diff --git a/karma.config.d/extra.karma.conf.js b/karma.config.d/extra.karma.conf.js
new file mode 100644
index 0000000..0fb9f72
--- /dev/null
+++ b/karma.config.d/extra.karma.conf.js
@@ -0,0 +1,16 @@
+const basePath = config.basePath.replace(/\/node_modules$/, "")
+config.set({
+    "basePath": basePath,
+    "files": [
+        ...config.files,
+        {pattern: 'kotlin/**/*', included: false}
+    ],
+    "proxies": {
+      '/': '/base/kotlin/'
+    },
+    client: {
+        mocha: {
+            timeout: 20000
+        }
+    }
+})