Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

WebdriverIO Version

9.21.0

Node.js Version

• Node: 22.x (also seen in GH Actions Ubuntu 22.04 runner)

Mode

WDIO Testrunner

Which capabilities are you using?

{
  browserName: 'chrome'
  browserVersion: 'latest'
  platformName: 'Windows 10'
  'wdio:maxInstances': 10
  'wdio:enforceWebDriverClassic': true
}

What happened?

SauceService.beforeTest attempts to set _suiteTitle using:

if (this._suiteTitle === 'Jasmine__TopLevel__Suite') {
  this._suiteTitle = test.fullName.slice(
    0,
    test.fullName.indexOf(test.description || '') - 1
  )
}

On Jasmine runs the framework hook receives a test object without fullName (and sometimes without description). The call to slice throws, the error is logged by @wdio/utils (shim), and execution continues. The job still passes, but the logs are flooded with the error on every beforeTest.

Example log line (repeats for every spec):

ERROR @wdio/utils:shim: TypeError: Cannot read properties of undefined (reading 'slice')
    at SauceService.beforeTest (.../node_modules/@wdio/sauce-service/build/index.js:257:40)

What is your expected behavior?

• Sauce service should handle missing fullName / description gracefully (either skip deriving the name or use a fallback) and avoid throwing.

Impact

• CI logs are flooded with hundreds of identical TypeErrors on passing suites, obscuring real issues.
• The service still works (job names / annotations may be missing), but logging noise is significant.

How to reproduce the bug.

Minimal reproduction steps

1. npm init wdio@latest (or use an existing v9.21.0 project) with framework: jasmine and enable @wdio/sauce-service.
2. Add a trivial Jasmine spec:

   describe('sample', () => {
     it('runs', () => { expect(true).toBeTrue(); });
   });

3. Run via Sauce (e.g., wdio wdio.sauce.conf.ts -f jasmine --spec ./path/to/spec.ts) with valid Sauce creds.
4. Observe worker logs: every spec logs TypeError: Cannot read properties of undefined (reading 'slice') from @wdio/utils:shim pointing to SauceService.beforeTest.

Relevant log output

Sanitized log below

2026-01-09T15:52:56.0782062Z [0-8] RUNNING in chrome(latest) on Windows 10 - file:///path/to/spec.ts
2026-01-09T15:52:56.2600204Z [0-7] RUNNING in chrome(latest) on Windows 10 - file:///path/to/spec.ts
...
2026-01-09T15:53:02.5111831Z [0-7] 2026-01-09T15:53:02.509Z ERROR @wdio/utils:shim: TypeError: Cannot read properties of undefined (reading 'slice')
[0-7]     at SauceService.beforeTest (file:///path/to/project/node_modules/@wdio/sauce-service/build/index.js:257:40)
[0-7]     at <anonymous> (/path/to/project/node_modules/@wdio/utils/build/index.js:945:22)
[0-7] Error in "BeforeTest Hook"
[0-7]     at new Promise (<anonymous>)
Cannot read properties of undefined (reading 'slice')
[0-7]     at <anonymous> (/path/to/project/node_modules/@wdio/utils/build/index.js:942:45)
[0-7]     at Array.map (<anonymous>)
[0-7]     at executeHooksWithArgs (/path/to/project/node_modules/@wdio/utils/build/index.js:942:31)
[0-7]     at UserContext.testFrameworkFnWrapper (/path/to/project/node_modules/@wdio/utils/build/index.js:1171:45)
[0-7]     at UserContext.testFnWrapper (/path/to/project/node_modules/@wdio/utils/build/index.js:1163:33)
[0-7]     at UserContext.wrappedFn (/path/to/project/node_modules/@wdio/utils/build/index.js:1250:26)
[0-7]     at QueueRunner.attempt (/path/to/project/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:8545:40)

Code of Conduct

• I agree to follow this project's Code of Conduct

Is there an existing issue for this?

• I have searched the existing issues