diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala
index 7093dbfe8ef..6527243921f 100644
--- a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala
+++ b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala
@@ -173,7 +173,7 @@ class WorkerSpec
     )
     val addPort1 = AsyncRPCClient.ControlInvocation(
       METHOD_ASSIGN_PORT,
-      AssignPortRequest(mockPortId, input = true, mkSchema(1).toRawSchema, List(""), List()),
+      AssignPortRequest(mockPortId, input = true, mkSchema(1).toRawSchema, List(), List()),
       AsyncRPCContext(COORDINATOR, identifier1),
       1
     )