Issue #3119262 by Berdir: Fix non-static access to $this->modules

tests/src/Kernel/Plugin/Derivative/EntityReferenceRevisionsDeriverTest.php

@@ -24,7 +24,7 @@ class EntityReferenceRevisionsDeriverTest extends KernelTestBase {
    */
   protected function setUp() {
     parent::setUp();
-    $this->installConfig($this->modules);
+    $this->installConfig(static::$modules);
   }
 
   /**

tests/src/Kernel/Plugin/migrate/destination/EntityReferenceRevisionsDestinationTest.php

@@ -44,7 +44,7 @@ class EntityReferenceRevisionsDestinationTest extends KernelTestBase implements
     parent::setUp();
     $this->installEntitySchema('entity_test_composite');
     $this->installSchema('system', ['sequences']);
-    $this->installConfig($this->modules);
+    $this->installConfig(static::$modules);
 
     $this->migrationPluginManager = \Drupal::service('plugin.manager.migration');
   }