diff --git a/.travis.yml b/.travis.yml
index 1588ee1b..8c78f407 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ python:
   - 3.6
 
 env:
+  - JEDI_TEST_ENVIRONMENT=39
   - JEDI_TEST_ENVIRONMENT=38
   - JEDI_TEST_ENVIRONMENT=37
   - JEDI_TEST_ENVIRONMENT=36