diff --git a/tox.ini b/tox.ini
index 65d57fee8..374ac2cf4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,9 +2,16 @@
 envlist = py{py,py3,36,37,38,39,310,311}{,-cryptographyMain,-cryptographyMinimum}{,-useWheel}{,-randomorder},py37-twistedTrunk,check-manifest,flake8,py36-mypy,docs,coverage-report
 
 [testenv]
-whitelist_externals =
+allowlist_externals =
     openssl
-passenv = ARCHFLAGS CFLAGS LC_ALL LDFLAGS PATH LD_LIBRARY_PATH TERM
+passenv =
+    ARCHFLAGS
+    CFLAGS
+    LC_ALL
+    LDFLAGS
+    PATH
+    LD_LIBRARY_PATH
+    TERM
 extras =
     test
 deps =
@@ -27,7 +34,6 @@ commands =
 deps =
     Twisted[all_non_platform] @ git+https://github.com/twisted/twisted
 setenv =
-passenv = ARCHFLAGS CFLAGS LC_ALL LDFLAGS PATH LD_LIBRARY_PATH TERM
 commands =
     python -c "import OpenSSL.SSL; print(OpenSSL.SSL.SSLeay_version(OpenSSL.SSL.SSLEAY_VERSION))"
     python -c "import cryptography; print(cryptography.__version__)"