diff --git a/shared/time/yday.rb b/shared/time/yday.rb
index 99156c2e8..f81c45261 100644
--- a/shared/time/yday.rb
+++ b/shared/time/yday.rb
@@ -10,4 +10,9 @@
       end
     end
   end
+
+  it 'supports leap years' do
+    @method.call(2016, 2, 29).should == 31 + 29
+    @method.call(2016, 3, 1).should == 31 + 29 + 1
+  end
 end