diff --git a/tox.ini b/tox.ini
index 61d2174..0bd1d28 100644
--- a/tox.ini
+++ b/tox.ini
@@ -64,6 +64,7 @@ setenv =
     PYTHONDEVMODE=1
     PIP_DISABLE_PIP_VERSION_CHECK=1
     PIP_PREFER_BINARY=1
+    UNSAFE_PYO3_SKIP_VERSION_CHECK=1
 skip_install = True
 changedir = {toxinidir}
 deps =