diff --git a/lower-constraints.txt b/lower-constraints.txt
index 23452749..8434a0d5 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -10,9 +10,7 @@ eventlet==0.18.2
 extras==1.0.0
 fasteners==0.7.0
 fixtures==3.0.0
-flake8==2.6.0
 greenlet==0.4.10
-hacking==1.1.0
 imagesize==0.7.1
 iso8601==0.1.11
 Jinja2==2.10
@@ -36,8 +34,6 @@ oslo.serialization==2.18.0
 oslo.utils==3.33.0
 oslotest==3.2.0
 pbr==2.0.0
-pep8==1.5.7
-pyflakes==0.8.1
 Pygments==2.2.0
 pyinotify==0.9.6
 PyMI==1.0.0;sys_platform=='win32'
diff --git a/test-requirements.txt b/test-requirements.txt
index 021c258a..d8cbe439 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
 
 coverage!=4.4,>=4.0 # Apache-2.0
 ddt>=1.0.1 # MIT