diff --git a/test-requirements.txt b/test-requirements.txt
index afe596184eb..bfea5d2cb87 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,6 @@
 # process, which may cause wedges in the gate later.
 hacking<0.11,>=0.10.0
 
-cliff!=1.16.0,!=1.17.0,>=1.15.0 # Apache-2.0
 coverage>=3.6 # Apache-2.0
 fixtures<2.0,>=1.3.1 # Apache-2.0/BSD
 mock>=1.2 # BSD