diff --git a/src/app/api/auth/me/doctor-report-prefs/__tests__/route.test.ts b/src/app/api/auth/me/doctor-report-prefs/__tests__/route.test.ts
index 13e2159ab..10b0aea2d 100644
--- a/src/app/api/auth/me/doctor-report-prefs/__tests__/route.test.ts
+++ b/src/app/api/auth/me/doctor-report-prefs/__tests__/route.test.ts
@@ -7,6 +7,7 @@ vi.mock("@/lib/db", () => ({
       update: vi.fn(),
     },
   },
+  toJson: <T,>(v: T) => v,
 }));
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));
diff --git a/src/app/api/integrations/healthkit/__tests__/route.test.ts b/src/app/api/integrations/healthkit/__tests__/route.test.ts
index 41d4c980a..f31ecf4bb 100644
--- a/src/app/api/integrations/healthkit/__tests__/route.test.ts
+++ b/src/app/api/integrations/healthkit/__tests__/route.test.ts
@@ -5,6 +5,7 @@ vi.mock("@/lib/db", () => ({
   prisma: {
     user: { findUnique: vi.fn(), update: vi.fn() },
   },
+  toJson: <T,>(v: T) => v,
 }));
 
 vi.mock("@/lib/auth/session", () => ({ getSession: vi.fn() }));