diff --git a/doxygen.config b/doxygen.config
index 7a21434c2..384d563c0 100644
--- a/doxygen.config
+++ b/doxygen.config
@@ -630,12 +630,8 @@ WARN_LOGFILE           =
 # with spaces.
 
 INPUT                  = doxygen-mainpage \
-		         include \
+                         include \
                          src \
-                         test_c \
-                         test_regress \
-                         test_sc \
-                         test_v
 
 # 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