diff --git a/test/ServiceManagerTest.php b/test/ServiceManagerTest.php
index b61c8c9a..140ff3a4 100644
--- a/test/ServiceManagerTest.php
+++ b/test/ServiceManagerTest.php
@@ -58,7 +58,7 @@ public function testConfigurationCanBeMerged()
     public function testConfigurationTakesPrecedenceWhenMerged()
     {
         $factory = $this->getMockBuilder(FactoryInterface::class)
-            ->getMock();
+            ->get();
 
         $factory->expects($this->once())->method('__invoke');