diff --git a/circle.yml b/circle.yml
index edd8f46..f2a7d7a 100644
--- a/circle.yml
+++ b/circle.yml
@@ -27,17 +27,18 @@ dependencies:
   override:
     - composer global require "hirak/prestissimo:^0.3"
     - composer global require "consolidation/cgr"
-    # - cgr "pantheon-systems/terminus:^0.13.3"
-    - cgr "pantheon-systems/terminus:0.12.0"
+    - cgr "pantheon-systems/terminus:~0.13"
     - cgr "drush/drush:~8"
     - composer install
+    - mkdir -p ~/terminus/plugins; cd ~/terminus/plugins && git clone git@github.com:greg-1-anderson/terminus-composer.git
   post:
     - terminus auth login --machine-token=$TERMINUS_TOKEN
     - ./scripts/delete-old-multidevs
-test:
-  override:
     - terminus site create-env --to-env=$TERMINUS_ENV --from-env=dev
     - terminus site set-connection-mode --mode=sftp
+test:
+  override:
+    - terminus composer 'exec --working-dir=core "../vendor/bin/phpunit --testsuite=unit --exclude-group Composer,DependencyInjection,PageCache"'
     # Note that the behat-drush-endpoint has already been added to the dev environment of the test site.
     - ./scripts/run-behat
     # Note that if we do not delete our multidev environment here, then the