diff --git a/packages/app/tests/stress/crdt-stress.e2e.ts b/packages/app/tests/stress/crdt-stress.e2e.ts
index e439e6f7..4c5429d9 100644
--- a/packages/app/tests/stress/crdt-stress.e2e.ts
+++ b/packages/app/tests/stress/crdt-stress.e2e.ts
@@ -45,7 +45,7 @@ test('S6: multi-turn stress — large content + user edits', async ({ page, api,
     await page.waitForFunction(
       (m: string) => window.__activeProvider?.document?.getText('source')?.toString()?.includes(m),
       marker,
-      { timeout: 10_000 },
+      { timeout: 30_000 },
     );
 
     const turnState = await page.evaluate(() => {
diff --git a/packages/app/tests/stress/editor-tabs.e2e.ts b/packages/app/tests/stress/editor-tabs.e2e.ts
index 8827ac9c..a478fea7 100644
--- a/packages/app/tests/stress/editor-tabs.e2e.ts
+++ b/packages/app/tests/stress/editor-tabs.e2e.ts
@@ -9,6 +9,7 @@ import {
   REQUIRED_FIXTURE_ENTRY_NAMES,
   test,
   type WorkerServer,
+  waitForActiveProviderSynced,
 } from './_helpers';
 
 function testId(): string {
@@ -689,12 +690,14 @@ test.describe('Editor tabs', () => {
 
     await page.goto(`/#/${barDoc}`);
     await expect(editorTabButtons(page, barLabel)).toHaveCount(1, { timeout: 10_000 });
+    await waitForActiveProviderSynced(page);
 
     await editorNewTabButton(page).click();
     await expect(closeNewTabButtons(page)).toHaveCount(1, { timeout: 10_000 });
     await sidebarTreeItem(page, `hello-${id}.mdx`).click();
     await expect(editorTabButtons(page, helloLabel)).toHaveCount(1, { timeout: 10_000 });
     await expectActiveTab(editorTabButtons(page, helloLabel).first());
+    await waitForActiveProviderSynced(page);
 
     await sidebarTreeItem(page, `bar-${id}.mdx`).click();