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 09436be..7305f4a 100644
--- a/test/command_callback/test_rails_best_practices_command_callback.vader
+++ b/test/command_callback/test_rails_best_practices_command_callback.vader
@@ -7,36 +7,51 @@ Before:
   call ale#test#SetDirectory('/testplugin/test/command_callback')
   call ale#test#SetFilename('../ruby_fixtures/valid_rails_app/db/test.rb')
 
+  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:suffix = has('win32') ? '; type %t' : ''
+
 After:
   Restore
 
+  unlet! b:args
+  unlet! b:app_path
+  unlet! b:suffix
+
   call ale#test#RestoreDirectory()
 
 Execute(Executable should default to rails_best_practices):
   AssertEqual
-  \ '''rails_best_practices'' --silent -f json --output-file /dev/stdout '
-  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
+  \ ale#Escape('rails_best_practices')
+  \   . ' ' . b:args
+  \   . ' ' . ale#Escape(b:app_path)
+  \   . b:suffix,
   \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))
 
 Execute(Should be able to set a custom executable):
   let g:ale_ruby_rails_best_practices_executable = 'bin/rails_best_practices'
 
   AssertEqual
-  \ '''bin/rails_best_practices'' --silent -f json --output-file /dev/stdout '
-  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
+  \ ale#Escape('bin/rails_best_practices')
+  \   . ' ' . b:args
+  \   . ' ' . ale#Escape(b:app_path)
+  \   . b:suffix,
   \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))
 
 Execute(Setting bundle appends 'exec rails_best_practices'):
   let g:ale_ruby_rails_best_practices_executable = 'path to/bundle'
 
   AssertEqual
-  \ '''path to/bundle'' exec rails_best_practices --silent -f json --output-file /dev/stdout '
-  \   . ale#Escape(simplify(g:dir . '/../ruby_fixtures/valid_rails_app')),
+  \ ale#Escape('path to/bundle') . ' exec rails_best_practices'
+  \   . ' ' . b:args
+  \   . ' ' . ale#Escape(b:app_path)
+  \   . b:suffix,
   \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))
 
 Execute(Command callback should be empty when not in a valid Rails app):
   call ale#test#SetFilename('../ruby_fixtures/not_a_rails_app/test.rb')
 
   AssertEqual
-  \   '',
-  \   ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))
+  \ '',
+  \ ale_linters#ruby#rails_best_practices#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_rubocop_command_callback.vader b/test/command_callback/test_rubocop_command_callback.vader
index a88d453..fddf714 100644
--- a/test/command_callback/test_rubocop_command_callback.vader
+++ b/test/command_callback/test_rubocop_command_callback.vader
@@ -10,24 +10,30 @@ Before:
 After:
   Restore
 
+  call ale#linter#Reset()
   call ale#test#RestoreDirectory()
 
 Execute(Executable should default to rubocop):
   AssertEqual
-  \ '''rubocop'' --format json --force-exclusion  --stdin '
-  \   . ale#Escape(g:dir . '/dummy.rb'),
+  \ ale#Escape('rubocop')
+  \   . ' --format json --force-exclusion  --stdin '
+  \   . ale#Escape(ale#path#Winify(g:dir . '/dummy.rb')),
   \ ale_linters#ruby#rubocop#GetCommand(bufnr(''))
 
 Execute(Should be able to set a custom executable):
   let g:ale_ruby_rubocop_executable = 'bin/rubocop'
+
   AssertEqual
-  \ '''bin/rubocop'' --format json --force-exclusion  --stdin '
-  \   . ale#Escape(g:dir . '/dummy.rb'),
+  \ ale#Escape('bin/rubocop')
+  \   . ' --format json --force-exclusion  --stdin '
+  \   . ale#Escape(ale#path#Winify(g:dir . '/dummy.rb')),
   \ ale_linters#ruby#rubocop#GetCommand(bufnr(''))
 
