diff --git a/src/config/config.gateway-tailscale-bind.test.ts b/src/config/config.gateway-tailscale-bind.test.ts
index bffe4e996ea..852c9b82693 100644
--- a/src/config/config.gateway-tailscale-bind.test.ts
+++ b/src/config/config.gateway-tailscale-bind.test.ts
@@ -54,14 +54,13 @@ describe("gateway tailscale bind validation", () => {
     });
     expect(lanRes.ok).toBe(false);
     if (!lanRes.ok) {
-      expect(lanRes.issues).toEqual(
-        expect.arrayContaining([
-          expect.objectContaining({
-            path: "gateway.bind",
-            message: expect.stringContaining("gateway.bind must resolve to loopback"),
-          }),
-        ]),
-      );
+      expect(lanRes.issues).toEqual([
+        {
+          path: "gateway.bind",
+          message:
+            'gateway.bind must resolve to loopback when gateway.tailscale.mode=serve (use gateway.bind="loopback" or gateway.bind="custom" with gateway.customBindHost="127.0.0.1")',
+        },
+      ]);
     }
 
     const customRes = validateConfigObject({