diff --git a/test/spec/nsnumber_spec.rb b/test/spec/nsnumber_spec.rb
new file mode 100644
index 00000000..46023fe4
--- /dev/null
+++ b/test/spec/nsnumber_spec.rb
@@ -0,0 +1,6 @@
+describe "Bignums" do
+  it "can be converted into NSNumber with 'long long' type" do
+    num = 1346543403000
+    NSNumber.numberWithLongLong(num).longLongValue.should == num
+  end
+end