flake: create workspace and overwrite default parameters

[flake-investigator]

CI Run: https://github.com/coder/coder/actions/runs/23307509845
Commit: 0176a5dd6bd1702ae929bfbf8e7ad11c87232872 (Danielle Maywood)
Job: test-e2e

Failure summary:

• Playwright test failed: [tests] › e2e/tests/workspaces/createWorkspace.spec.ts:112:5 › create workspace and overwrite default parameters
• Parameter verification mismatch for a boolean value; expected override value "false" but UI reported "true".

Error excerpt:

1) [tests] › e2e/tests/workspaces/createWorkspace.spec.ts:112:5 › create workspace and overwrite default parameters

Error: expect(received).toEqual(expected) // deep equality

Expected: "false"
Received: "true"

at helpers.ts:215
  213 |       const parameterField = parameterLabel.locator("input");
  214 |       const value = await parameterField.isChecked();
> 215 |       expect(value.toString()).toEqual(buildParameter.value);
      |                                ^
  216 |     }

Timing verification:

• Job completed at 2026-03-19T17:26:38Z, within minutes of the Slack alert.

Root cause assessment:

• Likely flaky UI/parameter hydration for boolean parameters. The test sets the boolean parameter to "false" when creating the workspace, but verifyParameters reads the checkbox as checked (true). Unlike string/number paths, the bool path uses isChecked() without retry; it can capture a stale default value before data hydration completes.

Assignment analysis:

• git blame -L 205,218 site/e2e/helpers.ts → commit b73f216 ("flake: verify parameters in parallel in e2e tests") by @jeremyruppel, which touched the verifyParameters logic and is closest to the failing line.
• git log --oneline -10 --follow site/e2e/tests/workspaces/createWorkspace.spec.ts shows no recent targeted changes to this test, suggesting the issue is in shared verification logic rather than the test itself.

Related issues:

• flake: e2e create workspace with default and required parameters #1154 (parameter verification flake with empty values)
• flake: update workspace, new required, mutable parameter added #1328 (parameter verification flake after update)

Reproduction:

• pnpm playwright:test --forbid-only --workers 1 --grep "create workspace and overwrite default parameters"