diff --git a/LernProgramm/testProgramm.java b/LernProgramm/testProgramm.java
index d453362..8631d37 100644
--- a/LernProgramm/testProgramm.java
+++ b/LernProgramm/testProgramm.java
@@ -46,4 +46,17 @@ class testProgramm {
 	    	 assertTrue(true);
 	    }
 	  }
+	  
+	  @Test
+	    public void testDivision() {
+	      int result = ProgrammMain.calculate("1010", "1011", '/');
+	      assertEquals(0, result);
+	    }
+	    
+	    @Test
+	    public void testInvalidOperation() {
+	      int result = ProgrammMain.calculate("1010", "1011", '%');
+	      assertEquals(0, result);
+	    }
+	  
 }
diff --git a/bin/LernProgramm/testProgramm.class b/bin/LernProgramm/testProgramm.class
index 1197d7b..2f70569 100644
Binary files a/bin/LernProgramm/testProgramm.class and b/bin/LernProgramm/testProgramm.class differ