 Execute(Setting bundle appends 'exec rubocop'):
   let g:ale_ruby_rubocop_executable = 'path to/bundle'
+
   AssertEqual
-  \ '''path to/bundle'' exec rubocop --format json --force-exclusion  --stdin '
-  \   . ale#Escape(g:dir . '/dummy.rb'),
+  \ ale#Escape('path to/bundle') . ' exec rubocop'
+  \   . ' --format json --force-exclusion  --stdin '
+  \   . ale#Escape(ale#path#Winify(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 76e6992..b01f8f0 100644
--- a/test/command_callback/test_rust_rls_callbacks.vader
+++ b/test/command_callback/test_rust_rls_callbacks.vader
@@ -28,5 +28,5 @@ Execute(The project root should be detected correctly):
   call ale#test#SetFilename('rust-rls-project/test.rs')
 
   AssertEqual
-  \ g:dir . '/rust-rls-project',
+  \ ale#path#Winify(g:dir . '/rust-rls-project'),
   \ ale_linters#rust#rls#GetProjectRoot(bufnr(''))
diff --git a/test/command_callback/test_scalastyle_command_callback.vader b/test/command_callback/test_scalastyle_command_callback.vader
index f051b02..953d57b 100644
--- a/test/command_callback/test_scalastyle_command_callback.vader
+++ b/test/command_callback/test_scalastyle_command_callback.vader
@@ -1,10 +1,16 @@
 Before:
+  Save g:ale_scala_scalastyle_options
+  Save g:ale_scalastyle_config_loc
+
+  unlet! g:ale_scala_scalastyle_options
+  unlet! g:ale_scalastyle_config_loc
+
   runtime ale_linters/scala/scalastyle.vim
 
 After:
+  Restore
+
   call ale#linter#Reset()
-  let g:ale_scala_scalastyle_options = ''
-  let g:ale_scalastyle_conf_loc = ''
 
 Execute(Should return the correct default command):
   AssertEqual
@@ -15,13 +21,16 @@ Execute(Should allow using a custom config file):
   let g:ale_scalastyle_config_loc = '/dooper/config.xml'
 
   AssertEqual
-  \   'scalastyle --config ''/dooper/config.xml'' %t',
+  \   'scalastyle'
+  \     . ' --config ' . ale#Escape('/dooper/config.xml')
+  \     . ' %t',
   \   ale_linters#scala#scalastyle#GetCommand(bufnr(''))
 
 Execute(Should allow using custom options):
   let g:ale_scala_scalastyle_options = '--warnings false --quiet true'
 
   AssertEqual
-  \   'scalastyle --config ''/dooper/config.xml'' --warnings false --quiet true %t',
+  \   'scalastyle'
+  \     . ' --warnings false --quiet true'
+  \     . ' %t',
   \   ale_linters#scala#scalastyle#GetCommand(bufnr(''))
-
diff --git a/test/command_callback/test_slimlint_command_callback.vader b/test/command_callback/test_slimlint_command_callback.vader
index 98fd9a8..d4dad4c 100644
--- a/test/command_callback/test_slimlint_command_callback.vader
+++ b/test/command_callback/test_slimlint_command_callback.vader
@@ -9,8 +9,7 @@ After:
   Restore
 
   unlet! g:default_command
-
-  let g:ale_has_override = {}
+  unlet! b:conf
 
   call ale#linter#Reset()
   call ale#test#RestoreDirectory()
@@ -21,15 +20,20 @@ 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')
 
-  AssertEqual
-  \ 'SLIM_LINT_RUBOCOP_CONF=''/testplugin/test/slimlint-test-files/.rubocop.yml'' ' . g:default_command,
-  \ ale_linters#slim#slimlint#GetCommand(bufnr(''))
+  let b:conf = ale#path#Winify(g:dir . '/../slimlint-test-files/.rubocop.yml')
 
