1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 49e1690..2c0907c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,6 +17,7 @@ changedir = tests
 commands = mypy --show-error-codes --warn-unused-ignores mypy-ignore-cases/
 
 [testenv:pyparsing_packaging]
+basepython=py37
 deps=
     pretend
     pytest