diff --git a/package-lock.json b/package-lock.json
index 34d396c9..f21d2afc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "omniroute",
-  "version": "2.3.3",
+  "version": "2.3.12",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "omniroute",
-      "version": "2.3.3",
+      "version": "2.3.12",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [
diff --git a/src/shared/validation/schemas.ts b/src/shared/validation/schemas.ts
index ae54f7f5..785989a2 100644
--- a/src/shared/validation/schemas.ts
+++ b/src/shared/validation/schemas.ts
@@ -785,10 +785,13 @@ export const updateProviderConnectionSchema = z
 export const providersBatchTestSchema = z
   .object({
     mode: z.enum(["provider", "oauth", "free", "apikey", "compatible", "all"]),
-    providerId: z.string().trim().min(1).optional(),
+    // Frontend may send null when mode != 'provider' — accept and treat as missing
+    providerId: z.string().trim().min(1).nullable().optional(),
   })
   .superRefine((value, ctx) => {
-    if (value.mode === "provider" && !value.providerId) {
+    // Treat null same as undefined
+    const pid = value.providerId ?? null;
+    if (value.mode === "provider" && !pid) {
       ctx.addIssue({
         code: z.ZodIssueCode.custom,
         message: "providerId is required when mode=provider",