diff --git a/src/robot.rs b/src/robot.rs
index aef374c..4db9b8e 100644
--- a/src/robot.rs
+++ b/src/robot.rs
@@ -247,5 +247,6 @@ mod test {
         assert_eq!(true, allow_access("User-agent: Xbot\nDisallow: /z", "XBot/3.2.1", "/"));
         assert_eq!(true, allow_access("User-agent: Xbot\nDisallow: /z", "XBot/3.2.1", "/w"));
         assert_eq!(false, allow_access("User-agent: Xbot\nDisallow: /", "XBot", "/"));
+        assert_eq!(false, allow_access("User-agent: Xbot\nDisallow: /", "xbot", "/"));
     }
 }
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