diff --git a/tests/lib/session/cryptosessionhandler.php b/tests/lib/session/cryptosessionhandler.php
index 7c26fd8e7e62..92f0c0929bb9 100644
--- a/tests/lib/session/cryptosessionhandler.php
+++ b/tests/lib/session/cryptosessionhandler.php
@@ -435,7 +435,7 @@ public function testCreate_sid() {
 			->method('generate')
 			->with(
 				64,
-				'abcdefghijklmnopqrstuvwxyz0123456789'
+				'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
 			)
 			->will($this->returnValue('MyRandomSessionId'));
 		$qb = $this->getMockBuilder('\\OCP\\DB\\QueryBuilder\\IQueryBuilder')