diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 395e9528e..5e2e3fcbf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -708,6 +708,14 @@ jobs:
             --run-ignored ignored-only
         env:
           DATABASE_URL: postgres://buzz:${{ env.BUZZ_TEST_POSTGRES_PASSWORD }}@localhost:5432/buzz
+      - name: EventQuery backend parity
+        run: |
+          cargo nextest run \
+            --archive-file target/ci/backend-integration-tests.tar.zst \
+            -E 'package(buzz-db) and test(/event::tests::event_query_parity_vectors_hold_for_postgres/)' \
+            --run-ignored ignored-only
+        env:
+          DATABASE_URL: postgres://buzz:${{ env.BUZZ_TEST_POSTGRES_PASSWORD }}@localhost:5432/buzz
       - name: NIP-ER reminder e2e
         # Feature e2e for NIP-ER (Event Reminders, kind:30300): write-path
         # validation, author-only read filtering, and scheduler delivery against