diff --git a/test-requirements.txt b/test-requirements.txt
index b8076a6f..42767a26 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,9 +5,10 @@ coverage!=4.4,>=4.0 # Apache-2.0
 flake8-import-order>=0.18.0,<0.19.0 # LGPLv3
 oslotest>=3.2.0 # Apache-2.0
 stestr>=1.0.0 # Apache-2.0
-pylint>=2.6.0,!=4.0.0,!=4.0.1 # GPLv2
+pylint>=2.6.0,<4.0.0 # GPLv2
 testresources>=2.0.0 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 WebTest>=2.0.27 # MIT
 testtools>=2.2.0 # MIT
+PyMySQL>=0.7.6 # MIT License
 neutron>=23.0.0.0b3 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 7a32ef86..fb16ef69 100644
--- a/tox.ini
+++ b/tox.ini
@@ -60,6 +60,9 @@ commands = false
 setenv = {[testenv:functional]setenv}
          {[testenv:dsvm]setenv}
 deps = {[testenv:functional]deps}
+passenv =
+  {[testenv]passenv}
+  OS_TEST_DBAPI_ADMIN_CONNECTION
 commands =
   stestr run --isolated {posargs}