diff --git a/test_suite/tests/test_gen.rs b/test_suite/tests/test_gen.rs
index 368403e7..a524c772 100644
--- a/test_suite/tests/test_gen.rs
+++ b/test_suite/tests/test_gen.rs
@@ -539,6 +539,22 @@ fn test_gen() {
         array: [u8; 256],
     }
     assert_ser::<BigArray>();
+
+    trait AssocSerde {
+        type Assoc;
+    }
+
+    struct NoSerdeImpl;
+    impl AssocSerde for NoSerdeImpl {
+        type Assoc = u32;
+    }
+
+    #[derive(Serialize, Deserialize)]
+    struct AssocDerive<T: AssocSerde> {
+        assoc: T::Assoc
+    }
+
+    assert::<AssocDerive<NoSerdeImpl>>();
 }
 
 //////////////////////////////////////////////////////////////////////////