diff --git a/package.json b/package.json
index 1098785..c8b04c6 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "test": "./node_modules/.bin/mocha -C test/*.js",
-    "coverage": "./node_modules/.bin/istanbul cover _mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/.bin/codacy-coverage && rm -rf ./coverage"
+    "coverage": "./node_modules/.bin/istanbul cover '**/test/**' _mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/.bin/codacy-coverage && rm -rf ./coverage"
   },
   "repository": {
     "type": "git",