diff --git a/packages/web-pkg/tests/unit/composables/webWorkers/deleteWorker/worker.spec.ts b/packages/web-pkg/tests/unit/composables/webWorkers/deleteWorker/worker.spec.ts
index 6052d964e5c..9ec11983632 100644
--- a/packages/web-pkg/tests/unit/composables/webWorkers/deleteWorker/worker.spec.ts
+++ b/packages/web-pkg/tests/unit/composables/webWorkers/deleteWorker/worker.spec.ts
@@ -21,6 +21,10 @@ const dataMock = {
   baseUrl: 'https://example.com'
 }
 
+// Real web workers can be slow to spin up and reply under heavy CI parallelism;
+// give these tests more headroom than the 5s default to avoid flaky timeouts.
+vi.setConfig({ testTimeout: 20000, hookTimeout: 20000 })
+
 describe('delete worker', () => {
   let worker: ReturnType<typeof useWebWorker>
   let webDavMock: ReturnType<typeof mock<WebDAV>>
diff --git a/packages/web-pkg/tests/unit/composables/webWorkers/exportAsPdfWorker/worker.spec.ts b/packages/web-pkg/tests/unit/composables/webWorkers/exportAsPdfWorker/worker.spec.ts
index 2977a5be65c..602f3bfdd84 100644
--- a/packages/web-pkg/tests/unit/composables/webWorkers/exportAsPdfWorker/worker.spec.ts
+++ b/packages/web-pkg/tests/unit/composables/webWorkers/exportAsPdfWorker/worker.spec.ts
@@ -42,6 +42,10 @@ vi.mock('../../../../../src/composables/webWorkers/exportAsPdfWorker/renderer',
   })
 }))
 
+// Real web workers can be slow to spin up and reply under heavy CI parallelism;
+// give these tests more headroom than the 5s default to avoid flaky timeouts.
+vi.setConfig({ testTimeout: 20000, hookTimeout: 20000 })
+
 describe('export as PDF worker', () => {
   let worker: ReturnType<typeof useWebWorker>
   let webDavMock: ReturnType<typeof mock<WebDAV>>
diff --git a/packages/web-pkg/tests/unit/composables/webWorkers/pasteWorker/worker.spec.ts b/packages/web-pkg/tests/unit/composables/webWorkers/pasteWorker/worker.spec.ts
index fa055b267cd..418f12b1c60 100644
--- a/packages/web-pkg/tests/unit/composables/webWorkers/pasteWorker/worker.spec.ts
+++ b/packages/web-pkg/tests/unit/composables/webWorkers/pasteWorker/worker.spec.ts
@@ -33,6 +33,10 @@ const transferDataMock = {
   baseUrl: 'https://example.com'
 }
 
+// Real web workers can be slow to spin up and reply under heavy CI parallelism;
+// give these tests more headroom than the 5s default to avoid flaky timeouts.
+vi.setConfig({ testTimeout: 20000, hookTimeout: 20000 })
+
 describe('paste worker', () => {
   let worker: ReturnType<typeof useWebWorker>
   let webDavMock: ReturnType<typeof mock<WebDAV>>
diff --git a/packages/web-pkg/tests/unit/composables/webWorkers/restoreWorker/worker.spec.ts b/packages/web-pkg/tests/unit/composables/webWorkers/restoreWorker/worker.spec.ts
index 08e5320f953..7e76711587b 100644
--- a/packages/web-pkg/tests/unit/composables/webWorkers/restoreWorker/worker.spec.ts
+++ b/packages/web-pkg/tests/unit/composables/webWorkers/restoreWorker/worker.spec.ts
@@ -21,7 +21,11 @@ const dataMock = {
   baseUrl: 'https://example.com'
 }
 
-describe('delete worker', () => {
+// Real web workers can be slow to spin up and reply under heavy CI parallelism;
+// give these tests more headroom than the 5s default to avoid flaky timeouts.
+vi.setConfig({ testTimeout: 20000, hookTimeout: 20000 })
+
+describe('restore worker', () => {
   let worker: ReturnType<typeof useWebWorker>
   let webDavMock: ReturnType<typeof mock<WebDAV>>
 
diff --git a/packages/web-pkg/tests/unit/composables/webWorkers/tokenTimerWorker/worker.spec.ts b/packages/web-pkg/tests/unit/composables/webWorkers/tokenTimerWorker/worker.spec.ts
index 0f8e186acd8..b13f91013b0 100644
--- a/packages/web-pkg/tests/unit/composables/webWorkers/tokenTimerWorker/worker.spec.ts
+++ b/packages/web-pkg/tests/unit/composables/webWorkers/tokenTimerWorker/worker.spec.ts
@@ -2,6 +2,10 @@ import { unref } from 'vue'
 import { useWebWorker } from '@vueuse/core'
 import TokenWorker from '../../../../../src/composables/webWorkers/tokenTimerWorker/worker?worker'
 
+// Real web workers can be slow to spin up and reply under heavy CI parallelism;
+// give these tests more headroom than the 5s default to avoid flaky timeouts.
+vi.setConfig({ testTimeout: 20000, hookTimeout: 20000 })
+
 describe('token timer worker', () => {
   let worker: ReturnType<typeof useWebWorker>