diff --git a/core/modules/rest/tests/src/Unit/CollectRoutesTest.php b/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
index cd388ef..553a994 100644
--- a/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
+++ b/core/modules/rest/tests/src/Unit/CollectRoutesTest.php
@@ -95,6 +95,9 @@ protected function setUp() {
     // Set the style option.
     $this->restExport->setOption('style', array('type' => 'serializer'));
 
+    // Set the auth option.
+    $this->restExport->setOption('auth', ['basic_auth']);
+
     $display_manager->expects($this->once())
       ->method('getDefinition')
       ->will($this->returnValue(array('id' => 'test', 'provider' => 'test')));