diff --git a/.slugignore b/.slugignore
new file mode 100644
index 00000000..8ee01d32
--- /dev/null
+++ b/.slugignore
@@ -0,0 +1 @@
+yarn.lock
diff --git a/.travis.yml b/.travis.yml
index 08e5da1c..3c847b8a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ cache:
   - node_modules
 git:
   depth: 3
-script: cross-env NODE_ENV=test ./node_modules/.bin/mocha --ui bdd --reporter spec
+script: npm run build && cross-env NODE_ENV=test ./node_modules/.bin/mocha --ui bdd --reporter spec
   --colors --compilers js:babel-core/register server/tests --recursive
 after_script:
 - npm report-coverage