Fix kernel booting problem on Aggregator and Filter tests

src/Bundle/ChillMainBundle/Test/Export/AbstractFilterTest.php

@@ -40,6 +40,11 @@ abstract class AbstractFilterTest extends KernelTestCase
         $this->prophet = $this->getProphet();
     }
 
+    protected function tearDown(): void
+    {
+        self::ensureKernelShutdown();
+    }
+
     /**
      * provide data for `testAliasDidNotDisappears`.
      */