diff --git a/.travis.yml b/.travis.yml
index 8d31d036f4..d9e08cdc81 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,10 @@ env:
    - DISTRO=centos-7 OCAML_VERSION=4.03.0
    - DISTRO=fedora-24 OCAML_VERSION=4.02.3
    - DISTRO=alpine OCAML_VERSION=4.03.0
+   - DISTRO=ubuntu-16.04 OCAML_VERSION=4.04.0
+   - DISTRO=debian-unstable OCAML_VERSION=4.04.0
+   - DISTRO=centos-7 OCAML_VERSION=4.04.0
+   - DISTRO=alpine OCAML_VERSION=4.04.0
 notifications:
   webhooks:
     urls: