diff --git a/Makefile b/Makefile
index d2a7633..c8d71cb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,3 @@
 .PHONY: test
 test:
-	find . -mindepth 1 -maxdepth 1 -not -path '*/.*' -type d | xargs make -C {} test
+	 find . -mindepth 1 -maxdepth 1 -not -path '*/.*' -type d -exec make -C {} test \;