diff --git a/packages/transcription/README.md b/packages/transcription/README.md
index 9180cecc1..3006070b6 100644
--- a/packages/transcription/README.md
+++ b/packages/transcription/README.md
@@ -19,3 +19,8 @@ const deepLearningFrameworks: DeepLearningFramework = [
   }
 ]
 ```
+
+
+What about the lifecycle of each transcriber ?
+- install => installer
+- update => udpater
diff --git a/packages/transcription/src/duration.spec.ts b/packages/transcription/src/duration.spec.ts
index f4131f31a..28888d040 100755
--- a/packages/transcription/src/duration.spec.ts
+++ b/packages/transcription/src/duration.spec.ts
@@ -1,22 +1,23 @@
-import { toHumanReadable, toTimecode } from './duration';
+import { expect } from 'chai'
+import { toHumanReadable, toTimecode } from './duration.js'
 
-describe('duration', () => {
-  test('toHumanReadable', async () => {
-    const ONE_MINUTE = 60000;
-    let humanDuration = toHumanReadable(ONE_MINUTE);
-    expect(humanDuration).toEqual('1m');
+describe('duration conversion functions', () => {
+  it('toHumanReadable', () => {
+    const ONE_MINUTE = 60000
+    let humanDuration = toHumanReadable(ONE_MINUTE)
+    expect(humanDuration).to.equal('1m')
 
-    humanDuration = toHumanReadable(ONE_MINUTE * 60 + ONE_MINUTE);
-    expect(humanDuration).toEqual('1h 1m');
-  });
+    humanDuration = toHumanReadable(ONE_MINUTE * 60 + ONE_MINUTE)
+    expect(humanDuration).to.equal('1h 1m')
+  })
 
-  test('toTimecode', async () => {
-    const MORE_OR_LESS_ONE_MINUTE = '60.41545';
-    let timecode = toTimecode(MORE_OR_LESS_ONE_MINUTE);
-    expect(timecode).toEqual('00:01:00');
+  it('toTimecode', () => {
+    const MORE_OR_LESS_ONE_MINUTE = '60.41545'
+    let timecode = toTimecode(MORE_OR_LESS_ONE_MINUTE)
+    expect(timecode).to.equal('00:01:00')
 
-    const ONE_HOUR = '3600';
-    timecode = toTimecode(ONE_HOUR);
-    expect(timecode).toEqual('01:00:00');
-  });
-});
+    const ONE_HOUR = '3600'
+    timecode = toTimecode(ONE_HOUR)
+    expect(timecode).to.equal('01:00:00')
+  })
+})
diff --git a/packages/transcription/src/installer.ts b/packages/transcription/src/installer.ts
deleted file mode 100644
index e69de29bb..000000000
diff --git a/packages/transcription/src/update.ts b/packages/transcription/src/update.ts
deleted file mode 100644
index e69de29bb..000000000