diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 0000000..404abb2
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1 @@
+coverage/
diff --git a/.nycrc b/.nycrc
new file mode 100644
index 0000000..1826526
--- /dev/null
+++ b/.nycrc
@@ -0,0 +1,13 @@
+{
+	"all": true,
+	"check-coverage": false,
+	"reporter": ["text-summary", "text", "html", "json"],
+	"lines": 86,
+	"statements": 85.93,
+	"functions": 82.43,
+	"branches": 76.06,
+	"exclude": [
+		"coverage",
+		"test"
+	]
+}
diff --git a/package.json b/package.json
index 3916089..57acbd9 100644
--- a/package.json
+++ b/package.json
@@ -9,8 +9,8 @@
 		"prepublish": "safe-publish-latest",
 		"pretest": "npm run lint",
 		"lint": "eslint .",
-		"tests-only": "node test",
-		"posttests-only": "node -e \"require('es5-shim'); require('es6-shim'); require('./test');\"",
+		"tests-only": "nyc tape 'test/**/*.js'",
+		"tests:shims": "nyc tape --require=es5-shim --require=es5-shim 'test/**/*.js'",
 		"test": "npm run tests-only",
 		"posttest": "npx aud --production"
 	},
@@ -44,6 +44,7 @@
 		"es6-shim": "^0.35.5",
 		"eslint": "^6.8.0",
 		"for-each": "^0.3.3",
+		"nyc": "^10.3.2",
 		"object-inspect": "^1.7.0",
 		"safe-publish-latest": "^1.1.4",
 		"tape": "^5.0.0-next.5"