php#phpcs#GetExecutable(bufnr(''))
 
 Execute(use-global should override local detection):
diff --git a/test/test_resolve_local_path.vader b/test/test_resolve_local_path.vader
index 125ae2f..3f0fb20 100644
--- a/test/test_resolve_local_path.vader
+++ b/test/test_resolve_local_path.vader
@@ -8,7 +8,7 @@ Execute(We should be able to find the local version of a file):
   call ale#test#SetFilename('top/middle/bottom/dummy.txt')
 
   AssertEqual
-  \ ale#path#Winify(expand('%:p:h:h:h:h') . '/top/example.ini'),
+  \ ale#path#Simplify(expand('%:p:h:h:h:h') . '/top/example.ini'),
   \ ale#path#ResolveLocalPath(bufnr('%'), 'example.ini', '/global/config.ini')
 
 Execute(We shouldn't find anything for files which don't match):
diff --git a/test/test_sml_command.vader b/test/test_sml_command.vader
index 2db2552..d26f650 100644
--- a/test/test_sml_command.vader
+++ b/test/test_sml_command.vader
@@ -9,14 +9,14 @@ Execute(smlnj finds CM file if it exists):
   call ale#test#SetFilename('smlnj/cm/foo.sml')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/smlnj/cm/sources.cm'),
+  \ ale#path#Simplify(g:dir . '/smlnj/cm/sources.cm'),
   \ ale#handlers#sml#GetCmFile(bufnr('%'))
 
 Execute(smlnj finds CM file by searching upwards):
   call ale#test#SetFilename('smlnj/cm/path/to/bar.sml')
 
   AssertEqual
-  \ ale#path#Winify(g:dir . '/smlnj/cm/sources.cm'),
+  \ ale#path#Simplify(g:dir . '/smlnj/cm/sources.cm'),
   \ ale#handlers#sml#GetCmFile(bufnr('%'))
 
 Execute(smlnj returns '' when no CM file found):
diff --git a/test/test_tflint_config_detection.vader b/test/test_tflint_config_detection.vader
index 65c364e..3500869 100644
--- a/test/test_tflint_config_detection.vader
+++ b/test/test_tflint_config_detection.vader
@@ -12,7 +12,7 @@ Execute(adjacent config file should be found):
   \ (
   \   ale#Escape('tflint')
   \   . ' --config '
-  \   . ale#Escape(ale#path#Winify(g:dir . '/tflint-test-files/foo/.tflint.hcl'))
+  \   . ale#Escape(ale#path#Simplify(g:dir . '/tflint-test-files/foo/.tflint.hcl'))
   \   . ' -f json %t'
   \ ),
   \ ale_linters#terraform#tflint#GetCommand(bufnr(''))