diff --git a/.travis.yml b/.travis.yml
index c289a39e4..a4b5f2b19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,6 +31,7 @@ before_install:
 install:
   - 'npm install'
   - 'if [ -n "${ESLINT_VERSION}" ]; then ./tests/dep-time-travel.sh; fi'
+  - 'npm run pretest'
 
 script:
   - npm run tests-only