diff --git a/dune/solvers/test/Makefile.am b/dune/solvers/test/Makefile.am
index ef21ca4978f71213e27fa7f09223282d23513294..4125ec12895c3cffd539092ff5542e061bd7f979 100644
--- a/dune/solvers/test/Makefile.am
+++ b/dune/solvers/test/Makefile.am
@@ -74,4 +74,6 @@ sumoperatortest_CPPFLAGS = $(COMMON_CPPFLAGS) $(GRID_CPPFLAGS)
 sumoperatortest_LDADD = $(COMMON_LDADD) $(GRID_LDADD)
 sumoperatortest_LDFLAGS = $(COMMON_LDFLAGS) $(GRID_LDFLAGS)
 
+CLEANFILES = *.vtu *.vtp
+
 include $(top_srcdir)/am/global-rules