diff --git a/spec/mk_time/consts_spec.rb b/spec/mk_time/consts_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/mk_time/consts_spec.rb
+++ b/spec/mk_time/consts_spec.rb
@@ -71,7 +71,7 @@ describe MkTime::Const do
       ["20120701", -35],
       ["20150701", -36],
       ["20170101", -37],
-      ["20190101",   0]  # (<= Provisional end point)
+      ["20190101",   0]  # (<= Provisional end-point)
     ]) }
   end
 
@@ -208,7 +208,8 @@ describe MkTime::Const do
       ["20160131",  0.0],
       ["20160324", -0.1],
       ["20160519", -0.2],
-      ["20160819",  0.0]  # (<= Provisional end point)
+      ["20160901", -0.3],
+      ["20161201",  0.0]  # (<= Provisional end-point)
     ]) }
   end
 end
UPD: Added a new DUT1 adjustment to constants.