fix(playwright): address review feedback on de-flake change

Three follow-ups from /review-code on the list-spec de-flake work:

- Revert toast assertions to expect(toast.getSuccess()).toBeVisible().
  The previous switch to toast.getSuccess().waitFor({ state: 'visible' })
  was a no-op: both APIs poll for visibility, so neither catches a fast
  auto-dismiss between polls. The expect() form fails as an assertion
  (clearer diff, counted in reports). Misleading "use waitFor so we
  detect auto-dismiss" comments are gone too.

- Drop redundant waitFor({ state: 'visible' }) calls in BulkSelect's
  selectRow / deselectRow / clickAction. Locator.check()/click() already
  auto-wait for visibility, stability, and enabled state. The
  expect(checkbox).toBeChecked() assertion -- which is the actual race
  guard against React state propagation -- stays.

- Expand the DeleteConfirmationModal.clickDelete docstring to explain
  why it bypasses Modal.clickFooterButton: the footer button label is
  i18n'd, so name-based lookups break in non-English locales.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

superset-frontend/playwright/components/ListView/BulkSelect.ts

@@ -17,12 +17,13 @@
  * under the License.
  */
 
-import { Locator, Page } from '@playwright/test';
+import { Locator, Page, expect } from '@playwright/test';
 import { Button, Checkbox, Table } from '../core';
 
 const BULK_SELECT_SELECTORS = {
   CONTROLS: '[data-test="bulk-select-controls"]',
   ACTION: '[data-test="bulk-select-action"]',
+  HEADER_TOGGLE: '[data-test="header-toggle-all"]',
 } as const;
 
 /**
@@ -56,10 +57,17 @@ export class BulkSelect {
   }
 
   /**
-   * Enables bulk selection mode by clicking the toggle button
+   * Enables bulk selection mode by clicking the toggle button.
+   *
+   * Waits for the bulk-select column header checkbox to render so the next
+   * row interaction does not race the table re-render that adds the
+   * checkbox column.
    */
   async enable(): Promise<void> {
     await this.getToggleButton().click();
+    await this.page
+      .locator(BULK_SELECT_SELECTORS.HEADER_TOGGLE)
+      .waitFor({ state: 'visible' });
   }
 
   /**
@@ -72,19 +80,27 @@ export class BulkSelect {
   }
 
   /**
-   * Selects a row's checkbox in bulk select mode
+   * Selects a row's checkbox in bulk select mode.
+   * Asserts the checkbox is checked afterwards so any state-update race
+   * surfaces here rather than as a missing bulk-action button later.
    * @param rowName - The name/text identifying the row to select
    */
   async selectRow(rowName: string): Promise<void> {
-    await this.getRowCheckbox(rowName).check();
+    const checkbox = this.getRowCheckbox(rowName);
+    await checkbox.check();
+    await expect(checkbox.element).toBeChecked();
   }
 
   /**
-   * Deselects a row's checkbox in bulk select mode
+   * Deselects a row's checkbox in bulk select mode.
+   * Mirrors selectRow: asserts the unchecked state so any lingering selection
+   * surfaces here rather than as a stale bulk-action count later.
    * @param rowName - The name/text identifying the row to deselect
    */
   async deselectRow(rowName: string): Promise<void> {
-    await this.getRowCheckbox(rowName).uncheck();
+    const checkbox = this.getRowCheckbox(rowName);
+    await checkbox.uncheck();
+    await expect(checkbox.element).not.toBeChecked();
   }
 
   /**
@@ -107,10 +123,11 @@ export class BulkSelect {
   }
 
   /**
-   * Clicks a bulk action button by name (e.g., "Export", "Delete")
+   * Clicks a bulk action button by name (e.g., "Export", "Delete").
    * @param actionName - The name of the bulk action to click
    */
   async clickAction(actionName: string): Promise<void> {
-    await this.getActionButton(actionName).click();
+    const button = this.getActionButton(actionName);
+    await button.click();
   }
 }

superset-frontend/playwright/components/modals/DeleteConfirmationModal.ts

@@ -17,6 +17,7 @@
  * under the License.
  */
 
+import { expect } from '@playwright/test';
 import { Modal, Input } from '../core';
 
