diff --git a/sys-block/mbuffer/mbuffer-20170921.ebuild b/sys-block/mbuffer/mbuffer-20170921.ebuild
index 3baf4645d8fab..2870b2b50535a 100644
--- a/sys-block/mbuffer/mbuffer-20170921.ebuild
+++ b/sys-block/mbuffer/mbuffer-20170921.ebuild
@@ -45,6 +45,8 @@ src_test() {
 		ewarn "test suite would hang forever in such environments!"
 		return 0;
 	fi
+
+	default
 }
 
 pkg_postinst() {