diff --git a/test_suite/tests/test_gen.rs b/test_suite/tests/test_gen.rs
index 28b7d0be..d8def742 100644
--- a/test_suite/tests/test_gen.rs
+++ b/test_suite/tests/test_gen.rs
@@ -4,7 +4,11 @@
 
 #![deny(warnings)]
 #![cfg_attr(feature = "unstable", feature(non_ascii_idents))]
-#![allow(mixed_script_confusables, clippy::trivially_copy_pass_by_ref)]
+#![allow(
+    unknown_lints,
+    mixed_script_confusables,
+    clippy::trivially_copy_pass_by_ref
+)]
 
 use serde::de::DeserializeOwned;
 use serde::{Deserialize, Deserializer, Serialize, Serializer};