Issue with Empty Text in Dad Jokes Example Test

// Before this all from the Dad's joke example unchanged
const program = LanguageModel.generateText({
    prompt: 'Generate a dad joke about pirates',
    toolkit: DadJokeTools,
}).pipe(Effect.provide(OpenAiLanguageModel.model('gpt-4o')))

it.effect('tool should get pirates', () =>
  E.gen(function* () {
    const result = yield* program
    console.log(JSON.stringify(result, null, 2))

    expect(result.text).toContain('pirates')
  }).pipe(Effect.provide([OpenAi, DadJokeToolHandlers])),

// Before this all from the Dad's joke example unchanged
const program = LanguageModel.generateText({
    prompt: 'Generate a dad joke about pirates',
    toolkit: DadJokeTools,
}).pipe(Effect.provide(OpenAiLanguageModel.model('gpt-4o')))

it.effect('tool should get pirates', () =>
  E.gen(function* () {
    const result = yield* program
    console.log(JSON.stringify(result, null, 2))

    expect(result.text).toContain('pirates')
  }).pipe(Effect.provide([OpenAi, DadJokeToolHandlers])),