diff --git a/.travis.yml b/.travis.yml
index 2fe53c1..6f7f075 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,10 @@ language: python
 python:
   - "2.7"
   - "3.5"
+  - "3.6"
+  - "3.7"
+  - "3.8"
+  - "3.9"
 
 matrix:
   include:
@@ -10,11 +14,18 @@ matrix:
       env: TEST_SUITE=py27
     - python: "3.5"
       env: TEST_SUITE=py35
+    - python: "3.6"
+      env: TEST_SUITE=py36
+    - python: "3.7"
+      env: TEST_SUITE=py37
+    - python: "3.8"
+      env: TEST_SUITE=py38
+    - python: "3.9"
+      env: TEST_SUITE=py39
 
 install:
   - pip install tox
 
 # command to run tests
 script:
-  - tox -e pycodestyle
-  - tox -e $TEST_SUITE
+  - tox -e pycodestyle,$TEST_SUITE
diff --git a/tox.ini b/tox.ini
index 0125641..f0b09a6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py35,pycodestyle
+envlist = py27,py35,py36,py37,py38,py39,pycodestyle
 
 [testenv]
 setenv = VIRTUAL_ENV={envdir}