diff --git a/tox.ini b/tox.ini
index b768496..9af0b83 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ skipsdist = True
 ignore_basepython_conflict = True
 
 [testenv]
+basepython = python3.8
 usedevelop = True
 passenv =
   TERM