diff --git a/.eslintignore b/.eslintignore
new file mode 100644
index 00000000..404abb22
--- /dev/null
+++ b/.eslintignore
@@ -0,0 +1 @@
+coverage/
diff --git a/.gitignore b/.gitignore
index 77f05fa4..1e3b179d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,7 @@
 # Only apps should have lockfiles
 yarn.lock
 package-lock.json
+
+# coverage data
+coverage/
+.nyc_output/
diff --git a/.nycrc b/.nycrc
new file mode 100644
index 00000000..1826526e
--- /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 fa5989d9..b2781e12 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
         "lint": "eslint . bin/*",
         "pretest": "npm run lint",
         "test": "npm run tests-only",
-        "tests-only": "tap test/*.js"
+        "tests-only": "nyc tap test/*.js"
     },
     "testling": {
         "files": "test/browser/*.js",