diff --git a/requirements.txt b/requirements.txt
index 3a245eb..6d6b186 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Babel!=2.4.0,>=2.3.4 # BSD
 cliff>=2.6.0 # Apache-2.0
 keystoneauth1>=2.20.0 # Apache-2.0
 os-client-config>=1.27.0 # Apache-2.0
-oslo.i18n>=2.1.0 # Apache-2.0
+oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
 oslo.utils>=3.20.0 # Apache-2.0
 simplejson>=2.2.0 # MIT
 stevedore>=1.20.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index b0f04ea..71f70be 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,12 +3,12 @@
 # process, which may cause wedges in the gate later.
 hacking<0.11,>=0.10.0
 
-coverage>=4.0 # Apache-2.0
+coverage!=4.4,>=4.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 mock>=2.0 # BSD
 oslotest>=1.10.0 # Apache-2.0
 requests-mock>=1.1 # Apache-2.0
-sphinx>=1.5.1 # BSD
+sphinx!=1.6.1,>=1.5.1 # BSD
 os-testr>=0.8.0 # Apache-2.0
 testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=1.4.0 # MIT