circle.yml in twilio_base-1.9.0 vs circle.yml in twilio_base-1.11.11

@@ -1,18 +1,21 @@
 version: 2
 jobs:
   build:
+    working_directory: ~/twilio_base
     docker:
       - image: circleci/ruby:2.5.1-node-browsers
         environment:
           PGHOST: 127.0.0.1
-          PGUSER: twilio_base
+          PGUSER: postgres
           RAILS_ENV: test
-      - image: postgres:9.5
+          RACK_ENV: test
+
+      - image: circleci/postgres:9.6.2-alpine
         environment:
-          POSTGRES_USER: twilio_base
+          POSTGRES_USER: postgres
           POSTGRES_DB: twilio_base_test
-          POSTGRES_PASSWORD: ""
+
     steps:
       - checkout
       - run: bundle install
       - run: cp spec/twilio_base_dummy/config/database.example.yml spec/twilio_base_dummy/config/database.yml
       - run: bundle exec rake db:setup