diff --git a/tox.ini b/tox.ini
index 58aba19..94a47c9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -98,6 +98,7 @@ setenv =
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
+    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:py312]
 setenv =
@@ -263,6 +264,7 @@ setenv =
 setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
+    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 
 [testenv:py312-dev-sphinx{3.3,3.4,3.5,4.0,4.1,4.2,4.3,4.4,4.5,5.0,5.1,5.2,5.3,6.0,6.1,6.2,7.0}]
 setenv =