diff --git a/mistraldashboard/test/settings.py b/mistraldashboard/test/settings.py
index cd11fb7..37bba8f 100644
--- a/mistraldashboard/test/settings.py
+++ b/mistraldashboard/test/settings.py
@@ -16,5 +16,5 @@
 from horizon.test.settings import *  # noqa
 from openstack_dashboard.test.settings import *  # noqa
 
-INSTALLED_APPS = list(INSTALLED_APPS)
+INSTALLED_APPS = list(INSTALLED_APPS)  # noqa: F999
 INSTALLED_APPS.append('mistraldashboard')
diff --git a/test-requirements.txt b/test-requirements.txt
index c6e6ac4..87fced8 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,6 +4,10 @@
 
 # Hacking already pins down pep8, pyflakes and flake8
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+# remove this pyflakes from here once you bump the
+# hacking to 3.2.0 or above. hacking 3.2.0 takes
+# care of pyflakes version compatibilty.
+pyflakes>=2.1.1
 
 # Testing Requirements
 coverage!=4.4,>=4.0 # Apache-2.0