diff --git a/vitest.workspace.js b/vitest.workspace.js
new file mode 100644
index 000000000..bb9e47754
--- /dev/null
+++ b/vitest.workspace.js
@@ -0,0 +1,6 @@
+import { defineWorkspace } from 'vitest/config'
+
+export default defineWorkspace([
+  "./vite.config.ts",
+  "./packages/mermaid/src/docs/vite.config.ts"
+])