diff --git a/tests/Composer/Test/Mock/ProcessExecutorMock.php b/tests/Composer/Test/Mock/ProcessExecutorMock.php
new file mode 100644
index 000000000..13ea9792b
--- /dev/null
+++ b/tests/Composer/Test/Mock/ProcessExecutorMock.php
@@ -0,0 +1,31 @@
+<?php
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\Mock;
+
+use Composer\Util\ProcessExecutor;
+
+class ProcessExecutorMock extends ProcessExecutor
+{
+    private $execute;
+
+    public function __construct(\Closure $execute)
+    {
+        $this->execute = $execute;
+    }
+
+    public function execute($command, &$output = null, $cwd = null)
+    {
+        $execute = $this->execute;
+
+        return $execute($command, $output, $cwd);
+    }
+}