diff --git a/Doxyfile b/Doxyfile
index cbc2586..f998de5 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -668,7 +668,7 @@ WARN_LOGFILE           =
 # directories like "/usr/src/myproject". Separate the files or directories
 # with spaces.
 
-INPUT                  = src/
+INPUT                  = src/ src/test/
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding, which is
diff --git a/src/test/cunit.c b/src/test/cunit.c
index 6d96b8a..b8a4f29 100644
--- a/src/test/cunit.c
+++ b/src/test/cunit.c
@@ -16,6 +16,12 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @file cunit.c
+ * Main cunit file, registering the test suites.
+ * @brief test suite registration
+ */
+
 #include "cunit.h"
 
 #include <CUnit/Basic.h>
diff --git a/src/test/cunit.h b/src/test/cunit.h
index 06e1c29..18922d0 100644
--- a/src/test/cunit.h
+++ b/src/test/cunit.h
@@ -16,6 +16,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @file cunit.h
+ * Main cunit header, containing declarations
+ * of all test functions.
+ * @brief test function declarations
+ */
+
 /*
  * filereader tests
  */
diff --git a/src/test/cunit_filereader.c b/src/test/cunit_filereader.c
index ff3a6fe..a196a70 100644
--- a/src/test/cunit_filereader.c
+++ b/src/test/cunit_filereader.c
@@ -16,6 +16,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @file cunit_filereader.c
+ * Test functions for the filereader,
+ * including various file formats.
+ * @brief file reader test functions
+ */
+
 #include "filereader.h"
 #include "half_edge.h"
 
diff --git a/src/test/cunit_half_edge.c b/src/test/cunit_half_edge.c
index dc1590b..89ca3c1 100644
--- a/src/test/cunit_half_edge.c
+++ b/src/test/cunit_half_edge.c
@@ -16,6 +16,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @file cunit_half_edge.c
+ * Test functions for the half edge data structure
+ * and operations based on it.
+ * @brief half-edge test functions
+ */
+
 #include "half_edge.h"
 
 #include <CUnit/Basic.h>
diff --git a/src/test/cunit_vector.c b/src/test/cunit_vector.c
index 8668f55..24fb6f5 100644
--- a/src/test/cunit_vector.c
+++ b/src/test/cunit_vector.c
@@ -16,6 +16,13 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+/**
+ * @file cunit_vector.c
+ * Test functions for the vector data structure
+ * and operations based on it.
+ * @brief vector test functions
+ */
+
 #include "vector.h"
 
 #include <CUnit/Basic.h>