diff --git a/package.json b/package.json
index eef62c5..a543c23 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "preversion": "npm t",
     "postversion": "npm publish && git push --follow-tags",
     "pretest": "standard lib test *.js",
-    "test": "nyc -- tap test/*.js",
+    "test": "nyc -- tap -J test/*.js",
     "update-coc": "weallbehave -o . && git add CODE_OF_CONDUCT.md && git commit -m 'docs(coc): updated CODE_OF_CONDUCT.md'",
     "update-contrib": "weallcontribute -o . && git add CONTRIBUTING.md && git commit -m 'docs(contributing): updated CONTRIBUTING.md'"
   },