diff --git a/spec/ruby/core/time/new_spec.rb b/spec/ruby/core/time/new_spec.rb
index 3cafd46db7..f7049a5459 100644
--- a/spec/ruby/core/time/new_spec.rb
+++ b/spec/ruby/core/time/new_spec.rb
@@ -129,6 +129,8 @@
 
       time.zone.should == zone
       time.utc_offset.should == 5*3600+30*60
+      time.wday.should == 6
+      time.yday.should == 1
     end
 
     it "accepts timezone argument that must have #local_to_utc and #utc_to_local methods" do
diff --git a/test/ruby/test_time_tz.rb b/test/ruby/test_time_tz.rb
index a95f9e74b4..1d86d0c9f7 100644
--- a/test/ruby/test_time_tz.rb
+++ b/test/ruby/test_time_tz.rb
@@ -604,6 +604,8 @@ def subtest_new(time_class, tz, tzarg, tzname, abbr, utc_offset)
     assert_equal([2018, 9, 1, 12, 0, 0, tz], [t.year, t.mon, t.mday, t.hour, t.min, t.sec, t.zone])
     h, m = (-utc_offset / 60).divmod(60)
     assert_equal(time_class.utc(2018, 9, 1, 12+h, m, 0).to_i, t.to_i)
+    assert_equal(6, t.wday)
+    assert_equal(244, t.yday)
   end
 
   def subtest_now(time_class, tz, tzarg, tzname, abbr, utc_offset)