Fix test:coverage npm task

Author: kunalkapadia

package.json

@@ -19,7 +19,7 @@
     "precommit": "yarn lint && yarn test",
     "test": "cross-env NODE_ENV=test ./node_modules/.bin/mocha --ui bdd --reporter spec --colors --compilers js:babel-core/register server --recursive",
     "test:watch": "yarn test -- --watch",
-    "test:coverage": "cross-env NODE_ENV=test ./node_modules/.bin/istanbul cover _mocha -- --ui bdd --reporter spec --colors --compilers js:babel-core/register server/tests --recursive",
+    "test:coverage": "cross-env NODE_ENV=test ./node_modules/.bin/istanbul cover _mocha -- --ui bdd --reporter spec --colors --compilers js:babel-core/register server --recursive",
     "test:check-coverage": "yarn test:coverage && istanbul check-coverage",
     "report-coverage": "coveralls < ./coverage/lcov.info"
   },