- Pin pytz to prevent unit test failures from DateTime

zopefoundation · Dec 1, 2017 · f1aa4df · f1aa4df
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diff --git a/doc/CHANGES.rst b/doc/CHANGES.rst
@@ -8,6 +8,8 @@ http://docs.zope.org/zope2/
 2.13.27 (unreleased)
 --------------------
 
+- Pin ``pytz`` to prevent unit test failures from ``DateTime``
+
 - Update virtualenv based installation docs to mention pip<8.0 requirement.
 
 - Explicitly require Manager role for ``AltDatabaseManager``.  [maurits]

diff --git a/version_ranges.cfg b/version_ranges.cfg
@@ -99,3 +99,6 @@ mechanize = < 0.3.dev
 python-gettext = < 1.3.dev
 zope.testbrowser = < 3.12.dev
 
+# pytz 2017.3 provokes a test failure in DateTime:
+# AssertionError: legacy timezone  Canada/East-Saskatchewan cannot be looked up
+pytz = < 2017.3