diff --git a/tests/Makefile.am b/tests/Makefile.am
index 4b59190..cd11420 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -56,5 +56,5 @@
   tests/sequence.miff \
 	$(TESTS_TESTS)
 
-TESTS_CLEANFILES = 
+TESTS_CLEANFILES = \
 	tests/*_out.*