diff --git a/package.json b/package.json
index 214c6fe..37c1818 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,9 @@
 		"type": "git",
 		"url": "https://github.com/mathiasbynens/String.prototype.startsWith.git"
 	},
+	"directories": {
+		"test": "./tests"
+	},
 	"bugs": "https://github.com/mathiasbynens/String.prototype.startsWith/issues",
 	"scripts": {
 		"pretest": "es-shim-api --bound",