 /**
@@ -27,7 +28,8 @@ import { Modal, Input } from '../core';
  */
 export class DeleteConfirmationModal extends Modal {
   private static readonly SELECTORS = {
-    CONFIRMATION_INPUT: 'input[type="text"]',
+    CONFIRMATION_INPUT: '[data-test="delete-modal-input"]',
+    CONFIRM_BUTTON: '[data-test="modal-confirm-button"]',
   };
 
   /**
@@ -36,12 +38,16 @@ export class DeleteConfirmationModal extends Modal {
   private get confirmationInput(): Input {
     return new Input(
       this.page,
-      this.body.locator(DeleteConfirmationModal.SELECTORS.CONFIRMATION_INPUT),
+      this.element.locator(
+        DeleteConfirmationModal.SELECTORS.CONFIRMATION_INPUT,
+      ),
     );
   }
 
   /**
    * Fills the confirmation input with the specified text.
+   * Waits for the input to be visible before filling so callers don't race
+   * with the modal's open animation / focus effect.
    *
    * @param confirmationText - The text to type
    * @param options - Optional fill options (timeout, force)
@@ -57,11 +63,25 @@ export class DeleteConfirmationModal extends Modal {
     confirmationText: string,
     options?: { timeout?: number; force?: boolean },
   ): Promise<void> {
+    await this.confirmationInput.element.waitFor({
+      state: 'visible',
+      timeout: options?.timeout,
+    });
     await this.confirmationInput.fill(confirmationText, options);
   }
 
   /**
-   * Clicks the Delete button in the footer
+   * Clicks the Delete button in the footer.
+   *
+   * Targets the confirm button by data-test rather than going through
+   * Modal.clickFooterButton, which finds buttons by their visible text. The
+   * button label is i18n'd ("Delete" / "Supprimer" / …) so name-based lookups
+   * break in non-English locales.
+   *
+   * Also waits for the button to become enabled before clicking: it is
+   * disabled until the confirmation text matches "DELETE", and React's state
+   * update from fillConfirmationInput is asynchronous, so an immediate click
+   * can race the disabled→enabled transition.
    *
    * @param options - Optional click options (timeout, force, delay)
    */
@@ -70,6 +90,10 @@ export class DeleteConfirmationModal extends Modal {
     force?: boolean;
     delay?: number;
   }): Promise<void> {
-    await this.clickFooterButton('Delete', options);
+    const confirmButton = this.element.locator(
+      DeleteConfirmationModal.SELECTORS.CONFIRM_BUTTON,
+    );
+    await expect(confirmButton).toBeEnabled({ timeout: options?.timeout });
+    await confirmButton.click(options);
   }
 }

superset-frontend/playwright/tests/chart/chart-list.spec.ts

@@ -32,6 +32,7 @@ import {
   expectStatusOneOf,
   expectValidExportZip,
 } from '../../helpers/api/assertions';
+import { TIMEOUT } from '../../utils/constants';
 
 /**
  * Extend testWithAssets with chartListPage navigation (beforeEach equivalent).
@@ -62,8 +63,11 @@ test('should delete a chart with confirmation', async ({
   await chartListPage.goto();
   await chartListPage.waitForTableLoad();
 
-  // Verify chart is visible in list
-  await expect(chartListPage.getChartRow(chartName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created chart appears.
+  await expect(chartListPage.getChartRow(chartName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Click delete action button
   await chartListPage.clickDeleteAction(chartName);
@@ -81,12 +85,12 @@ test('should delete a chart with confirmation', async ({
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
-  // Verify chart is removed from list
-  await expect(chartListPage.getChartRow(chartName)).not.toBeVisible();
+  // Verify chart is removed from list (deleted rows leave the DOM)
+  await expect(chartListPage.getChartRow(chartName)).toHaveCount(0);
 
   // Backend verification: API returns 404
   await expectDeleted(page, ENDPOINTS.CHART, chartId, {
@@ -111,8 +115,11 @@ test('should edit chart name via properties modal', async ({
   await chartListPage.goto();
   await chartListPage.waitForTableLoad();
 
