diff --git a/tox.ini b/tox.ini
index 8494acd..8de3846 100644
--- a/tox.ini
+++ b/tox.ini
@@ -82,7 +82,6 @@ download = True
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:py312]
 download = True
@@ -218,7 +217,6 @@ download = True
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:lint]
 basepython = python3.9