diff --git a/Test/Export/AbstractAggregatorTest.php b/Test/Export/AbstractAggregatorTest.php
index 0f2e08f39..d7623788b 100644
--- a/Test/Export/AbstractAggregatorTest.php
+++ b/Test/Export/AbstractAggregatorTest.php
@@ -77,7 +77,7 @@ abstract class AbstractAggregatorTest extends KernelTestCase
     {
         foreach ($this->getQueryBuilders() as $qb) {
             foreach ($this->getFormData() as $data) {
-                yield array($qb, $data);
+                yield array(clone $qb, $data);
             }
         }
     }
@@ -89,7 +89,7 @@ abstract class AbstractAggregatorTest extends KernelTestCase
     {
         foreach ($this->getQueryBuilders() as $qb) {
             foreach ($this->getFormData() as $data) {
-                yield array($qb, $data);
+                yield array(clone $qb, $data);
             }
         }
     }