diff --git a/circle.yml b/circle.yml
new file mode 100644
index 000000000..dc818fe12
--- /dev/null
+++ b/circle.yml
@@ -0,0 +1,17 @@
+machine:
+  node:
+    version: 4.0
+  environment:
+    CONTINUOUS_INTEGRATION: true
+
+dependencies:
+  cache_directories:
+    - node_modules
+  override:
+    - npm prune && npm install
+
+test:
+  override:
+    - npm run lint
+    - npm test
+    - npm run test-node
diff --git a/karma.conf.js b/karma.conf.js
index 9134031cd..544c2ea9c 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -5,7 +5,7 @@ module.exports = function (config) {
 
     browsers: ['PhantomJS'],
 
-    singleRun: !!process.env.CONTINUOUS_INTEGRATION,
+    singleRun: !!process.env.CI,
 
     frameworks: [ 'mocha' ],