diff --git a/.travis.yml b/.travis.yml
index 5e15ddadb..6facec8e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,12 @@
 language: python
+python:
+  - "3.6"      # current default Python on Travis CI
+  - "3.7"
+  - "3.8"
+  - "nightly"  # nightly build
+# command to install dependencies
 install:
-  sudo apt-get install python3.6
+  - pip install -r requirements.txt
+# command to run tests
+script:
+  - pytest