diff --git a/tests/lib/Command/Integrity/SignAppTest.php b/tests/lib/Command/Integrity/SignAppTest.php
index b30d465fca..689b046e24 100644
--- a/tests/lib/Command/Integrity/SignAppTest.php
+++ b/tests/lib/Command/Integrity/SignAppTest.php
@@ -232,12 +232,12 @@ class SignAppTest extends TestCase {
 			->expects($this->at(0))
 			->method('file_get_contents')
 			->with('privateKey')
-			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+			->willReturn(file_get_contents(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
 		$this->fileAccessHelper
 			->expects($this->at(1))
 			->method('file_get_contents')
 			->with('certificate')
-			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
+			->willReturn(file_get_contents(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
 
 		$this->checker
 			->expects($this->once())
@@ -276,12 +276,12 @@ class SignAppTest extends TestCase {
 			->expects($this->at(0))
 			->method('file_get_contents')
 			->with('privateKey')
-			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+			->willReturn(file_get_contents(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
 		$this->fileAccessHelper
 			->expects($this->at(1))
 			->method('file_get_contents')
 			->with('certificate')
-			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
+			->willReturn(file_get_contents(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
 
 		$this->checker
 			->expects($this->once())