diff --git a/lower-constraints.txt b/lower-constraints.txt
index b17d28c..3e3e0a0 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -10,9 +10,6 @@ doc8==0.6.0
 dogpile.cache==0.6.2
 extras==1.0.0
 fixtures==3.0.0
-flake8==2.5.5
-flake8-import-order==0.12
-hacking==1.1.0
 idna==2.6
 jmespath==0.9.0
 jsonpatch==1.16
@@ -32,10 +29,8 @@ oslo.serialization==2.18.0
 oslo.utils==3.33.0
 oslotest==3.2.0
 pbr==2.0.0
-pep8==1.5.7
 positional==1.2.1
 pycparser==2.18
-pyflakes==0.8.1
 Pygments==2.2.0
 pylint==1.9.2
 pyOpenSSL==17.1.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 2b52050..a28ea62 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=3.0,<3.1.0 # Apache-2.0
+hacking>=3.0.1,<3.1.0 # Apache-2.0
 requests-mock>=1.2.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 doc8>=0.6.0 # Apache-2.0