diff --git a/circle.yml b/circle.yml
index 16a8e741..da0e7bb1 100644
--- a/circle.yml
+++ b/circle.yml
@@ -5,14 +5,19 @@ machine:
     version: 5.6.14
   ruby:
     version: 2.2.2
+  python:
+    version: pypy-2.2.1
 
 dependencies:
   override:
+    - npm install
     - composer install --prefer-source --no-interaction
     - gem install bundler -v 1.10.6
 
 test:
   override:
+    - npm run build
     - npm test
     - phpunit test/platform.php.test.php
     - ruby test/platform.ruby.test.rb
+    - python test/platform.python.test.py
diff --git a/test/platform.php.test.php b/test/platform.php.test.php
index fecb241a..1a2f93c5 100644
--- a/test/platform.php.test.php
+++ b/test/platform.php.test.php
@@ -2,7 +2,7 @@
 # Run tests from the repository root directory:
 # $ composer install && ./vendor/bin/phpunit test/platform.php.test.php
 
-require(__DIR__.'/../platform/php/mailchecker.php');
+require(__DIR__.'/../platform/php/MailChecker.php');
 
 class MailCheckerTest extends PHPUnit_Framework_TestCase
 {