diff --git a/.babelrc b/.babelrc
new file mode 100644
index 0000000..c13c5f6
--- /dev/null
+++ b/.babelrc
@@ -0,0 +1,3 @@
+{
+  "presets": ["es2015"]
+}
diff --git a/MiniBase.js b/MiniBase.js
index 5048002..6b70e3a 100644
--- a/MiniBase.js
+++ b/MiniBase.js
@@ -24,7 +24,7 @@
  */
 'use strict';
 
-import { $A } from 'miniprototype.js';
+import { $A } from './miniprototype.js';
 
 // Non-Lively Compatibility
 export var Global = {};
diff --git a/package.json b/package.json
index 7a7342e..e48dfbd 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,9 @@
     "test": "tests"
   },
   "scripts": {
-    "test": "karma start --single-run",
+    "test": "npm run test-node && npm run test-karma",
+    "test-karma": "karma start --single-run",
+    "test-node": "mocha tests --compilers js:babel-core/register --require tests/globalChai.js",
     "test-chrome-only": "karma start --single-run --browsers Chrome",
     "test-continuously": "karma start",
     "test-continuously-chrome-only": "karma start --browsers Chrome",
diff --git a/tests/LayerInliningTests.js b/tests/LayerInliningTests.js
index 2db78cf..9a9528a 100644
--- a/tests/LayerInliningTests.js
+++ b/tests/LayerInliningTests.js
@@ -1,6 +1,7 @@
 'use strict';
 
-import { default as cop } from 'copv2/Layers.js';
+import { default as cop } from '../copv2/Layers.js';
+import '../MiniBase.js'
 
 cop.tests = {};
 cop.tests.LayerInliningTests = {};
diff --git a/tests/LayerTests.js b/tests/LayerTests.js
index 59a1e5d..147ec95 100644
--- a/tests/LayerTests.js
+++ b/tests/LayerTests.js
@@ -23,7 +23,7 @@
  */
 'use strict';
 
-import { default as cop, Layer, LayerableObject, Global } from 'copv2/Layers.js';
+import { default as cop, Layer, LayerableObject, Global } from '../copv2/Layers.js';
 
 // COP Example from: Hirschfeld, Costanza, Nierstrasz. 2008.
 // Context-oriented Programming. JOT)
@@ -827,9 +827,11 @@ describe('cop', function () {
                     .refineObject(o, { say: function(a) {return cop.proceed(a + " World") + "!"}})
             assert.equal(o.say("Hello"), "Say: Hello", "test is broken");
             cop.withLayers([l], function() {
-                console.group("SayHello");
+                if (typeof console.group !== 'undefined')
+                    console.group("SayHello");
                 var result = o.say("Hello")
-                console.groupEnd("SayHello");
+                if (typeof console.group !== 'undefined')
+                    console.groupEnd("SayHello");
                 assert.equal(result, "Say: Hello World!", "adapting arguments is broken");
             }.bind(this));
         });
diff --git a/tests/TracingTests.js b/tests/TracingTests.js
index 8bdddf8..177736c 100644
--- a/tests/TracingTests.js
+++ b/tests/TracingTests.js
@@ -1,4 +1,4 @@
-import { default as cop } from 'copv2/Layers';
+import { default as cop } from '../copv2/Layers';
 
 function TestCase() {}; // TODO: get rid of this
 TestCase.subclass('cop.tests.TracingTests.TracerTest',
diff --git a/tests/globalChai.js b/tests/globalChai.js
new file mode 100644
index 0000000..03e17ad
--- /dev/null
+++ b/tests/globalChai.js
@@ -0,0 +1,3 @@
+// only to be run with node (or rather mocha), not in a browser
+
+global.chai = require('chai');