diff --git a/.travis.yml b/.travis.yml
index 54f66cc1..1533b343 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,9 +7,12 @@ env:
     - EXTRA_REMOTES="https://github.com/mirage/mirage-dev.git"
     - TESTS=false
     - PINS="lwt.dev:https://github.com/mirage/lwt.git#tracing mirage-profile:https://github.com/mirage/mirage-profile.git"
-    - WITH_TRACING=1
   matrix:
-    - OCAML_VERSION=4.03 POST_INSTALL_HOOK="make MODE=unix && make testrun SUDO=sudo && make clean"
-    - OCAML_VERSION=4.03 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=xen  && make clean"
-    - OCAML_VERSION=4.02 POST_INSTALL_HOOK="make MODE=unix && make testrun SUDO=sudo && make clean"
-    - OCAML_VERSION=4.02 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=xen  && make clean"
+    - OCAML_VERSION=4.03 WITH_TRACING=1 POST_INSTALL_HOOK="make MODE=unix && make testrun SUDO=sudo && make clean"
+    - OCAML_VERSION=4.03 WITH_TRACING=1 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=xen  && make clean"
+    - OCAML_VERSION=4.03 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=ukvm  && make clean"
+    - OCAML_VERSION=4.03 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=virtio  && make clean"
+    - OCAML_VERSION=4.02 WITH_TRACING=1 POST_INSTALL_HOOK="make MODE=unix && make testrun SUDO=sudo && make clean"
+    - OCAML_VERSION=4.02 WITH_TRACING=1 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=xen  && make clean"
+    - OCAML_VERSION=4.02 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=ukvm  && make clean"
+    - OCAML_VERSION=4.02 UPDATE_GCC_BINUTILS=1 POST_INSTALL_HOOK="make MODE=virtio  && make clean"