diff --git a/tox.ini b/tox.ini
index 79c1e4f69..b495fb11d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,7 @@ deps =
     pytest-cov
 
 [testenv:cover3]
-basepython = python3.7
+basepython = python3.8
 commands =
     pytest --capture=no --cov=supervisor --cov-report=term-missing --cov-report=xml {posargs}
 deps =