Test failure

[vbgl]

Running the tests of version 0.6 produces the following error trace:

--- test/test.ml        2020-12-02 20:26:14.378099919 +0000
+++ test/test.ml.corrected      2020-12-02 20:26:16.712113233 +0000
@@ -49,7 +49,7 @@
     print_endline s'''
   done;
   [%expect {|
-    Wed May 29 21:20:23 +01 2013
-    Fri May 31 21:20:23 +01 2013
-    Sun Jun 30 21:20:23 +01 2013
-    Wed Jul 31 21:20:23 +01 2013 |}]
+    Wed May 29 20:20:23 +00 2013
+    Fri May 31 20:20:23 +00 2013
+    Sun Jun 30 20:20:23 +00 2013
+    Wed Jul 31 20:20:23 +00 2013 |}]

I guess this means that the test is broken (rather than the library).