diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 775c589ac3c0a24f470a8f53ae52f6c82cc17193..959273c3a52e10f5895735b047a3de389e4f161a 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -51,8 +51,12 @@ endef
 emit_tests:
 	$(EMIT_TESTS)
 
-clean:
+define CLEAN
 	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
+endef
+
+clean:
+	$(CLEAN)
 
 $(OUTPUT)/%:%.c
 	$(LINK.c) $^ $(LDLIBS) -o $@