diff --git a/flinkspector-core/src/main/java/org/flinkspector/core/runtime/Runner.java b/flinkspector-core/src/main/java/org/flinkspector/core/runtime/Runner.java
index 4fbb7c4..1b183b6 100644
--- a/flinkspector-core/src/main/java/org/flinkspector/core/runtime/Runner.java
+++ b/flinkspector-core/src/main/java/org/flinkspector/core/runtime/Runner.java
@@ -268,10 +268,8 @@ public <OUT> int registerListener(OutputVerifier<OUT> verifier,
 
 			@Override
 			public void onSuccess(ResultState state) {
-				System.out.println("Success");
 				if(state != ResultState.SUCCESS) {
 					if (runningListeners.decrementAndGet() == 0) {
-						System.out.println("kill-s");
 						stopExecution();
 					}
 				}
@@ -280,9 +278,7 @@ public void onSuccess(ResultState state) {
 			@Override
 			public void onFailure(Throwable throwable) {
 				//check if other sockets are still running
-				System.out.println("Failure");
 				if (runningListeners.decrementAndGet() == 0) {
-					System.out.println("kill-f");
 					stopExecution();
 				}
 			}
diff --git a/flinkspector-dataset/src/test/scala/org/flinkspector/dataset/DataSetEnvironmentSpec.scala b/flinkspector-dataset/src/test/scala/org/flinkspector/dataset/DataSetEnvironmentSpec.scala
index bacf452..4e3543e 100644
--- a/flinkspector-dataset/src/test/scala/org/flinkspector/dataset/DataSetEnvironmentSpec.scala
+++ b/flinkspector-dataset/src/test/scala/org/flinkspector/dataset/DataSetEnvironmentSpec.scala
@@ -26,6 +26,7 @@ import org.flinkspector.core.trigger.VerifyFinishedTrigger
 import org.scalatest.exceptions.TestFailedException
 
 import scala.collection.JavaConversions._
+import org.scalatest.time.SpanSugar._
 
 class DataSetEnvironmentSpec extends CoreSpec {
 
@@ -107,7 +108,8 @@ class DataSetEnvironmentSpec extends CoreSpec {
       })
     val outputFormat = env.createTestOutputFormat(happyVerifier)
     dataSet.output(outputFormat)
-    env.executeTest()
+
+      env.executeTest()
 
     //check if a forceful stop was invoked
     env.hasBeenStopped shouldBe true
@@ -135,7 +137,10 @@ class DataSetEnvironmentSpec extends CoreSpec {
     val outputFormat = env.createTestOutputFormat(sadVerifier)
     dataSet.output(outputFormat)
 //    failAfter(Span(10,Seconds)) {
+
       an [FlinkTestFailedException] shouldBe thrownBy (env.executeTest())
+
+
 //    }
     //check if a forceful stop was invoked
     env.hasBeenStopped shouldBe true
diff --git a/flinkspector-datastream/src/test/scala/org/flinkspector/datastream/StreamTestEnvironmentSpec.scala b/flinkspector-datastream/src/test/scala/org/flinkspector/datastream/StreamTestEnvironmentSpec.scala
index bec099c..ea8cb43 100644
--- a/flinkspector-datastream/src/test/scala/org/flinkspector/datastream/StreamTestEnvironmentSpec.scala
+++ b/flinkspector-datastream/src/test/scala/org/flinkspector/datastream/StreamTestEnvironmentSpec.scala
@@ -113,7 +113,7 @@ class StreamTestEnvironmentSpec extends CoreSpec {
     val sink = env.createTestSink(happyVerifier)
     source.addSink(sink)
 
-    env.executeTest()
+      env.executeTest()
 
     //check if a forceful stop was invoked
     env.hasBeenStopped shouldBe true
@@ -139,9 +139,9 @@ class StreamTestEnvironmentSpec extends CoreSpec {
       })
     val sink = env.createTestSink(sadVerifier)
     source.addSink(sink)
-    failAfter(Span(3,Seconds)) {
+
       an [FlinkTestFailedException] shouldBe thrownBy (env.executeTest())
-    }
+
     //check if a forceful stop was invoked
     env.hasBeenStopped shouldBe true