diff --git a/flink-runtime/src/test/java/org/apache/flink/runtime/util/ClassLoaderUtilsTest.java b/flink-runtime/src/test/java/org/apache/flink/runtime/util/ClassLoaderUtilsTest.java
index d5f3c9ebded76..654001df254c4 100644
--- a/flink-runtime/src/test/java/org/apache/flink/runtime/util/ClassLoaderUtilsTest.java
+++ b/flink-runtime/src/test/java/org/apache/flink/runtime/util/ClassLoaderUtilsTest.java
@@ -85,8 +85,6 @@ public void testWithURLClassLoader() {
 			assertTrue(info.indexOf(validJar.getAbsolutePath() + "' (valid") > 0);
 			assertTrue(info.indexOf(invalidJar.getAbsolutePath() + "' (invalid JAR") > 0);
 			assertTrue(info.indexOf(nonExisting.getAbsolutePath() + "' (missing") > 0);
-
-			System.out.println(info);
 		}
 		catch (Exception e) {
 			e.printStackTrace();
@@ -107,7 +105,6 @@ public void testWithURLClassLoader() {
 	@Test
 	public void testWithAppClassLoader() {
 		try {
-			// must return something when invoked with 'null'
 			String result = ClassLoaderUtil.getUserCodeClassLoaderInfo(ClassLoader.getSystemClassLoader());
 			assertTrue(result.toLowerCase().contains("system classloader"));
 		}
diff --git a/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/graph/StreamConfig.java b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/graph/StreamConfig.java
index a8486d3cf1a58..4f19db6febcf7 100644
--- a/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/graph/StreamConfig.java
+++ b/flink-staging/flink-streaming/flink-streaming-core/src/main/java/org/apache/flink/streaming/api/graph/StreamConfig.java
@@ -213,8 +213,8 @@ public <T> T getStreamOperator(ClassLoader cl) {
 			String exceptionMessage = "Cannot load user class: " + e.getMessage()
 					+ "\nClassLoader info: " + classLoaderInfo + 
 					(loadableDoubleCheck ? 
-							"Class was actually found in classloader - deserialization issue." :
-							"Class not resolveable through given classloader.");
+							"\nClass was actually found in classloader - deserialization issue." :
+							"\nClass not resolvable through given classloader.");
 			
 			throw new StreamTaskException(exceptionMessage);
 		}