diff --git a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
index 0def198d..7cd07dc3 100644
--- a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
+++ b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
@@ -2,17 +2,19 @@ import type { ReactNode } from "react";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { act, renderHook, waitFor } from "@testing-library/react";
 import { beforeEach, describe, expect, it, vi } from "vitest";
-import type { WorkOrderDetail, WorkOrderFormValues } from "@/domain/work-orders/types/work-order";
+import type { WorkOrderDetail } from "@/domain/work-orders/types/work-order";
 import type { WorkOrderTableRow } from "@/domain/work-orders/types/work-order-table-row";
 
 const getById = vi.fn();
 const update = vi.fn();
+const updateCompletedDate = vi.fn();
 const patchBoardField = vi.fn();
 
 vi.mock("@/domain/work-orders/api/work-orders-api", () => ({
   workOrdersApi: {
     getById: (...args: unknown[]) => getById(...args),
     update: (...args: unknown[]) => update(...args),
+    updateCompletedDate: (...args: unknown[]) => updateCompletedDate(...args),
     patchBoardField: (...args: unknown[]) => patchBoardField(...args),
   },
 }));
@@ -117,6 +119,7 @@ describe("useWorkOrderTableMutations completion-doc persistence", () => {
   beforeEach(() => {
     getById.mockReset();
     update.mockReset();
+    updateCompletedDate.mockReset();
     patchBoardField.mockReset();
     serverState = { ...BASE_DETAIL };
     rowState = { ...BASE_ROW };
@@ -144,24 +147,11 @@ describe("useWorkOrderTableMutations completion-doc persistence", () => {
       },
     );
 
-    getById.mockImplementation(async () => {
-      events.push("getById:start");
-      await delay(15);
-      events.push("getById:end");
-      return { ...serverState };
-    });
-
-    update.mockImplementation(async (_id: unknown, values: WorkOrderFormValues) => {
-      events.push("update:start");
+    updateCompletedDate.mockImplementation(async (_id: unknown, completedDate: string) => {
+      events.push("updateCompletedDate:start");
       await delay(5);
-      serverState = {
-        ...serverState,
-        scheduledDate: values.scheduledDate,
-        completedDate: values.completedDate,
-        status: values.status,
-      };
-      events.push("update:end");
-      return { ...serverState };
+      serverState = { ...serverState, completedDate };
+      events.push("updateCompletedDate:end");
     });
   });
 
@@ -189,10 +179,12 @@ describe("useWorkOrderTableMutations completion-doc persistence", () => {
       workOrderVersion: "AAAAAAA=",
     });
     expect(update).not.toHaveBeenCalled();
+    expect(updateCompletedDate).not.toHaveBeenCalled();
+    expect(getById).not.toHaveBeenCalled();
     expect(serverState.docStatus).toBe("NN");
   });
 
-  it("serializes board docStatus and completedDate full-update without racing", async () => {
+  it("serializes board docStatus and completedDate without racing or GetWorkorderById", async () => {
     const onPatch = vi.fn();
     const { result } = renderHook(
       () =>
@@ -209,27 +201,23 @@ describe("useWorkOrderTableMutations completion-doc persistence", () => {
       result.current.patchField(42, { completedDate: "2026-07-20" });
     });
 
-    await waitFor(() => expect(events).toContain("update:end"));
+    await waitFor(() => expect(events).toContain("updateCompletedDate:end"));
     await waitFor(() => expect(events).toContain("boardPatch:end"));
 
     expect(events).toEqual([
       "boardPatch:start",
       "boardPatch:end",
-      "getById:start",
-      "getById:end",
-      "update:start",
-      "update:end",
+      "updateCompletedDate:start",
+      "updateCompletedDate:end",
     ]);
 
+    expect(getById).not.toHaveBeenCalled();
+    expect(update).not.toHaveBeenCalled();
+    expect(updateCompletedDate).toHaveBeenCalledWith(42, "2026-07-20");
+
     expect(serverState.docStatus).toBe("Yes");
     expect(serverState.completedDate).toBe("2026-07-20");
     expect(serverState.scheduledDate).toBe(BASE_DETAIL.scheduledDate);
     expect(serverState.status).toBe(BASE_DETAIL.status);
-
-    for (const call of update.mock.calls) {
-      const values = call[1] as WorkOrderFormValues;
-      expect(values.scheduledDate).toBe(BASE_DETAIL.scheduledDate);
-      expect(values.status).not.toBe("Done");
-    }
   });
 });