diff --git a/tox.ini b/tox.ini
index cc70f4c..4687ec6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -74,7 +74,6 @@ download = True
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:py312]
 download = True
@@ -269,7 +268,6 @@ download = True
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
-    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv]
 setenv =