diff --git a/crates/ink/tests/ui/event/fail/generics.rs b/crates/ink/tests/ui/event/fail/generics.rs
index 72487d3eeba..2d54a7003d7 100644
--- a/crates/ink/tests/ui/event/fail/generics.rs
+++ b/crates/ink/tests/ui/event/fail/generics.rs
@@ -1,4 +1,4 @@
-#[derive(ink::Event, scale::Encode)]
+#[derive(ink::Event)]
 pub struct Event<T> {
     #[ink(topic)]
     pub topic: T,