diff --git a/tests/ui/const-generics/const_patam_ty_impl_bad_field.rs b/tests/ui/const-generics/const_patam_ty_impl_bad_field.rs
index 37cfa1aa7f5..2cfccb68b0e 100644
--- a/tests/ui/const-generics/const_patam_ty_impl_bad_field.rs
+++ b/tests/ui/const-generics/const_patam_ty_impl_bad_field.rs
@@ -1,9 +1,9 @@
 #![feature(const_param_ty_trait)]
 
-#[derive(PartialEq)]
+#[derive(PartialEq, Eq)]
 struct NotParam;
 
-#[derive(PartialEq)]
+#[derive(PartialEq, Eq)]
 struct CantParam(NotParam);
 
 impl std::marker::ConstParamTy for CantParam {}