diff --git a/rust-runtime/aws-smithy-client/src/test_connection.rs b/rust-runtime/aws-smithy-client/src/test_connection.rs
index e2976b98239..e9e6e582f2f 100644
--- a/rust-runtime/aws-smithy-client/src/test_connection.rs
+++ b/rust-runtime/aws-smithy-client/src/test_connection.rs
@@ -292,6 +292,7 @@ where
 
 #[derive(Clone)]
 struct ConnectionFn {
+    #[allow(clippy::type-complexity)]
     response: Arc<
         dyn Fn(http::Request<SdkBody>) -> Result<http::Response<SdkBody>, ConnectorError>
             + Send