diff --git a/core/org.eclipse.cdt.core.tests/misc/org/eclipse/cdt/core/internal/tests/StringBuilderTest.java b/core/org.eclipse.cdt.core.tests/misc/org/eclipse/cdt/core/internal/tests/StringBuilderTest.java
index 6abf500dbcf..513becdf63c 100644
--- a/core/org.eclipse.cdt.core.tests/misc/org/eclipse/cdt/core/internal/tests/StringBuilderTest.java
+++ b/core/org.eclipse.cdt.core.tests/misc/org/eclipse/cdt/core/internal/tests/StringBuilderTest.java
@@ -11,6 +11,8 @@
 
 package org.eclipse.cdt.core.internal.tests;
 
+import java.lang.reflect.Method;
+
 import junit.framework.Test;
 import junit.framework.TestCase;
 import junit.framework.TestSuite;
@@ -38,4 +40,17 @@ public class StringBuilderTest extends TestCase {
     	b1.append(b2);
     	assertEquals("ab", b1.toString());
     }
+    
+    public void testStringBuilderMethods() throws Exception {
+    	Class clazz= StringBuilder.class;
+		Method method= clazz.getMethod("append", CharSequence.class);  
+		assertNotNull(method);
+    	try {
+    		method= clazz.getMethod("append", StringBuilder.class);
+    		fail();
+    	}
+    	catch (NoSuchMethodException m) {
+    		// ok
+    	}
+    }
 }