diff --git a/tests/Grant/AuthCodeGrantTest.php b/tests/Grant/AuthCodeGrantTest.php
index 0e24d120..6b60f2b0 100644
--- a/tests/Grant/AuthCodeGrantTest.php
+++ b/tests/Grant/AuthCodeGrantTest.php
@@ -1707,5 +1707,7 @@ class AuthCodeGrantTest extends TestCase
                 'redirect_uri'  => 'http://foo/bar',
             ]
         );
+
+        $grant->validateAuthorizationRequest($request);
     }
 }
diff --git a/tests/Grant/ImplicitGrantTest.php b/tests/Grant/ImplicitGrantTest.php
index db62d09c..dff2c341 100644
--- a/tests/Grant/ImplicitGrantTest.php
+++ b/tests/Grant/ImplicitGrantTest.php
@@ -447,5 +447,7 @@ class ImplicitGrantTest extends TestCase
                 'redirect_uri'  => 'http://foo/bar',
             ]
         );
+
+        $grant->validateAuthorizationRequest($request);
     }
 }