Moar parallel

.circleci/config.yml

@@ -109,17 +109,21 @@ jobs:
           path: dist
   integration:
     <<: *defaults
+    parallelism: 2
     environment:
       JEST_JUNIT_OUTPUT_NAME: results.txt
     steps:
       - *restore_git_cache
       - checkout
       - *restore_npm_cache
+      - *restore_build_cache
       - run:
           name: Integration
           environment:
               JEST_JUNIT_OUTPUT_DIR: test-results/integration
-          command: npm run test:integration -- --reporters="default" --reporters="jest-junit"
+          command: |
+            export TESTFILES=$(circleci tests glob "test/integration/*.test.js" | circleci tests split --split-by=timings)
+            $(npm bin)/jest ${TESTFILES} --reporters="default" --reporters="jest-junit"
       - store_test_results:
           path: test-results