-  // Verify chart is visible in list
-  await expect(chartListPage.getChartRow(chartName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created chart appears.
+  await expect(chartListPage.getChartRow(chartName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Click edit action to open properties modal
   await chartListPage.clickEditAction(chartName);
@@ -137,7 +144,7 @@ test('should edit chart name via properties modal', async ({
   // Modal should close
   await propertiesModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
@@ -164,8 +171,11 @@ test('should export a chart as a zip file', async ({
   await chartListPage.goto();
   await chartListPage.waitForTableLoad();
 
-  // Verify chart is visible in list
-  await expect(chartListPage.getChartRow(chartName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created chart appears.
+  await expect(chartListPage.getChartRow(chartName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Set up API response intercept for export endpoint
   const exportResponsePromise = waitForGet(page, ENDPOINTS.CHART_EXPORT);
@@ -202,9 +212,14 @@ test('should bulk delete multiple charts', async ({
   await chartListPage.goto();
   await chartListPage.waitForTableLoad();
 
-  // Verify both charts are visible in list
-  await expect(chartListPage.getChartRow(chart1.name)).toBeVisible();
-  await expect(chartListPage.getChartRow(chart2.name)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created charts appear.
+  await expect(chartListPage.getChartRow(chart1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(chartListPage.getChartRow(chart2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Enable bulk select mode
   await chartListPage.clickBulkSelectButton();
@@ -229,13 +244,13 @@ test('should bulk delete multiple charts', async ({
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
-  // Verify both charts are removed from list
-  await expect(chartListPage.getChartRow(chart1.name)).not.toBeVisible();
-  await expect(chartListPage.getChartRow(chart2.name)).not.toBeVisible();
+  // Verify both charts are removed from list (deleted rows leave the DOM)
+  await expect(chartListPage.getChartRow(chart1.name)).toHaveCount(0);
+  await expect(chartListPage.getChartRow(chart2.name)).toHaveCount(0);
 
   // Backend verification: Both return 404
   for (const chart of [chart1, chart2]) {
@@ -259,8 +274,11 @@ test('should edit chart name from card view', async ({ page, testAssets }) => {
   await cardListPage.gotoCardView();
   await cardListPage.waitForCardLoad();
 
-  // Verify chart card is visible
-  await expect(cardListPage.getChartCard(chartName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created chart card appears.
+  await expect(cardListPage.getChartCard(chartName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Open card dropdown and click edit
   await cardListPage.clickCardEditAction(chartName);
@@ -285,13 +303,16 @@ test('should edit chart name from card view', async ({ page, testAssets }) => {
   // Modal should close
   await propertiesModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
   // Verify the renamed card appears in card view and old name is gone
-  await expect(cardListPage.getChartCard(newName)).toBeVisible();
-  await expect(cardListPage.getChartCard(chartName)).not.toBeVisible();
+  // (the old card name is removed from the DOM after the rename re-render).
+  await expect(cardListPage.getChartCard(newName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(cardListPage.getChartCard(chartName)).toHaveCount(0);
 
   // Backend verification: API returns updated name
   const response = await apiGetChart(page, chartId);
@@ -304,6 +325,11 @@ test('should bulk export multiple charts', async ({
   chartListPage,
   testAssets,
 }) => {
+  // Chains create×2 → refresh → bulk select → export. Matches the
+  // sibling bulk-delete test's budget so the export response wait below
+  // can exceed the 30s default without hitting the test timeout.
+  test.setTimeout(TIMEOUT.SLOW_TEST);
+
   // Create 2 throwaway charts for bulk export
   const [chart1, chart2] = await Promise.all([
     createTestChart(page, testAssets, test.info(), {
@@ -318,9 +344,14 @@ test('should bulk export multiple charts', async ({
   await chartListPage.goto();
   await chartListPage.waitForTableLoad();
 