-Execute(The command should have the .rubocop.yml prepended as an env var if one exists on win32):
-  call ale#test#SetFilename('../slimlint-test-files/subdir/file.slim')
-
-  let g:ale_has_override['win32'] = 1
-
-  AssertEqual
-  \ 'set SLIM_LINT_RUBOCOP_CONF=''/testplugin/test/slimlint-test-files/.rubocop.yml'' && ' . g:default_command,
-  \ ale_linters#slim#slimlint#GetCommand(bufnr(''))
+  if has('win32')
+    " Windows uses 'set var=... && command'
+    AssertEqual
+    \ 'set SLIM_LINT_RUBOCOP_CONF='
+    \   . ale#Escape(b:conf)
+    \   .  ' && ' . g:default_command,
+    \ ale_linters#slim#slimlint#GetCommand(bufnr(''))
+  else
+    " Unix uses 'var=... command'
+    AssertEqual
+    \ 'SLIM_LINT_RUBOCOP_CONF='
+    \   . ale#Escape(b:conf)
+    \   .  ' ' . g:default_command,
+    \ ale_linters#slim#slimlint#GetCommand(bufnr(''))
+  endif
diff --git a/test/command_callback/test_standard_command_callback.vader b/test/command_callback/test_standard_command_callback.vader
index 193ead8..279109e 100644
--- a/test/command_callback/test_standard_command_callback.vader
+++ b/test/command_callback/test_standard_command_callback.vader
@@ -19,8 +19,6 @@ After:
 
   unlet! b:executable
 
-  let g:ale_has_override = {}
-
   call ale#test#SetFilename('test.txt')
 
   call ale#test#RestoreDirectory()
@@ -29,45 +27,36 @@ After:
 Execute(bin/cmd.js paths should be preferred):
   call ale#test#SetFilename('standard-test-files/with-cmd/testfile.js')
 
-  let b:executable = g:dir
-  \ . '/standard-test-files/with-cmd/node_modules/standard/bin/cmd.js'
+  let b:executable = ale#path#Winify(
+  \   g:dir
+  \   . '/standard-test-files/with-cmd/node_modules/standard/bin/cmd.js'
+  \)
 
   AssertEqual
   \ b:executable,
   \ ale_linters#javascript#standard#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ ale#Escape(b:executable) . ' --stdin %s',
+  \ (has('win32') ? 'node.exe ' : '')
+  \   . ale#Escape(b:executable)
+  \   . ' --stdin %s',
   \ ale_linters#javascript#standard#GetCommand(bufnr(''))
 
 Execute(.bin directories should be used too):
   call ale#test#SetFilename('standard-test-files/with-bin/testfile.js')
 
-  let b:executable = g:dir
-  \ . '/standard-test-files/with-bin/node_modules/.bin/standard'
+  let b:executable = ale#path#Winify(
+  \   g:dir
+  \   . '/standard-test-files/with-bin/node_modules/.bin/standard'
+  \)
 
   AssertEqual
   \ b:executable,
   \ ale_linters#javascript#standard#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ ale#Escape(b:executable) . ' --stdin %s',
-  \ ale_linters#javascript#standard#GetCommand(bufnr(''))
-
-Execute(.js files should be executed with node on Windows):
-  let g:ale_has_override['win32'] = 1
-
-  call ale#test#SetFilename('standard-test-files/with-cmd/testfile.js')
-
-  let b:executable = g:dir
-  \ . '/standard-test-files/with-cmd/node_modules/standard/bin/cmd.js'
-
-  AssertEqual
-  \ b:executable,
-  \ ale_linters#javascript#standard#GetExecutable(bufnr(''))
-
-  AssertEqual
-  \ ale#Escape('node.exe') . ' ' . ale#Escape(b:executable) . ' --stdin %s',
+  \ ale#Escape(b:executable)
+  \   . ' --stdin %s',
   \ ale_linters#javascript#standard#GetCommand(bufnr(''))
 
 Execute(The global executable should be used otherwise):
diff --git a/test/command_callback/test_swaglint_command_callback.vader b/test/command_callback/test_swaglint_command_callback.vader
index 5d04e92..379aa0c 100644
--- a/test/command_callback/test_swaglint_command_callback.vader
+++ b/test/command_callback/test_swaglint_command_callback.vader
@@ -30,7 +30,12 @@ Execute(The yaml swaglint command callback should allow a global installation to
 
