diff --git a/Doxyfile b/Doxyfile
index 91492c1..65c1f2e 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -991,7 +991,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = src
+INPUT                  = src tests
 
 # This tag can be used to specify the character encoding of the source files
 # that Doxygen parses. Internally Doxygen uses the UTF-8 encoding. Doxygen uses