1 files changed, 6 insertions, 0 deletions
diff --git a/test/ruby/test_time_tz.rb b/test/ruby/test_time_tz.rb
index c3c272dca3..46bbc8433b 100644
--- a/test/ruby/test_time_tz.rb
+++ b/test/ruby/test_time_tz.rb
@@ -536,4 +536,10 @@ class TestTimeTZ::WithTZ < Test::Unit::TestCase
     t = Time.new(2018, 9, 1, 12, 0, 0, tz)
     assert_equal("+0900 #{abbr}", t.strftime("%z %Z"))
   end
+
+  def test_plus_with_timezone
+    t = Time.new(2018, 9, 1, 12, 0, 0, tz) + 4000
+    assert_equal([2018, 9, 1, 13, 6, 40, tz], [t.year, t.mon, t.mday, t.hour, t.min, t.sec, t.zone])
+    assert_equal(Time.utc(2018, 9, 1, 4, 6, 40), t)
+  end
 end