diff --git a/library/Icinga/Test/BaseTestCase.php b/library/Icinga/Test/BaseTestCase.php
index 9fdc72a57..43f2e6224 100644
--- a/library/Icinga/Test/BaseTestCase.php
+++ b/library/Icinga/Test/BaseTestCase.php
@@ -32,7 +32,7 @@ namespace Icinga\Test {
     /**
      * Class BaseTestCase
      */
-    class BaseTestCase extends PHPUnit_Framework_TestCase implements DbTest
+    abstract class BaseTestCase extends PHPUnit_Framework_TestCase implements DbTest
     {
         /**
          * Path to application/