diff --git a/core/modules/system/src/Tests/Module/InstallUninstallTest.php b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
index 1fdc2e4..9595c26 100644
--- a/core/modules/system/src/Tests/Module/InstallUninstallTest.php
+++ b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
@@ -75,7 +75,7 @@ public function testInstallUninstall() {
 
       // Install the module.
       $edit = array();
-      $package = ucwords($module->info['package']);
+      $package = strtolower($module->info['package']);
       $edit["modules[$package][$name][enable]"] = TRUE;
       $this->drupalPostForm('admin/modules', $edit, t('Save configuration'));