diff --git a/tests/php/Authenticators/LDAPAuthenticatorTest.php b/tests/php/Authenticators/LDAPAuthenticatorTest.php
index 9fcadd2..d24bb90 100644
--- a/tests/php/Authenticators/LDAPAuthenticatorTest.php
+++ b/tests/php/Authenticators/LDAPAuthenticatorTest.php
@@ -26,6 +26,11 @@ class LDAPAuthenticatorTest extends SapphireTest
      */
     private $request;
 
+    /**
+     * @var LDAPService
+     */
+    private $service;
+
     /**
      * @var ValidationResult
      */