diff --git a/tox.ini b/tox.ini
index 425ed73ae3..96c16e9b5b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -16,6 +16,8 @@ deps = -rrequirements{/}tox-py.in
 install_command =
   {envpython} \
     {[python-cli-options]byte-errors} \
+    {[python-cli-options]some-isolation} \
+    {[python-cli-options]warnings-to-errors} \
     {toxinidir}{/}bin{/}pip_wrapper.py \
     '{toxinidir}{/}requirements{/}' \
     '{envname}' \