chore(internal): minor refactor of tests (#884)

Author: stainless-bot

tests/api-resources/audio/speech.test.ts

@@ -12,7 +12,7 @@ describe('resource speech', () => {
   test.skip('create: required and optional params', async () => {
     const response = await openai.audio.speech.create({
       input: 'string',
-      model: 'tts-1',
+      model: 'string',
       voice: 'alloy',
       response_format: 'mp3',
       speed: 0.25,

tests/api-resources/completions.test.ts

@@ -10,10 +10,7 @@ const openai = new OpenAI({
 
 describe('resource completions', () => {
   test('create: only required params', async () => {
-    const responsePromise = openai.completions.create({
-      model: 'gpt-3.5-turbo-instruct',
-      prompt: 'This is a test.',
-    });
+    const responsePromise = openai.completions.create({ model: 'string', prompt: 'This is a test.' });
     const rawResponse = await responsePromise.asResponse();
     expect(rawResponse).toBeInstanceOf(Response);
     const response = await responsePromise;
@@ -25,7 +22,7 @@ describe('resource completions', () => {
 
   test('create: required and optional params', async () => {
     const response = await openai.completions.create({
-      model: 'gpt-3.5-turbo-instruct',
+      model: 'string',
       prompt: 'This is a test.',
       best_of: 0,
       echo: true,