-  // Verify both charts are visible in list
-  await expect(chartListPage.getChartRow(chart1.name)).toBeVisible();
-  await expect(chartListPage.getChartRow(chart2.name)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created charts appear.
+  await expect(chartListPage.getChartRow(chart1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(chartListPage.getChartRow(chart2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Enable bulk select mode
   await chartListPage.clickBulkSelectButton();
@@ -329,8 +360,12 @@ test('should bulk export multiple charts', async ({
   await chartListPage.selectChartCheckbox(chart1.name);
   await chartListPage.selectChartCheckbox(chart2.name);
 
-  // Set up API response intercept for export endpoint
-  const exportResponsePromise = waitForGet(page, ENDPOINTS.CHART_EXPORT);
+  // Set up API response intercept BEFORE the click that triggers it.
+  // Exports of multiple charts can take longer than 30s under load,
+  // so use SLOW_TEST instead of the default test-timeout-bound budget.
+  const exportResponsePromise = waitForGet(page, ENDPOINTS.CHART_EXPORT, {
+    timeout: TIMEOUT.SLOW_TEST,
+  });
 
   // Click bulk export action
   await chartListPage.clickBulkAction('Export');

superset-frontend/playwright/tests/dashboard/dashboard-list.spec.ts

@@ -68,33 +68,34 @@ test('should delete a dashboard with confirmation', async ({
   await dashboardListPage.goto();
   await dashboardListPage.waitForTableLoad();
 
-  // Verify dashboard is visible in list
-  await expect(dashboardListPage.getDashboardRow(dashboardName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dashboard appears.
+  await expect(dashboardListPage.getDashboardRow(dashboardName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Click delete action button
   await dashboardListPage.clickDeleteAction(dashboardName);
 
   // Delete confirmation modal should appear
   const deleteModal = new DeleteConfirmationModal(page);
-  await deleteModal.waitForVisible();
+  await deleteModal.waitForReady();
 
   // Type "DELETE" to confirm
   await deleteModal.fillConfirmationInput('DELETE');
 
-  // Click the Delete button
+  // Click the Delete button (waits for it to become enabled)
   await deleteModal.clickDelete();
 
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
   // Verify dashboard is removed from list
-  await expect(
-    dashboardListPage.getDashboardRow(dashboardName),
-  ).not.toBeVisible();
+  await expect(dashboardListPage.getDashboardRow(dashboardName)).toHaveCount(0);
 
   // Backend verification: API returns 404
   await expectDeleted(page, ENDPOINTS.DASHBOARD, dashboardId, {
@@ -119,8 +120,11 @@ test('should export a dashboard as a zip file', async ({
   await dashboardListPage.goto();
   await dashboardListPage.waitForTableLoad();
 
-  // Verify dashboard is visible in list
-  await expect(dashboardListPage.getDashboardRow(dashboardName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dashboard appears.
+  await expect(dashboardListPage.getDashboardRow(dashboardName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Set up API response intercept for export endpoint
   const exportResponsePromise = waitForGet(page, ENDPOINTS.DASHBOARD_EXPORT);
@@ -157,13 +161,14 @@ test('should bulk delete multiple dashboards', async ({
   await dashboardListPage.goto();
   await dashboardListPage.waitForTableLoad();
 
-  // Verify both dashboards are visible in list
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard1.name),
-  ).toBeVisible();
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard2.name),
-  ).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dashboards appear.
+  await expect(dashboardListPage.getDashboardRow(dashboard1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(dashboardListPage.getDashboardRow(dashboard2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Enable bulk select mode
   await dashboardListPage.clickBulkSelectButton();
@@ -188,17 +193,17 @@ test('should bulk delete multiple dashboards', async ({
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
-  // Verify both dashboards are removed from list
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard1.name),
-  ).not.toBeVisible();
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard2.name),
-  ).not.toBeVisible();
+  // Verify both dashboards are removed from list (deleted rows leave the DOM)
+  await expect(dashboardListPage.getDashboardRow(dashboard1.name)).toHaveCount(
+    0,
+  );
+  await expect(dashboardListPage.getDashboardRow(dashboard2.name)).toHaveCount(
+    0,
+  );
 
