Back out Python 3.9 for now

py.test doesn't work with newer Ubuntu or Python 3.9 for some reason. Back it out for now.
salilab · Nov 13, 2020 · 2f9323d · 2f9323d
1 parent ea78ea2
commit 2f9323d
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,10 +1,10 @@
+os: linux
 language: python
-dist: focal
+dist: bionic
 python:
   - 3.6
   - 3.7
   - 3.8
-  - 3.9
 addons:
   apt:
     packages: