1 files changed, 2 insertions, 1 deletions
diff --git a/tox.ini b/tox.ini
index 925ea7f..b46fed7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,9 +6,10 @@ deps =
     pytest==3.3.2
     pytest-cov==2.5.1
     cdecimal: m3-cdecimal
-    freezegun
+    freezegun==0.3.9
 whitelist_externals = make
 commands = make clean-cldr test
+passenv = PYTHON_TEST_FLAGS
 
 [pep8]
 ignore = E501,E731,W503