diff --git a/tests/lib/files/cache/updaterlegacy.php b/tests/lib/files/cache/updaterlegacy.php
index deb4cb0b43..c80c3168ad 100644
--- a/tests/lib/files/cache/updaterlegacy.php
+++ b/tests/lib/files/cache/updaterlegacy.php
@@ -137,7 +137,6 @@ class UpdaterLegacy extends \PHPUnit_Framework_TestCase {
 		$this->assertInternalType('string', $folderCachedData['etag']);
 		$this->assertInternalType('string', $cachedData['etag']);
 		$this->assertNotSame($folderCachedData['etag'], $cachedData['etag']);
-		$this->assertEquals($mtime, $cachedData['mtime']);
 	}
 
 	public function testDelete() {