   // Backend verification: Both return 404
   for (const dashboard of [dashboard1, dashboard2]) {
@@ -213,6 +218,11 @@ test('should bulk export multiple dashboards', async ({
   dashboardListPage,
   testAssets,
 }) => {
+  // Chains create×2 → refresh → bulk select → export. Matches the
+  // sibling bulk-delete test's budget so the export response wait below
+  // can exceed the 30s default without hitting the test timeout.
+  test.setTimeout(TIMEOUT.SLOW_TEST);
+
   // Create 2 throwaway dashboards for bulk export
   const [dashboard1, dashboard2] = await Promise.all([
     createTestDashboard(page, testAssets, test.info(), {
@@ -227,25 +237,30 @@ test('should bulk export multiple dashboards', async ({
   await dashboardListPage.goto();
   await dashboardListPage.waitForTableLoad();
 
-  // Verify both dashboards are visible in list
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard1.name),
-  ).toBeVisible();
-  await expect(
-    dashboardListPage.getDashboardRow(dashboard2.name),
-  ).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dashboards appear.
+  await expect(dashboardListPage.getDashboardRow(dashboard1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(dashboardListPage.getDashboardRow(dashboard2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
-  // Enable bulk select mode
+  // Enable bulk select mode (waits for the checkbox column to render)
   await dashboardListPage.clickBulkSelectButton();
 
-  // Select both dashboards
+  // Select both dashboards (each call asserts the checkbox is checked)
   await dashboardListPage.selectDashboardCheckbox(dashboard1.name);
   await dashboardListPage.selectDashboardCheckbox(dashboard2.name);
 
-  // Set up API response intercept for export endpoint
-  const exportResponsePromise = waitForGet(page, ENDPOINTS.DASHBOARD_EXPORT);
+  // Set up API response intercept BEFORE the click that triggers it.
+  // Exports of multiple dashboards can take longer than 30s under load,
+  // so use SLOW_TEST instead of the default test-timeout-bound budget.
+  const exportResponsePromise = waitForGet(page, ENDPOINTS.DASHBOARD_EXPORT, {
+    timeout: TIMEOUT.SLOW_TEST,
+  });
 
-  // Click bulk export action
+  // Click bulk export action (waits for the action button to render)
   await dashboardListPage.clickBulkAction('Export');
 
   // Wait for export API response and validate zip contains both dashboards
@@ -293,12 +308,12 @@ test.describe('import dashboard', () => {
       label: `Dashboard ${dashboardId}`,
     });
 
-    // Refresh to confirm dashboard is no longer in the list
+    // Refresh to confirm dashboard is no longer in the list (deleted rows leave the DOM)
     await dashboardListPage.goto();
     await dashboardListPage.waitForTableLoad();
-    await expect(
-      dashboardListPage.getDashboardRow(dashboardName),
-    ).not.toBeVisible();
+    await expect(dashboardListPage.getDashboardRow(dashboardName)).toHaveCount(
+      0,
+    );
 
     // Click the import button
     await dashboardListPage.clickImportButton();
@@ -350,7 +365,7 @@ test.describe('import dashboard', () => {
     // Modal should close on success
     await importModal.waitForHidden({ timeout: TIMEOUT.FILE_IMPORT });
 
-    // Verify success toast appears
+    // Verify success toast appears.
     const toast = new Toast(page);
     await expect(toast.getSuccess()).toBeVisible({ timeout: 10000 });
 
@@ -358,10 +373,11 @@ test.describe('import dashboard', () => {
     await dashboardListPage.goto();
     await dashboardListPage.waitForTableLoad();
 
-    // Verify dashboard appears in list
-    await expect(
-      dashboardListPage.getDashboardRow(dashboardName),
-    ).toBeVisible();
+    // The list query is asynchronous; allow extra time on slow CI before the
+    // freshly-imported dashboard appears.
+    await expect(dashboardListPage.getDashboardRow(dashboardName)).toBeVisible({
+      timeout: TIMEOUT.API_RESPONSE,
+    });
 
