diff --git a/cloudkittydashboard/overrides.py b/cloudkittydashboard/overrides.py
index 7a9c747..e403663 100644
--- a/cloudkittydashboard/overrides.py
+++ b/cloudkittydashboard/overrides.py
@@ -34,4 +34,5 @@ class InstancePredictivePricing(create_instance.SetInstanceDetailsAction):
                       self).get_help_text(extra_context=extra)
         return extra
 
+
 create_instance.SetInstanceDetails.action_class = InstancePredictivePricing
diff --git a/test-requirements.txt b/test-requirements.txt
index 9cd5b2e..afcc72f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,8 @@
 # The order of packages is significant, because pip processes them in the order
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+
+hacking>=3.0.1,<3.1.0 # Apache-2.0
 coverage>=3.6
 python-subunit>=0.0.18
 oslotest>=1.10.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 6a6bdfd..845c047 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,6 +2,7 @@
 minversion = 2.0
 envlist = py36,py37,pep8
 skipsdist = True
+ignore_basepython_conflict = True
 
 [testenv]
 basepython = python3