diff --git a/test-requirements.txt b/test-requirements.txt
index 17fa9f1..bd4d772 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,8 +1,4 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-hacking>=3.0.1,<3.1.0;python_version>='3.5' # Apache-2.0
+hacking>=6.1.0,<6.2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
-pycodestyle>=2.0.0,<2.6.0 # MIT
-flake8-import-order==0.11 # LGPLv3
+flake8-import-order>=0.18.0,<0.19.0 # LGPLv3