diff --git a/package.json b/package.json
index 98c2aa8d..0231570b 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
   },
   "main": "index.js",
   "scripts": {
-    "test": "./support/nodeunit/bin/nodeunit test/*_test.js"
+    "test": "ONLY=memory ./support/nodeunit/bin/nodeunit test/*_test.*"
   },
   "engines": [
     "node >= 0.4.0"
diff --git a/test/spec_helper.js b/test/spec_helper.js
index b5ca20c1..e103306c 100644
--- a/test/spec_helper.js
+++ b/test/spec_helper.js
@@ -48,7 +48,7 @@ function check_external_exports() {
 
 // add assertions
 
-var assert = require(require('module')._resolveFilename('nodeunit')[0].replace(/index\.js$/, 'lib/assert'));
+var assert = require(require('module')._resolveFilename('../support/nodeunit')[0].replace(/index\.js$/, 'lib/assert'));
 
 // Check response status code 200 OK
 assert.status200 = function (response, message) {