2 files changed, 3 insertions, 3 deletions
diff --git a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUTextRendererListenerBase01.java b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUTextRendererListenerBase01.java
index 97c9d905c..551ab558f 100644
--- a/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUTextRendererListenerBase01.java
+++ b/src/test/com/jogamp/opengl/test/junit/graph/demos/GPUTextRendererListenerBase01.java
@@ -97,7 +97,7 @@ public abstract class GPUTextRendererListenerBase01 extends GPURendererListenerB
         "in lorem. Maecenas in ipsum ac justo scelerisque sollicitudin. Quisque sit amet neque lorem,\n" +
         "-------Press H to change text---------\n"; 
     
-    StringBuffer userString = new StringBuffer();
+    StringBuilder userString = new StringBuilder();
     boolean userInput = false;
     
     public GPUTextRendererListenerBase01(RenderState rs, int modes, boolean debug, boolean trace) {
diff --git a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestInitConcurrentNEWT.java b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestInitConcurrentNEWT.java
index f8cbb0a29..8c0213e8e 100644
--- a/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestInitConcurrentNEWT.java
+++ b/src/test/com/jogamp/opengl/test/junit/jogl/acore/TestInitConcurrentNEWT.java
@@ -136,7 +136,7 @@ public class TestInitConcurrentNEWT extends UITestCase {
         return true;
     }
     protected static String doneDump(JOGLTask[] tasks) {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         sb.append("[");
         for(int i=0; i<tasks.length; i++) {
             if(i>0) {
@@ -157,7 +157,7 @@ public class TestInitConcurrentNEWT extends UITestCase {
         return true;
     }
     protected static String isAliveDump(Thread[] threads) {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
         sb.append("[");
         for(int i=0; i<threads.length; i++) {
             if(i>0) {