diff --git a/tox.ini b/tox.ini
index fa5f30f..079f88e 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
@@ -252,7 +251,6 @@ download = True
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:py313-dev-click{7.1,8.0,8.1}]
 download = True