diff --git a/tests/lib/Files/Node/FolderTest.php b/tests/lib/Files/Node/FolderTest.php
index c0c14128d6f50..9a3433c020e5e 100644
--- a/tests/lib/Files/Node/FolderTest.php
+++ b/tests/lib/Files/Node/FolderTest.php
@@ -356,6 +356,8 @@ public function testSearchInRoot() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$cache->insert('', ['size' => 0, 'mtime' => 0, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
 		$cache->insert('files', ['size' => 200, 'mtime' => 55, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
@@ -395,6 +397,8 @@ public function testSearchInStorageRoot() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$cache->insert('', ['size' => 0, 'mtime' => 0, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
 		$cache->insert('foo', ['size' => 200, 'mtime' => 55, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
@@ -447,9 +451,13 @@ public function testSearchSubStorages() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$subStorage->method('getCache')
 			->willReturn($subCache);
+		$subStorage->method('getOwner')
+			->willReturn('owner');
 
 		$cache->insert('', ['size' => 0, 'mtime' => 0, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
 		$cache->insert('foo', ['size' => 200, 'mtime' => 55, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);
@@ -503,6 +511,8 @@ public function testGetById() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$this->userMountCache->expects($this->any())
 			->method('getMountsForFileId')
@@ -550,6 +560,8 @@ public function testGetByIdMountRoot() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$this->userMountCache->expects($this->any())
 			->method('getMountsForFileId')
@@ -593,6 +605,8 @@ public function testGetByIdOutsideFolder() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$this->userMountCache->expects($this->any())
 			->method('getMountsForFileId')
@@ -636,6 +650,8 @@ public function testGetByIdMultipleStorages() {
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$this->userMountCache->method('getMountsForFileId')
 			->with(1)
@@ -651,9 +667,6 @@ public function testGetByIdMultipleStorages() {
 				),
 			]);
 
-		$storage->method('getCache')
-			->willReturn($cache);
-
 		$cache->method('get')
 			->with(1)
 			->willReturn($fileInfo);
@@ -965,9 +978,13 @@ public function testSearchSubStoragesLimitOffset(int $offset, int $limit, array
 
 		$storage->method('getCache')
 			->willReturn($cache);
+		$storage->method('getOwner')
+			->willReturn('owner');
 
 		$subStorage1->method('getCache')
 			->willReturn($subCache1);
+		$subStorage1->method('getOwner')
+			->willReturn('owner');
 
 		$subMount2->method('getStorage')
 			->willReturn($subStorage2);
@@ -977,6 +994,8 @@ public function testSearchSubStoragesLimitOffset(int $offset, int $limit, array
 
 		$subStorage2->method('getCache')
 			->willReturn($subCache2);
+		$subStorage2->method('getOwner')
+			->willReturn('owner');
 
 
 		$cache->insert('', ['size' => 0, 'mtime' => 10, 'mimetype' => ICacheEntry::DIRECTORY_MIMETYPE]);