diff --git a/npm b/npm
new file mode 100755
index 0000000..f4d7b9f
--- /dev/null
+++ b/npm
@@ -0,0 +1,14 @@
+#!/bin/bash
+# Use as alternative to npm to run in local node.js environment
+# REQUIRES python3, else falls back to system-wide npm
+
+set -e
+
+which python3 > /dev/null 2>&1 || ( npm "$@" && exit 0 )
+
+dir=$(dirname $0)
+
+test -x "${dir}/.env/bin/nodeenv" || ( virtualenv -p python3 "${dir}/.env" && "${dir}/.env/bin/pip" install --upgrade nodeenv )
+test -f "${dir}/.env/node/bin/activate" || "${dir}/.env/bin/nodeenv" --node=latest --force "${dir}/.env/node"
+PATH="${dir}/.env/node/bin:${PATH}" npm "$@"
+
diff --git a/package.json b/package.json
index e241d61..a392294 100644
--- a/package.json
+++ b/package.json
@@ -6,8 +6,8 @@
   "scripts": {
     "deps": "bower install && typings install",
     "build": "tsc -p .",
-    "test": "jasmine",
-    "build-test": "tsc -p . && jasmine",
+    "test": "karma start spec/support/karma.conf.js",
+    "build-test": "npm run build && npm run test",
     "cover": "istanbul cover node_modules/jasmine/bin/jasmine.js && remap-istanbul -i coverage/coverage.json -o coverage -t html",
     "serve": "simple-server out 8012"
   },
@@ -21,9 +21,12 @@
     "bower": "~1.8",
     "istanbul": "~0.4",
     "jasmine": "~2.5",
+    "karma": "~1.3",
+    "karma-jasmine": "~1.1",
+    "karma-phantomjs-launcher": "~1.0",
     "remap-istanbul": "~0.6",
     "simple-server": "~1.0",
     "typescript": "~2.1",
     "typings": "~1.4"
   }
-}
+}
\ No newline at end of file
diff --git a/spec/support/karma.conf.js b/spec/support/karma.conf.js
new file mode 100644
index 0000000..e638815
--- /dev/null
+++ b/spec/support/karma.conf.js
@@ -0,0 +1,16 @@
+// karma.conf.js
+module.exports = function(config) {
+  config.set({
+    basePath: '../..',
+    frameworks: ['jasmine'],
+    singleRun: true,
+    browsers: ['PhantomJS'],
+    reporters: ['dots'],
+    logLevel: config.LOG_WARN,
+
+    files: [
+      'out/vendor/phaser/build/phaser.js',
+      'out/build.js'
+    ]
+  })
+}
\ No newline at end of file