diff --git a/tests/lib/Cache/FileCacheTest.php b/tests/lib/Cache/FileCacheTest.php
index be27ff04f09..9ba19553cf1 100644
--- a/tests/lib/Cache/FileCacheTest.php
+++ b/tests/lib/Cache/FileCacheTest.php
@@ -150,7 +150,8 @@ class FileCacheTest extends TestCache {
 			->method('filemtime')
 			->willReturn(100);
 		$mockStorage->expects($this->atLeastOnce())
-			->method('unlink')->willReturnOnConsecutiveCalls($this->throwException($testException), $this->returnValue(true));
+			->method('unlink')
+			->willReturnOnConsecutiveCalls($this->throwException($testException), true);
 
 		$this->instance->set('key1', 'value1');
 		$this->instance->set('key2', 'value2');