diff --git a/packages/gatsby/src/utils/worker/__tests__/test-helpers/create-test-worker.ts b/packages/gatsby/src/utils/worker/__tests__/test-helpers/create-test-worker.ts
index 9da78204bedd2..dc01f0bde029a 100644
--- a/packages/gatsby/src/utils/worker/__tests__/test-helpers/create-test-worker.ts
+++ b/packages/gatsby/src/utils/worker/__tests__/test-helpers/create-test-worker.ts
@@ -10,7 +10,7 @@ export function createTestWorker(): GatsbyTestWorkerPool {
     {
       numWorkers: 1,
       env: {
-        FORCE_TEST_DATABASE_ID: process.env.JEST_WORKER_ID,
+        FORCE_TEST_DATABASE_ID: process.env.GATSBY_WORKER_ID,
         GATSBY_WORKER_POOL_WORKER: `true`,
         NODE_OPTIONS: `--require ${require.resolve(`./ts-register`)}`,
       },