diff -r b9bf26ea0118 -r b2731af0357d vmtest/src/test/java/org/apidesign/bck2brwsr/tck/IntegerArithmeticTest.java
--- a/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/IntegerArithmeticTest.java	Thu Feb 07 17:41:41 2013 +0100
+++ b/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/IntegerArithmeticTest.java	Fri Feb 15 16:06:12 2013 +0100
@@ -94,7 +94,33 @@
     @Compare public int divisionReminder() {
         return mod(1, 2);
     }
-    
+
+    @Compare public int negativeDivision() {
+        return div(-7, 3);
+    }
+
+    @Compare public int negativeDivisionReminder() {
+        return mod(-7, 3);
+    }
+
+    @Compare public boolean divByZeroThrowsArithmeticException() {
+        try {
+            div(1, 0);
+            return false;
+        } catch (final ArithmeticException e) {
+            return true;
+        }
+    }
+
+    @Compare public boolean modByZeroThrowsArithmeticException() {
+        try {
+            mod(1, 0);
+            return false;
+        } catch (final ArithmeticException e) {
+            return true;
+        }
+    }
+
     @Compare public int negate() {
         return neg(123456);
     }