diff --git a/limitador/src/storage/keys.rs b/limitador/src/storage/keys.rs
index 46b8292d..3fe5ded1 100644
--- a/limitador/src/storage/keys.rs
+++ b/limitador/src/storage/keys.rs
@@ -128,6 +128,22 @@ mod tests {
             key_for_counters_of_limit(&limit))
     }
 
+    #[test]
+    fn key_for_limit_with_id_format() {
+        let mut limit = Limit::new(
+            "example.com",
+            10,
+            60,
+            vec!["req.method == 'GET'"],
+            vec!["app_id"],
+        );
+        limit.set_id("test_id".to_string());
+        assert_eq!(
+            "\u{2}\u{7}test_id".as_bytes(),
+            key_for_counters_of_limit(&limit)
+        )
+    }
+
     #[test]
     fn counter_key_and_counter_are_symmetric() {
         let namespace = "ns_counter:";