diff --git a/.travis.yml b/.travis.yml
index f545c75..9d7fae6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,11 +10,11 @@ before_script:
 
 script:
   - docker build --pull --tag travis-build-cedar-14 --file $(pwd)/builds/cedar-14.Dockerfile .
-  - docker run --rm -e "STACK=cedar-14" -e "VENDOR_URL=$VENDOR_URL" travis-build-cedar-14 bash $TESTFOLDER
+  - docker run --rm -e "STACK=cedar-14" -e "BUILDPACK_VENDOR_URL=$BUILDPACK_VENDOR_URL" travis-build-cedar-14 bash $TESTFOLDER
   - docker build --pull --tag travis-build-heroku-16 --file $(pwd)/builds/heroku-16.Dockerfile .
-  - docker run --rm -e "STACK=heroku-16" -e "VENDOR_URL=$VENDOR_URL" travis-build-heroku-16 bash $TESTFOLDER
+  - docker run --rm -e "STACK=heroku-16" -e "BUILDPACK_VENDOR_URL=$BUILDPACK_VENDOR_URL" travis-build-heroku-16 bash $TESTFOLDER
   - docker build --pull --tag travis-build-heroku-18 --file $(pwd)/builds/heroku-18.Dockerfile .
-  - docker run --rm -e "STACK=heroku-18" -e "VENDOR_URL=$VENDOR_URL" travis-build-heroku-18 bash $TESTFOLDER
+  - docker run --rm -e "STACK=heroku-18" -e "BUILDPACK_VENDOR_URL=$BUILDPACK_VENDOR_URL" travis-build-heroku-18 bash $TESTFOLDER
 
 jobs:
   include:
@@ -28,11 +28,11 @@ jobs:
 env:
   matrix:
     - TESTFOLDER=test/run-deps
-    - TESTFOLDER=test/run-deps VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
+    - TESTFOLDER=test/run-deps BUILDPACK_VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
     - TESTFOLDER=test/run-versions
-    - TESTFOLDER=test/run-versions VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
+    - TESTFOLDER=test/run-versions BUILDPACK_VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
     - TESTFOLDER=test/run-features
-    - TESTFOLDER=test/run-features VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
+    - TESTFOLDER=test/run-features BUILDPACK_VENDOR_URL=https://lang-python.s3.amazonaws.com/staging/$STACK
   global:
     - HATCHET_RETRIES=3
     - IS_RUNNING_ON_CI=true