diff --git a/tox.ini b/tox.ini
index c9d376d94..cddc0137c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{27,33,34,35,py},py{27,34}-flake8,docstrings
+envlist = py{27,35,36,37,38,py},py{27,38}-flake8,docstrings
 minversion = 2.5.0
 
 [testenv]
@@ -8,7 +8,7 @@ pip_pre = False
 deps =
     requests{env:REQUESTS_VERSION:>=2.0}
     mock==1.0.1
-    pytest>=2.3.5
+    pytest>=4.6.6
     betamax>=0.5.1
     betamax_matchers>=0.3.0
     pypy,py27: unittest2
@@ -19,13 +19,13 @@ deps =
     flake8
 commands = flake8 {posargs} github3/ tests/unit/ tests/integration/
 
-[testenv:py34-flake8]
+[testenv:py38-flake8]
 deps =
     {[testenv:py27-flake8]deps}
 commands = flake8 {posargs} github3/ tests/unit/ tests/integration/
 
 [testenv:notebooks]
-basepython = python3.4
+basepython = python3.8
 deps =
     ipython[notebook]
 commands = python tests/nbtest.py