diff --git a/core/modules/forum/src/Tests/ForumUninstallTest.php b/core/modules/forum/src/Tests/ForumUninstallTest.php
index 5834a9d..59c1473 100644
--- a/core/modules/forum/src/Tests/ForumUninstallTest.php
+++ b/core/modules/forum/src/Tests/ForumUninstallTest.php
@@ -94,9 +94,6 @@ public function testForumUninstallWithField() {
       $term->delete();
     }
 
-    // Force a module rebuild.
-    //system_rebuild_module_data();
-
     // Now attempt to uninstall forum.
     $this->drupalGet('admin/modules/uninstall');
     // Assert forum is no longer required.