diff --git a/README.rst b/README.rst
index 55f411b6f..d1592003b 100644
--- a/README.rst
+++ b/README.rst
@@ -70,19 +70,19 @@ Execute all unit tests
 
 .. code-block:: shell
 
-    tox -e py36
+    tox -e py3
 
 Execute only backend tests
 
 .. code-block:: shell
 
-    tox -e py36 -- unit.backend
+    tox -e py3 -- unit.backend
 
 Execute only a single test
 
 .. code-block:: shell
 
-    tox -e py36 -- unit.backend.test_pdns4.PDNS4BackendTestCase.test_create_zone_success
+    tox -e py3 -- unit.backend.test_pdns4.PDNS4BackendTestCase.test_create_zone_success
 
 Contributing
 ------------
diff --git a/designate/tests/unit/README b/designate/tests/unit/README
index 35a1ece86..aca7f5691 100644
--- a/designate/tests/unit/README
+++ b/designate/tests/unit/README
@@ -2,5 +2,5 @@ This directory contains pure unit tests.
 
 Examples:
 
-tox -e py27 -- tests.unit
-tox -e py37 -- tests.unit.backend
\ No newline at end of file
+tox -e py3 -- tests.unit
+tox -e py3 -- tests.unit.backend
\ No newline at end of file