diff --git a/.zuul.yaml b/.zuul.yaml
index 7051aeeb..affeb907 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -1,3 +1,3 @@
 - project:
     templates:
-      - python35-charm-jobs
+      - python36-charm-jobs
diff --git a/tox.ini b/tox.ini
index 004005fa..01095fc5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 # This file is managed centrally by release-tools and should not be modified
 # within individual charm repos.
 [tox]
-envlist = pep8,py35,py36
+envlist = pep8,py36
 skipsdist = True
 
 [testenv]
@@ -22,11 +22,6 @@ basepython = python2.7
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
-[testenv:py35]
-basepython = python3.5
-deps = -r{toxinidir}/requirements.txt
-       -r{toxinidir}/test-requirements.txt
-
 [testenv:py36]
 basepython = python3.6
 deps = -r{toxinidir}/requirements.txt