1) tests/cell_toolbar.spec.ts:3:5 › should add buttons on code cell and markdown cell ──────────── Error: Timed out 5000ms waiting for expect(locator).toBeVisible() Locator: locator('.jp-cell-toolbar button[data-command="toolbar-button:run-code-cell"]') Expected: visible Received: <element(s) not found> Call log: - expect.toBeVisible with timeout 5000ms - waiting for locator('.jp-cell-toolbar button[data-command="toolbar-button:run-code-cell"]') 14 | 15 | await page.notebook.setCell(0, 'code', 'print("Hello, JupyterLab")'); > 16 | await expect(page.locator(RUN_CODE)).toBeVisible(); | ^ 17 | await expect(page.locator(RENDER_MD)).toBeHidden(); 18 | 19 | await page.locator(RUN_CODE).click(); at /home/runner/work/extension-examples/extension-examples/cell-toolbar/ui-tests/tests/cell_toolbar.spec.ts:16:40

Process completed with exit code 1.