     // Track for cleanup: look up the reimported dashboard by title
     const reimported = await getDashboardByName(page, dashboardName);

superset-frontend/playwright/tests/dataset/dataset-list.spec.ts

@@ -107,8 +107,11 @@ test('should delete a dataset with confirmation', async ({
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
 
-  // Verify dataset is visible in list
-  await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dataset appears.
+  await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Click delete action button
   await datasetListPage.clickDeleteAction(datasetName);
@@ -126,14 +129,13 @@ test('should delete a dataset with confirmation', async ({
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears with correct message
+  // Verify success toast appears with correct message.
   const toast = new Toast(page);
-  const successToast = toast.getSuccess();
-  await expect(successToast).toBeVisible();
+  await expect(toast.getSuccess()).toBeVisible();
   await expect(toast.getMessage()).toContainText('Deleted');
 
-  // Verify dataset is removed from list
-  await expect(datasetListPage.getDatasetRow(datasetName)).not.toBeVisible();
+  // Verify dataset is removed from list (deleted rows leave the DOM)
+  await expect(datasetListPage.getDatasetRow(datasetName)).toHaveCount(0);
 
   // Verify via API that dataset no longer exists (404)
   await expectDeleted(page, ENDPOINTS.DATASET, datasetId, {
@@ -155,10 +157,13 @@ test('should duplicate a dataset with new name', async ({
   );
   const duplicateName = `duplicate_${Date.now()}_${test.info().parallelIndex}`;
 
-  // Navigate to list and verify original dataset is visible
+  // Navigate to list and verify original dataset is visible.
+  // The list query is asynchronous; allow extra time on slow CI.
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
-  await expect(datasetListPage.getDatasetRow(originalName)).toBeVisible();
+  await expect(datasetListPage.getDatasetRow(originalName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Set up response intercept to capture duplicate dataset ID
   const duplicateResponsePromise = waitForPost(
@@ -201,9 +206,14 @@ test('should duplicate a dataset with new name', async ({
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
 
-  // Verify both datasets exist in list
-  await expect(datasetListPage.getDatasetRow(originalName)).toBeVisible();
-  await expect(datasetListPage.getDatasetRow(duplicateName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // duplicate appears alongside the original.
+  await expect(datasetListPage.getDatasetRow(originalName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(datasetListPage.getDatasetRow(duplicateName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // API Verification: Fetch both datasets via detail API for consistent comparison
   // (list API may return undefined for fields that detail API returns as null)
@@ -256,6 +266,11 @@ test('should export multiple datasets via bulk select action', async ({
   datasetListPage,
   testAssets,
 }) => {
+  // Chains create×2 → refresh → bulk select → export. Matches the
+  // sibling bulk-delete test's budget so the export response wait below
+  // can exceed the 30s default without hitting the test timeout.
+  test.setTimeout(TIMEOUT.SLOW_TEST);
+
   // Create 2 throwaway datasets for bulk export
   const [dataset1, dataset2] = await Promise.all([
     createTestDataset(page, testAssets, test.info(), {
@@ -270,9 +285,14 @@ test('should export multiple datasets via bulk select action', async ({
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
 
-  // Verify both datasets are visible in list
-  await expect(datasetListPage.getDatasetRow(dataset1.name)).toBeVisible();
-  await expect(datasetListPage.getDatasetRow(dataset2.name)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created datasets appear.
+  await expect(datasetListPage.getDatasetRow(dataset1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(datasetListPage.getDatasetRow(dataset2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Enable bulk select mode
   await datasetListPage.clickBulkSelectButton();
@@ -281,8 +301,12 @@ test('should export multiple datasets via bulk select action', async ({
   await datasetListPage.selectDatasetCheckbox(dataset1.name);
   await datasetListPage.selectDatasetCheckbox(dataset2.name);
 
-  // Set up API response intercept for export endpoint
-  const exportResponsePromise = waitForGet(page, ENDPOINTS.DATASET_EXPORT);
+  // Set up API response intercept BEFORE the click that triggers it.
+  // Exports of multiple datasets can take longer than 30s under load,
+  // so use SLOW_TEST instead of the default test-timeout-bound budget.
+  const exportResponsePromise = waitForGet(page, ENDPOINTS.DATASET_EXPORT, {
+    timeout: TIMEOUT.SLOW_TEST,
+  });
 
