diff --git a/zio-kafka-test/src/test/scala/zio/kafka/producer/AsyncProducerTestSupport.scala b/zio-kafka-test/src/test/scala/zio/kafka/producer/AsyncProducerTestSupport.scala
index f0b46719d..94599c323 100644
--- a/zio-kafka-test/src/test/scala/zio/kafka/producer/AsyncProducerTestSupport.scala
+++ b/zio-kafka-test/src/test/scala/zio/kafka/producer/AsyncProducerTestSupport.scala
@@ -211,7 +211,7 @@ object AsyncProducerTestSupport {
                          sendOperation.callbackPromise.await,
                          Seq(ZIO.logInfo(s"Still expecting mock behavior $mb").delay(3.seconds).forever)
                        )
-                       .timeoutFail(new AssertionError("Timed out waiting for mock behavior $mb"))(1.minute)
+                       .timeoutFail(new AssertionError(s"Timed out waiting for mock behavior $mb"))(1.minute)
               } yield ()
             case CallbackSucceed(n) =>
               for {