diff --git a/packages/tests/src/transcription/whisper/transcriber/whisper-ctranslate2.spec.ts b/packages/tests/src/transcription/whisper/transcriber/whisper-ctranslate2.spec.ts
index e258378bc79..6ee072a2a70 100644
--- a/packages/tests/src/transcription/whisper/transcriber/whisper-ctranslate2.spec.ts
+++ b/packages/tests/src/transcription/whisper/transcriber/whisper-ctranslate2.spec.ts
@@ -104,7 +104,6 @@ describe('Whisper CTranslate2 transcriber', function () {
     this.timeout(5 * 1000 * 60)
     const transcribeArgs: WhisperTranscribeArgs = {
       mediaFilePath: frVideoPath,
-      model: await TranscriptionModel.fromPath(buildAbsoluteFixturePath('transcription/models/tiny.pt')),
       language: 'fr',
       format: 'txt'
     }
diff --git a/packages/transcription/src/whisper/transcriber/ctranslate2-transcriber.ts b/packages/transcription/src/whisper/transcriber/ctranslate2-transcriber.ts
index d6b858354c7..29801a0d3a6 100644
--- a/packages/transcription/src/whisper/transcriber/ctranslate2-transcriber.ts
+++ b/packages/transcription/src/whisper/transcriber/ctranslate2-transcriber.ts
@@ -4,6 +4,7 @@ import { lstat } from 'node:fs/promises'
 import { OpenaiTranscriber, WhisperTranscribeArgs } from './openai-transcriber.js'
 import { TranscriptFile } from '../../transcript/index.js'
 import { WhisperBuiltinModel } from '../whisper-builtin-model.js'
+import assert from 'node:assert'
 
 export class Ctranslate2Transcriber extends OpenaiTranscriber {
   async transcribe ({
@@ -20,7 +21,7 @@ export class Ctranslate2Transcriber extends OpenaiTranscriber {
     const $$ = $({ verbose: true })
 
     if (model.path) {
-      await lstat(model.path).then(stats => stats.isDirectory())
+      assert(await lstat(model.path).then(stats => stats.isDirectory()), 'Model path must be a path to a directory.')
     }
 
     const modelArgs = model.path ? [ '--model_directory', model.path ] : [ '--model', model.name ]