   // Click bulk export action
   await datasetListPage.clickBulkAction('Export');
@@ -312,8 +336,11 @@ test('should edit dataset name via modal', async ({
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
 
-  // Verify dataset is visible in list
-  await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created dataset appears.
+  await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Click edit action to open modal
   await datasetListPage.clickEditAction(datasetName);
@@ -348,7 +375,7 @@ test('should edit dataset name via modal', async ({
   // Modal should close
   await editModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible({ timeout: 10000 });
 
@@ -377,9 +404,14 @@ test('should bulk delete multiple datasets', async ({
   await datasetListPage.goto();
   await datasetListPage.waitForTableLoad();
 
-  // Verify both datasets are visible in list
-  await expect(datasetListPage.getDatasetRow(dataset1.name)).toBeVisible();
-  await expect(datasetListPage.getDatasetRow(dataset2.name)).toBeVisible();
+  // The list query is asynchronous; allow extra time on slow CI before the
+  // freshly-created datasets appear.
+  await expect(datasetListPage.getDatasetRow(dataset1.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
+  await expect(datasetListPage.getDatasetRow(dataset2.name)).toBeVisible({
+    timeout: TIMEOUT.API_RESPONSE,
+  });
 
   // Enable bulk select mode
   await datasetListPage.clickBulkSelectButton();
@@ -404,13 +436,13 @@ test('should bulk delete multiple datasets', async ({
   // Modal should close
   await deleteModal.waitForHidden();
 
-  // Verify success toast appears
+  // Verify success toast appears.
   const toast = new Toast(page);
   await expect(toast.getSuccess()).toBeVisible();
 
-  // Verify both datasets are removed from list
-  await expect(datasetListPage.getDatasetRow(dataset1.name)).not.toBeVisible();
-  await expect(datasetListPage.getDatasetRow(dataset2.name)).not.toBeVisible();
+  // Verify both datasets are removed from list (deleted rows leave the DOM)
+  await expect(datasetListPage.getDatasetRow(dataset1.name)).toHaveCount(0);
+  await expect(datasetListPage.getDatasetRow(dataset2.name)).toHaveCount(0);
 
   // Verify via API that datasets no longer exist (404)
   await expectDeleted(page, ENDPOINTS.DATASET, dataset1.id, {
@@ -455,10 +487,10 @@ test.describe('import dataset', () => {
       label: `Dataset ${datasetId}`,
     });
 
-    // Refresh to confirm dataset is no longer in the list
+    // Refresh to confirm dataset is no longer in the list (deleted rows leave the DOM)
     await datasetListPage.goto();
     await datasetListPage.waitForTableLoad();
-    await expect(datasetListPage.getDatasetRow(datasetName)).not.toBeVisible();
+    await expect(datasetListPage.getDatasetRow(datasetName)).toHaveCount(0);
 
     // Click the import button
     await datasetListPage.clickImportButton();
@@ -507,7 +539,7 @@ test.describe('import dataset', () => {
     // Modal should close on success
     await importModal.waitForHidden({ timeout: TIMEOUT.FILE_IMPORT });
 
-    // Verify success toast appears
+    // Verify success toast appears.
     const toast = new Toast(page);
     await expect(toast.getSuccess()).toBeVisible({ timeout: 10000 });
 
@@ -515,8 +547,11 @@ test.describe('import dataset', () => {
     await datasetListPage.goto();
     await datasetListPage.waitForTableLoad();
 
-    // Verify dataset appears in list
-    await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible();
+    // The list query is asynchronous; allow extra time on slow CI before the
+    // freshly-imported dataset appears.
+    await expect(datasetListPage.getDatasetRow(datasetName)).toBeVisible({
+      timeout: TIMEOUT.API_RESPONSE,
+    });
 
     // Track for cleanup: the dataset import API returns {"message": "OK"}
     // with no ID, so look up the reimported dataset by name.