diff --git a/package.json b/package.json
index dc2a379..fe10df5 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "lint": "standard",
     "lint:fix": "standard --fix",
     "test": "npm run test:unit && npm run test:typescript",
-    "test:unit": "c8 node --test",
+    "test:unit": "c8 --100 node --test",
     "test:typescript": "tsd"
   },
   "repository": {