diff --git a/src/TestHelper/EntityCreator.php b/src/TestHelper/EntityCreator.php
index 414814669..e2d4580ad 100644
--- a/src/TestHelper/EntityCreator.php
+++ b/src/TestHelper/EntityCreator.php
@@ -55,7 +55,13 @@ protected function fill(IEntity $entity, array $params): void
 				$value = $this->random($property);
 			}
 
-			if ($property->wrapper !== null) {
+			if (
+				$property->relationship !== null
+				&& in_array($property->relationship->type, [
+					PropertyRelationshipMetadata::ONE_HAS_MANY,
+					PropertyRelationshipMetadata::MANY_HAS_MANY,
+				], true)
+			) {
 				$realProperty = $entity->getProperty($key);
 				if ($realProperty instanceof IRelationshipCollection) {
 					$realProperty->set($value);