diff --git a/.nycrc b/.nycrc
deleted file mode 100644
index c271c712af..0000000000
--- a/.nycrc
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "include": ["src/"],
-  "exclude": ["src/polyfills"],
-  "temp-directory": "coverage"
-}
diff --git a/.nycrc.yml b/.nycrc.yml
new file mode 100644
index 0000000000..fdc2fab97e
--- /dev/null
+++ b/.nycrc.yml
@@ -0,0 +1,8 @@
+include:
+  - "src/"
+exclude:
+  - "src/polyfills"
+clean: true
+temp-directory: "coverage"
+skip-full: true
+reporter: [json, html, text]
diff --git a/package.json b/package.json
index 2741c0a9d3..2fd3296f79 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "test": "npm run lint && npm run check && npm run testonly",
     "test:ci": "npm run lint -- --no-cache && npm run check && npm run testonly:cover",
     "testonly": "mocha --full-trace src/**/__tests__/**/*-test.js",
-    "testonly:cover": "nyc --clean --skip-full --reporter json --reporter html --reporter text -- npm run testonly",
+    "testonly:cover": "nyc npm run testonly",
     "lint": "eslint --cache --report-unused-disable-directives src",
     "benchmark": "node ./resources/benchmark.js",
     "prettier": "prettier --write --list-different 'src/**/*.js'",