diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d3608f..a21ba18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## master (unreleased)
 
 * Revamped/Simplified Travis configuration.
+* Removed tox.ini reference to Python 3.3 builds.
 
 ## 1.0.0 (2020-05-05)
 
diff --git a/tox.ini b/tox.ini
index 331152f..671e596 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,8 +7,3 @@ commands =
     pytest -s {posargs}
 deps =
     .[tests]
-
-
-[testenv:py33]
-deps = .
-commands = pip freeze -l