diff --git a/sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamTest.scala b/sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamTest.scala
index d7401897ff6a4..7439c7ab6d6e1 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamTest.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamTest.scala
@@ -346,7 +346,8 @@ trait StreamTest extends QueryTest with SharedSparkSession with TimeLimits with
   def testStream(
       _stream: Dataset[_],
       outputMode: OutputMode = OutputMode.Append,
-      extraOptions: Map[String, String] = Map.empty)(actions: StreamAction*): Unit = synchronized {
+      extraOptions: Map[String, String] = Map.empty,
+      sink: MemorySink = new MemorySink())(actions: StreamAction*): Unit = synchronized {
     import org.apache.spark.sql.streaming.util.StreamManualClock
 
     // `synchronized` is added to prevent the user from calling multiple `testStream`s concurrently
@@ -359,7 +360,6 @@ trait StreamTest extends QueryTest with SharedSparkSession with TimeLimits with
     var currentStream: StreamExecution = null
     var lastStream: StreamExecution = null
     val awaiting = new mutable.HashMap[Int, OffsetV2]() // source index -> offset to wait for
-    val sink = new MemorySink
     val resetConfValues = mutable.Map[String, Option[String]]()
     val defaultCheckpointLocation =
       Utils.createTempDir(namePrefix = "streaming.metadata").getCanonicalPath