diff --git a/test/plugindevelopment/MartinTestCases/MatrixWhile.jav b/test/plugindevelopment/MartinTestCases/MatrixWhile.jav
new file mode 100644
index 00000000..e696ea61
--- /dev/null
+++ b/test/plugindevelopment/MartinTestCases/MatrixWhile.jav
@@ -0,0 +1,43 @@
+class Matrix extends Vector<Vector<Integer>> {
+
+	Matrix mul_rec(Matrix m) {
+		 v1;
+		 v1 = new Vector<Integer>();
+         v2;
+         v2 = new Vector<Integer>();
+         i;
+         i = 0;
+         while(i < m.size()) {
+             v;
+             v = m.elementAt(i);
+             v2.addElement(v.remove(v.size()-1));
+             i++;
+         }
+         Matrix ret;
+         if (m.elementAt(0).size() > 0) {
+             ret = this.mul_rec(m);
+         }
+         else {
+             ret = new Matrix();
+             i = 0;
+             while (i < this.size()) {
+                 ret.addElement(new Vector<Integer>());
+             i++;
+             }
+         }
+         i = 0;
+         while (i < this.size()) {
+             int erg = 0;
+             j;
+             j = 0;
+             while (j < v2.size()) {
+                 erg = erg + this.elementAt(i).elementAt(j).intValue()
+                     * v2.elementAt(j).intValue();
+             	 j++;
+             }
+             ret.elementAt(i).addElement(erg);
+             i++;
+         }
+         return ret;
+     }
+}
\ No newline at end of file
diff --git a/test/plugindevelopment/MartinTestCases/Tester.java b/test/plugindevelopment/MartinTestCases/Tester.java
index d056fc59..923c65e6 100644
--- a/test/plugindevelopment/MartinTestCases/Tester.java
+++ b/test/plugindevelopment/MartinTestCases/Tester.java
@@ -53,7 +53,7 @@ public class Tester extends TypeInsertTester{
 	public void runTests(){
 		Vector<String> testFiles = new Vector<String>();
 		testFiles.add("AchimTest1.jav");
-		
+		testFiles.add("MatrixWhile.jav");
 		//testFiles.add("BoundedType1.jav");
 		testFiles.add("BoundedType2.jav");
 		testFiles.add("BoundedType.jav");