diff --git a/tox.ini b/tox.ini
index 16ea8f9ba..d2f253fb3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,12 +27,14 @@ commands=
     pytest -Wall --durations 25 {posargs}
 
 [testenv:flake8]
+basepython = python3
 description =
     Run style checks.
 commands =
     flake8
 
 [testenv:pylint]
+basepython = python3
 description =
     Run source code analyzer.
 deps =
@@ -42,6 +44,7 @@ commands =
     pylint --rcfile utils/pylintrc sphinx
 
 [testenv:coverage]
+basepython = python3
 description =
     Run code coverage checks.
 setenv =
@@ -51,6 +54,7 @@ commands =
     coverage report
 
 [testenv:mypy]
+basepython = python3
 description =
     Run type checks.
 deps =
@@ -59,6 +63,7 @@ commands=
     mypy sphinx/
 
 [testenv:docs]
+basepython = python3
 description =
     Build documentation.
 commands =