diff --git a/Tests/GitRevision/GitRevsionTest.php b/Tests/GitRevision/GitRevsionTest.php
new file mode 100644
index 0000000..82c62a9
--- /dev/null
+++ b/Tests/GitRevision/GitRevsionTest.php
@@ -0,0 +1,78 @@
+<?php
+
+namespace Troopers\MetricsBundle\Tests\GitRevsion;
+
+use Troopers\MetricsBundle\Monolog\Processor\GitProcessor;
+
+class GitRevsionTest extends \PHPUnit_Framework_TestCase
+{
+    static $defaultPath = '/tmp';
+
+    /**
+     * @before
+     */
+    public function before(){
+        chdir(self::$defaultPath);
+        if (file_exists('REVISION')) {
+            unlink('REVISION');
+        }
+    }
+
+    /**
+     * @after
+     */
+    public function after() {
+        GitProcessor::clearCache();
+    }
+
+    public function testGitFieldIsAdded()
+    {
+        $rootPath = self::$defaultPath;
+
+        $gitProcessor = new GitProcessor($rootPath);
+        $record = $gitProcessor([]);
+
+        $this->assertArrayHasKey('extra', $record);
+        $this->assertArrayHasKey('@git', $record['extra']);
+
+        $this->assertEquals(null, $record['extra']['@git']);
+    }
+
+    public function testGitRevisionWithGit()
+    {
+        $rootPath = __DIR__;
+        chdir($rootPath);
+        $gitProcessor = new GitProcessor($rootPath);
+        $record = $gitProcessor([]);
+
+        $this->assertRegExp("/^[0-9a-f]{40}|[0-9a-f]{6,8}$/", $record['extra']['@git']);
+    }
+
+    public function testGitRevisionWithBadRevisionFile()
+    {
+        $rootPath = self::$defaultPath;
+
+        $revisionFile = fopen('REVISION', 'w');
+        fputs($revisionFile, 'This is not a git commit sha');
+        fclose($revisionFile);
+
+        $gitProcessor = new GitProcessor($rootPath);
+        $record = $gitProcessor([]);
+
+        $this->assertEquals(null, $record['extra']['@git']);
+    }
+
+    public function testGitRevisionWithGoodRevisionFile()
+    {
+        $rootPath = self::$defaultPath;
+
+        $revisionFile = fopen('REVISION', 'w');
+        fputs($revisionFile, sha1(time()));
+        fclose($revisionFile);
+
+        $gitProcessor = new GitProcessor($rootPath);
+        $record = $gitProcessor([]);
+
+        $this->assertRegExp("/^[0-9a-f]{40}|[0-9a-f]{6,8}$/", $record['extra']['@git']);
+    }
+}