diff --git a/apps/api/src/__tests__/petsExtendedFields.test.ts b/apps/api/src/__tests__/petsExtendedFields.test.ts
index a013d88..6c19818 100644
--- a/apps/api/src/__tests__/petsExtendedFields.test.ts
+++ b/apps/api/src/__tests__/petsExtendedFields.test.ts
@@ -21,8 +21,8 @@ const MANAGER: StaffRow = {
 
 // ─── Mutable mock state ───────────────────────────────────────────────────────
 
-const CLIENT_ID = "client-uuid-extended";
-const PET_ID = "pet-uuid-extended";
+const CLIENT_ID = "a0000000-0000-4000-8000-000000000001";
+const PET_ID = "b0000000-0000-4000-8000-000000000002";
 
 let petRows: Record<string, unknown>[] = [];
 let appointmentRows: Record<string, unknown>[] = [];
@@ -163,10 +163,10 @@ vi.mock("../db", () => {
     }),
     pets,
     appointments,
-    and,
-    eq,
-    exists,
-    or,
+    and: (...conds: unknown[]) => conds,
+    eq: (col: unknown, val: unknown) => ({ col, val }),
+    exists: (q: unknown) => q,
+    or: (...conds: unknown[]) => conds,
   };
 });