Issue #3284552: Drupal 10 compatibility

tests/src/Kernel/InactiveSplitTest.php

@@ -21,7 +21,7 @@ class InactiveSplitTest extends KernelTestBase {
    *
    * @var array
    */
-  public static $modules = [
+  protected static $modules = [
     'system',
     'config_split',
   ];