diff --git a/tox.ini b/tox.ini
index 3300b6a8..a4468c06 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ passenv =
     no_proxy
     NO_PROXY
     SERVICES_BRANCH
-whitelist_externals =
+allowlist_externals =
     bash
 setenv =
     PYTHONUNBUFFERED=1
@@ -36,7 +36,8 @@ commands =
 
 [testenv:pdf-docs]
 deps = {[testenv:docs]deps}
-whitelist_externals =
+allowlist_externals =
+  make
 commands =
   sphinx-build --keep-going -W -b latex doc/source doc/build/pdf
   make -C doc/build/pdf