diff --git a/tests/src/Unit/Plugin/migrate/destination/EntityEventSeriesTest.php b/tests/src/Unit/Plugin/migrate/destination/EntityEventSeriesTest.php
index 98b298723ebd9130ba1e4a958e3f5eeb5589a02f..23e0c0e08b9bdd4c5b29a5011abac707a2da341a 100644
--- a/tests/src/Unit/Plugin/migrate/destination/EntityEventSeriesTest.php
+++ b/tests/src/Unit/Plugin/migrate/destination/EntityEventSeriesTest.php
@@ -53,6 +53,7 @@ class EntityEventSeriesTest extends EntityTestBase {
 
     // Configure the mocked entity storage to create mocked entities.
     $entity = $this->prophesize(ContentEntityInterface::class);
+    $entity->setSyncing(TRUE)->willReturn($entity->reveal());
     $entity->isValidationRequired()->willReturn(FALSE);
     $entity->validate()->willReturn([]);
     $entity->save()->willReturn(self::SAVED_NEW);