diff --git a/tox.ini b/tox.ini
index b977de05..7848b6c1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ deps =
      cov: coverage
      codecov: codecov
 
-passenv = CI GITHUB_* CODECOV_*
+passenv = CI,GITHUB_*,CODECOV_*
 extras = config
 
 # Run testsuite with coverage when '-cov' is in the env name
@@ -70,7 +70,7 @@ markers =
 
 [flake8]
 exclude = .git,__pycache__,build,dist,.tox
-ignore = A003, C901, E203, E266, E501, W503,D100,D101,D102,D102,D103,D104,D105,D106,D107,D203,D403,D213
+ignore = A003, C901, E203, E266, E501, W503,D100,D101,D102,D102,D103,D104,D105,D106,D107,D203,D403,D213,B028,B906
 # line length is intentionally set to 80 here because black uses Bugbear
 # See https://github.com/psf/black/blob/master/README.md#line-length for more details
 max-line-length = 80