diff --git a/package.json b/package.json
index d2331a34..80570e49 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
   "scripts": {
     "build": "node_modules/.bin/gulp",
     "pretest": "node_modules/.bin/gulp concat-sjcl",
-    "test": "./node_modules/.bin/istanbul test -x build/sjcl.js -x src/js/jsbn/* ./node_modules/mocha/bin/mocha -- --reporter spec test/*-test.js",
+    "test": "./node_modules/.bin/istanbul test -x build/sjcl.js -x src/js/jsbn/* ./node_modules/mocha/bin/_mocha -- --reporter spec test/*-test.js",
     "coveralls": "cat ./coverage/lcov.info | ./node_modules/.bin/coveralls"
   },
   "repository": {