fix: remove parallel for small tests

Author: parker-snyk

.circleci/config.yml

@@ -44,7 +44,7 @@ windows_big: &windows_big
     # we've pinned the version because without it, it uses "current" (at the time of writing, "2023.06.1"),
     # which has a broken Docker installation. See https://discuss.circleci.com/t/build-failures-when-running-docker-on-junes-windows-executor/48605
     # TODO: check if it works again with the next release and unpin the version.
-    version: 2023.05.1
+    version: "2023.05.1"
   parameters:
     node_version:
       type: string
@@ -170,18 +170,13 @@ jobs:
             - dist/
   test:
     <<: *defaults
-    parallelism: 4  # Run tests across 4 containers
     steps:
       - checkout_with_cache
       - setup_remote_docker:
           docker_layer_caching: true
       - attach_workspace:
           at: ~/snyk-docker-plugin
-      - run:
-          name: Run tests in parallel
-          command: |
-            TEST=$(npx jest --listTests | circleci tests split --split-by=timings)
-            npm run test-jest -- $TEST >> test-logs.txt 2>&1
+      - run: npm run test-jest > test-logs.txt 2>&1
       - store_artifacts:
           path: test-logs.txt
           destination: test-logs