diff --git a/.gitignore b/.gitignore
index ad79ef3a..f8cadc4b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 .idea
 tmp
 node_modules
+coverage
+
diff --git a/.npmignore b/.npmignore
index 0a8ef41d..86b2fe5c 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,4 +1,5 @@
 .idea
 tmp
 node_modules
+coverage
 __tests__
diff --git a/package.json b/package.json
index 659cff7c..fde09616 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,9 @@
     "testPathDirs": [
       "<rootDir>/src"
     ],
+    "collectCoverageOnlyFrom": {
+      "src/index.js": true
+    },
     "unmockedModulePathPatterns": [],
     "verbose": true
   },