increase coverage

package.json

@@ -56,7 +56,7 @@
     "add-license": "./node_modules/.bin/uber-licence",
     "check-license": "./node_modules/.bin/uber-licence --dry",
     "check-ls": "npm ls --loglevel=http --parseable 1>/dev/null && echo '# npm is in a good state'",
-    "cover": "babel-node ./node_modules/.bin/babel-istanbul cover ./node_modules/.bin/_mocha -- test/ test/samplers/",
+    "cover": "babel-node ./node_modules/.bin/babel-istanbul cover ./node_modules/.bin/_mocha -- test/ test/samplers/ test/baggage/",
     "coveralls": "cat ./coverage/lcov.info | coveralls",
     "flow": "flow",
     "lint": "eslint $(ls src/ | grep '.js$') && echo '# linter passed'",