diff --git a/package.json b/package.json
index 56a01470..2629ad09 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,6 @@
 {
   "name": "nuxeo-extension",
+   "type": "module",
   "private": true,
   "engines": {
     "node": ">=10.12.0"
@@ -61,7 +62,7 @@
     "build": "gulp clean build",
     "gulp": "gulp",
     "watch": "gulp watch",
-    "test": "./node_modules/.bin/wdio wdio.conf.js"
+    "test": "./node_modules/.bin/wdio wdio.conf.cjs"
   },
   "dependencies": {
     "chai": "^4.2.0",
diff --git a/test/features/step_definitions/about.js b/test/features/step_definitions/about.cjs
similarity index 100%
rename from test/features/step_definitions/about.js
rename to test/features/step_definitions/about.cjs
diff --git a/test/features/step_definitions/designer-live-preview.js b/test/features/step_definitions/designer-live-preview.cjs
similarity index 100%
rename from test/features/step_definitions/designer-live-preview.js
rename to test/features/step_definitions/designer-live-preview.cjs
diff --git a/test/features/step_definitions/display.js b/test/features/step_definitions/display.cjs
similarity index 100%
rename from test/features/step_definitions/display.js
rename to test/features/step_definitions/display.cjs
diff --git a/test/features/step_definitions/navigation.js b/test/features/step_definitions/navigation.cjs
similarity index 100%
rename from test/features/step_definitions/navigation.js
rename to test/features/step_definitions/navigation.cjs
diff --git a/test/features/step_definitions/platform.js b/test/features/step_definitions/platform.cjs
similarity index 100%
rename from test/features/step_definitions/platform.js
rename to test/features/step_definitions/platform.cjs
diff --git a/test/features/step_definitions/restart.js b/test/features/step_definitions/restart.cjs
similarity index 100%
rename from test/features/step_definitions/restart.js
rename to test/features/step_definitions/restart.cjs
diff --git a/test/features/step_definitions/search.js b/test/features/step_definitions/search.cjs
similarity index 100%
rename from test/features/step_definitions/search.js
rename to test/features/step_definitions/search.cjs
diff --git a/test/features/step_definitions/studio.js b/test/features/step_definitions/studio.cjs
similarity index 100%
rename from test/features/step_definitions/studio.js
rename to test/features/step_definitions/studio.cjs
diff --git a/test/features/step_definitions/support/client.js b/test/features/step_definitions/support/client.cjs
similarity index 100%
rename from test/features/step_definitions/support/client.js
rename to test/features/step_definitions/support/client.cjs
diff --git a/test/features/step_definitions/support/fixtures/auth.js b/test/features/step_definitions/support/fixtures/auth.cjs
similarity index 100%
rename from test/features/step_definitions/support/fixtures/auth.js
rename to test/features/step_definitions/support/fixtures/auth.cjs
diff --git a/test/features/step_definitions/support/fixtures/documents.js b/test/features/step_definitions/support/fixtures/documents.cjs
similarity index 100%
rename from test/features/step_definitions/support/fixtures/documents.js
rename to test/features/step_definitions/support/fixtures/documents.cjs
diff --git a/test/features/step_definitions/support/fixtures/mocks.js b/test/features/step_definitions/support/fixtures/mocks.cjs
similarity index 100%
rename from test/features/step_definitions/support/fixtures/mocks.js
rename to test/features/step_definitions/support/fixtures/mocks.cjs
diff --git a/test/features/step_definitions/support/fixtures/nav.js b/test/features/step_definitions/support/fixtures/nav.cjs
similarity index 100%
rename from test/features/step_definitions/support/fixtures/nav.js
rename to test/features/step_definitions/support/fixtures/nav.cjs
diff --git a/test/features/step_definitions/support/hooks.js b/test/features/step_definitions/support/hooks.cjs
similarity index 100%
rename from test/features/step_definitions/support/hooks.js
rename to test/features/step_definitions/support/hooks.cjs
diff --git a/test/features/step_definitions/toggles.js b/test/features/step_definitions/toggles.cjs
similarity index 100%
rename from test/features/step_definitions/toggles.js
rename to test/features/step_definitions/toggles.cjs
diff --git a/test/injecter.js b/test/injecter.cjs
similarity index 100%
rename from test/injecter.js
rename to test/injecter.cjs
diff --git a/wdio.conf.js b/wdio.conf.cjs
similarity index 98%
rename from wdio.conf.js
rename to wdio.conf.cjs
index c7618b4f..468be9de 100644
--- a/wdio.conf.js
+++ b/wdio.conf.cjs
@@ -1,4 +1,4 @@
-const nuxeo = require('./test/features/step_definitions/support/client.js').nuxeo;
+const nuxeo = require('./test/features/step_definitions/support/client.cjs').nuxeo;
 const path = require('path');
 
 exports.config = {
@@ -167,7 +167,7 @@ exports.config = {
  //
     // If you are using Cucumber you need to specify the location of your step definitions.
     cucumberOpts: {
-        require: ['./test/features/step_definitions/*.js'],        // <string[]> (file/dir) require files before executing features
+        require: ['./test/features/step_definitions/*.cjs'],        // <string[]> (file/dir) require files before executing features
         backtrace: true,   // <boolean> show full backtrace for errors
         compiler: [],       // <string[]> ("extension:module") require files with the given EXTENSION after requiring MODULE (repeatable)
         dryRun: false,      // <boolean> invoke formatters without executing steps