diff --git a/tests/Makefile.am b/tests/Makefile.am
index 45dc5a1c6..97d9cb434 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -220,7 +220,7 @@ MODFILES = \
 	optimizers/fs2000_101.mod \
 	optimizers/fs2000_102.mod \
 	optimizers/fs2000_w.mod \
-	differentiate_forward_vars/RBC_differentiate_forward.mod \ 
+	differentiate_forward_vars/RBC_differentiate_forward.mod \
 	reporting/example1.mod
 
 XFAIL_MODFILES = ramst_xfail.mod \