 Execute(The yaml swaglint command callback should allow a local installation to be used):
   call ale#test#SetFilename('swaglint_paths/docs/swagger.yaml')
-  AssertEqual g:dir . '/swaglint_paths/node_modules/.bin/swaglint',
+
+  AssertEqual
+  \ ale#path#Winify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint'),
   \ ale_linters#yaml#swaglint#GetExecutable(bufnr(''))
-  AssertEqual g:dir . '/swaglint_paths/node_modules/.bin/swaglint -r compact --stdin',
+
+  AssertEqual
+  \ ale#path#Winify(g:dir . '/swaglint_paths/node_modules/.bin/swaglint')
+  \   . ' -r compact --stdin',
   \ ale_linters#yaml#swaglint#GetCommand(bufnr(''))
diff --git a/test/command_callback/test_thrift_command_callback.vader b/test/command_callback/test_thrift_command_callback.vader
index 43487f4..6700891 100644
--- a/test/command_callback/test_thrift_command_callback.vader
+++ b/test/command_callback/test_thrift_command_callback.vader
@@ -11,9 +11,17 @@ Before:
 
   function! GetCommand(buffer) abort
     call ale#engine#InitBufferInfo(a:buffer)
-    let l:result = ale_linters#thrift#thrift#GetCommand(a:buffer)
+    let l:command = ale_linters#thrift#thrift#GetCommand(a:buffer)
     call ale#engine#Cleanup(a:buffer)
-    return l:result
+
+    let l:split_command = split(l:command)
+    let l:index = index(l:split_command, '-out')
+
+    if l:index >= 0
+      let l:split_command[l:index + 1] = 'TEMP'
+    endif
+
+    return join(l:split_command)
   endfunction
 
   runtime ale_linters/thrift/thrift.vim
@@ -34,28 +42,43 @@ Execute(The executable should be configurable):
   AssertEqual 'foobar', ale_linters#thrift#thrift#GetExecutable(bufnr(''))
 
 Execute(The executable should be used in the command):
-  Assert GetCommand(bufnr('%')) =~# "^'thrift'"
+  AssertEqual
+  \ ale#Escape('thrift') . ' --gen cpp -strict -out TEMP %t',
+  \ GetCommand(bufnr('%'))
 
   let b:ale_thrift_thrift_executable = 'foobar'
-  Assert GetCommand(bufnr('%')) =~# "^'foobar'"
+  AssertEqual
+  \ ale#Escape('foobar') . ' --gen cpp -strict -out TEMP %t',
+  \ GetCommand(bufnr('%'))
 
 Execute(The list of generators should be configurable):
-  Assert GetCommand(bufnr('%')) =~# '--gen cpp'
-
   let b:ale_thrift_thrift_generators = ['java', 'py:dynamic']
-  Assert GetCommand(bufnr('%')) =~# '--gen java --gen py:dynamic'
+
+  AssertEqual
+  \ ale#Escape('thrift') . ' --gen java --gen py:dynamic -strict -out TEMP %t',
+  \ GetCommand(bufnr('%'))
 
   let b:ale_thrift_thrift_generators = []
-  Assert GetCommand(bufnr('%')) =~# '--gen cpp'
+
+  AssertEqual
+  \ ale#Escape('thrift') . ' --gen cpp -strict -out TEMP %t',
+  \ GetCommand(bufnr('%'))
 
 Execute(The list of include paths should be configurable):
-  Assert GetCommand(bufnr('%')) !~# '-I'
-
   let b:ale_thrift_thrift_includes = ['included/path']
-  Assert GetCommand(bufnr('%')) =~# '-I included/path'
+
+  AssertEqual
+  \ ale#Escape('thrift')
+  \   . ' --gen cpp'
+  \   . ' -I included/path'
+  \   . ' -strict -out TEMP %t',
+  \ GetCommand(bufnr('%'))
 
 Execute(The string of compiler options should be configurable):
-  Assert GetCommand(bufnr('%')) =~# '-strict'
-
   let b:ale_thrift_thrift_options = '-strict --allow-64bit-consts'
-  Assert GetCommand(bufnr('%')) =~# '-strict --allow-64bit-consts'
+
+  AssertEqual
+  \ ale#Escape('thrift')
+  \   . ' --gen cpp -strict --allow-64bit-consts'
+  \   . ' -out TEMP %t',
+  \ GetCommand(bufnr('%'))