diff --git a/tests/Message/UriTest.php b/tests/Message/UriTest.php
index 05eec723..1ed6abf2 100644
--- a/tests/Message/UriTest.php
+++ b/tests/Message/UriTest.php
@@ -120,7 +120,10 @@ public static function provideValidUris()
             ),
             array(
                 'http://user%20name:pass%20word@localhost/path%20name?query%20name#frag%20ment'
-            )
+            ),
+            array(
+                'http://docker_container/'
+            ),
         );
     }