diff --git a/modules/dynamic/test/src-jvm/smithy4s/dynamic/CollectionSpec.scala b/modules/dynamic/test/src-jvm/smithy4s/dynamic/CollectionSpec.scala
index 811e591b7..0a6fa9506 100644
--- a/modules/dynamic/test/src-jvm/smithy4s/dynamic/CollectionSpec.scala
+++ b/modules/dynamic/test/src-jvm/smithy4s/dynamic/CollectionSpec.scala
@@ -21,6 +21,10 @@ import model._
 
 class CollectionSpec() extends DummyIO.Suite {
 
+  trait Wat {
+    def demo(s: java.util.stream.Stream[String]) = s.toList
+  }
+
   test("Decode collections with member hints") {
     loadDynamicModel("collections.smithy")
       .map { model =>