diff --git a/core/modules/system/src/Tests/Database/SchemaTest.php b/core/modules/system/src/Tests/Database/SchemaTest.php
index 5c67faf..f5c0c02 100644
--- a/core/modules/system/src/Tests/Database/SchemaTest.php
+++ b/core/modules/system/src/Tests/Database/SchemaTest.php
@@ -476,7 +476,5 @@ protected function assertFieldCharacteristics($table_name, $field_name, $field_s
         ->fetchField();
       $this->assertEqual($field_value, $field_spec['default'], 'Default value registered.');
     }
-
-    db_drop_field($table_name, $field_name);
   }
 }