diff --git a/core/tests/Drupal/KernelTests/KernelTestBase.php b/core/tests/Drupal/KernelTests/KernelTestBase.php
index ca1a517..faeb7f9
--- a/core/tests/Drupal/KernelTests/KernelTestBase.php
+++ b/core/tests/Drupal/KernelTests/KernelTestBase.php
@@ -729,13 +729,6 @@ protected function installSchema($module, $tables) {
     foreach ($tables as $table) {
       $schema = drupal_get_module_schema($module, $table);
       if (empty($schema)) {
-        // BC layer to avoid some contrib tests to fail.
-        // @todo Remove the BC layer before 8.1.x release.
-        // @see https://www.drupal.org/node/2670360
-        // @see https://www.drupal.org/node/2670454
-        if ($module == 'system') {
-          continue;
-        }
         throw new \LogicException("$module module does not define a schema for table '$table'.");
       }
       $this->container->get('database')->schema()->createTable($table, $schema);