diff --git a/querydsl-core/src/test/java/com/querydsl/core/util/MathUtilsTest.java b/querydsl-core/src/test/java/com/querydsl/core/util/MathUtilsTest.java
index 932ab5561..f5dd432a8 100644
--- a/querydsl-core/src/test/java/com/querydsl/core/util/MathUtilsTest.java
+++ b/querydsl-core/src/test/java/com/querydsl/core/util/MathUtilsTest.java
@@ -18,11 +18,17 @@ import static org.junit.Assert.assertSame;
 
 import java.math.BigDecimal;
 import java.math.BigInteger;
+import java.util.concurrent.atomic.AtomicInteger;
 
+import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.ExpectedException;
 
 public class MathUtilsTest {
 
+    @Rule
+    public final ExpectedException expectedException = ExpectedException.none();
+
     @Test
     public void sum() {
         assertEquals(Integer.valueOf(5), MathUtils.sum(2, 3.0));
@@ -57,6 +63,14 @@ public class MathUtilsTest {
         checkSame((byte) 1, Byte.class);
     }
 
+    @Test
+    public void cast_throws_on_unsupported_numbers() {
+        expectedException.expect(IllegalArgumentException.class);
+        expectedException.expectMessage("Unsupported target type");
+
+        checkCast(1, AtomicInteger.class);
+    }
+
     private static void checkCast(Number value, Class<? extends Number> targetClass) {
         Number target = MathUtils.cast(value, targetClass);
         assertSame(targetClass, target.getClass());