diff --git a/Makefile b/Makefile
index a163b5e3f..7d4c08a71 100644
--- a/Makefile
+++ b/Makefile
@@ -701,6 +701,9 @@ ocamlbuild-partial-boot: ocamlc otherlibraries
 
 partialclean::
 	rm -rf _build
+	if test -d test; then \
+	 (cd test; $(MAKE) clean); \
+	fi
 
 # Check that the stack limit is reasonable.