diff --git a/tests/Composer/Test/Mock/FactoryMock.php b/tests/Composer/Test/Mock/FactoryMock.php
index 8d23f4d43..11b266590 100644
--- a/tests/Composer/Test/Mock/FactoryMock.php
+++ b/tests/Composer/Test/Mock/FactoryMock.php
@@ -37,7 +37,7 @@ class FactoryMock extends Factory
     {
     }
 
-    protected function createInstallationManager(Config $config)
+    protected function createInstallationManager()
     {
         return new InstallationManagerMock;
     }