diff --git a/test-requirements.txt b/test-requirements.txt
index 1fd68fb..218c718 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 bashate>=0.2 # Apache-2.0
-hacking>=0.12.0,!=0.13.0,<0.14  # Apache-2.0
+hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
 sphinx>=1.5.1 # BSD