diff --git a/redis/src/streams.rs b/redis/src/streams.rs
index 2b3e815a9..762480ee9 100644
--- a/redis/src/streams.rs
+++ b/redis/src/streams.rs
@@ -453,8 +453,8 @@ impl StreamId {
     }
 
     /// Does the message contain a particular field?
-    pub fn contains_key(&self, key: &&str) -> bool {
-        self.map.get(*key).is_some()
+    pub fn contains_key(&self, key: &str) -> bool {
+        self.map.get(key).is_some()
     }
 
     /// Returns how many field/value pairs exist in this message.
diff --git a/redis/tests/test_streams.rs b/redis/tests/test_streams.rs
index 3f297324a..4ee33d38f 100644
--- a/redis/tests/test_streams.rs
+++ b/redis/tests/test_streams.rs
@@ -146,9 +146,9 @@ fn test_assorted_1() {
     let _: RedisResult<String> = con.xadd_map("k3", "3000-0", map);
 
     let reply: StreamRangeReply = con.xrange_all("k3").unwrap();
-    assert!(reply.ids[0].contains_key(&"ab"));
-    assert!(reply.ids[0].contains_key(&"ef"));
-    assert!(reply.ids[0].contains_key(&"ij"));
+    assert!(reply.ids[0].contains_key("ab"));
+    assert!(reply.ids[0].contains_key("ef"));
+    assert!(reply.ids[0].contains_key("ij"));
 
     // test xadd w/ maxlength below...