diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 4c3b5a2..35c62f8 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -38,11 +38,11 @@ Automated tests
 -------------------
 
 Tests are run with ``tox`` and ``pytest``.
-To run tests for a specific Python version, such as Python 3.6:
+To run tests for a specific Python version, such as Python 3.10:
 
 .. code-block:: bash
 
-	$ tox -e py36
+	$ tox -e py310
 
 
 To run tests for all Python versions, simply run:
diff --git a/doc-source/contributing.rst b/doc-source/contributing.rst
index f155af0..d3e8a02 100644
--- a/doc-source/contributing.rst
+++ b/doc-source/contributing.rst
@@ -37,11 +37,11 @@ Automated tests
 -------------------
 
 Tests are run with ``tox`` and ``pytest``.
-To run tests for a specific Python version, such as Python 3.6:
+To run tests for a specific Python version, such as Python 3.10:
 
 .. prompt:: bash
 
-	tox -e py36
+	tox -e py310
 
 
 To run tests for all Python versions, simply run: