diff --git a/.travis.yml b/.travis.yml
index d1b094af5..e01b83f41 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,8 @@ matrix:
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_mysql.cfg
     - python: 3.6
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
+    - python: 3.5
+      env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
     - python: 3.6
       env: JOB=plugins
     - python: 3.6
@@ -36,6 +38,9 @@ addons:
           - enchant
           - myspell-de-de
           - aspell-en
+          - sqlite3
+  sources:
+    - travis-ci/sqlite3
 branches:
   except:
   - /^weblate-.*/