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 73729279..6b2b3a64 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
@@ -25,6 +25,11 @@ import {
   applySchedulePatch,
   useWorkOrderTableMutations,
 } from "@/domain/work-orders/use-cases/use-work-order-table-mutations";
+import { toVendorTablePatch } from "@/domain/work-orders/utils/vendor-assignment-patch";
+import {
+  getClosabilityGaps,
+  tableRowToClosabilityInput,
+} from "@/domain/work-orders/utils/wo-closability";
 
 function delay(ms: number): Promise<void> {
   return new Promise((resolve) => setTimeout(resolve, ms));
@@ -345,3 +350,116 @@ describe("useWorkOrderTableMutations schedule isAddOn from BE", () => {
     );
   });
 });
+
+describe("useWorkOrderTableMutations vendor assignment round-trip", () => {
+  let rowState: WorkOrderTableRow;
+
+  beforeEach(() => {
+    getById.mockReset();
+    update.mockReset();
+    patchBoardField.mockReset();
+    rowState = {
+      ...BASE_ROW,
+      vendorId: "1",
+      company: "",
+      tech: "",
+      completedDate: "2026-07-15",
+      docStatus: "Yes",
+      mediaCount: 1,
+      woNumber: "20260623001",
+      primaryDispatchStatus: "Refused",
+      primaryDispatchId: 10,
+      dispatchRowVersion: "disp-v1",
+    };
+  });
+
+  it("keeps Company off the gap list when vendor PATCH returns a Pending assignment", async () => {
+    const returnedRow: WorkOrderTableRow = {
+      ...rowState,
+      vendorId: "9",
+      company: "New Co",
+      primaryDispatchStatus: "Pending",
+      primaryDispatchId: 11,
+    };
+    patchBoardField.mockResolvedValue(returnedRow);
+
+    const onPatch = vi.fn();
+    const { result } = renderHook(
+      () =>
+        useWorkOrderTableMutations({
+          onPatch,
+          clearPatch: () => undefined,
+          getRow: () => rowState,
+        }),
+      { wrapper: makeWrapper() },
+    );
+
+    act(() => {
+      result.current.patchField(
+        42,
+        toVendorTablePatch({
+          vendorId: "9",
+          company: "New Co",
+          tech: "",
+          techPhone: "",
+        }),
+      );
+    });
+
+    await waitFor(() =>
+      expect(onPatch).toHaveBeenCalledWith(
+        42,
+        expect.objectContaining({ primaryDispatchStatus: "Pending" }),
+      ),
+    );
+
+    expect(patchBoardField).toHaveBeenCalledWith(
+      42,
+      expect.objectContaining({ field: "vendorId", value: "9" }),
+    );
+    const payload = patchBoardField.mock.calls[0]?.[1] as Record<string, unknown>;
+    expect(payload).not.toHaveProperty("primaryDispatchStatus");
+    expect(getClosabilityGaps(tableRowToClosabilityInput(returnedRow))).not.toContain("Company");
+  });
+
+  it("keeps a Company gap when vendor PATCH still returns Refused", async () => {
+    const returnedRow: WorkOrderTableRow = {
+      ...rowState,
+      vendorId: "9",
+      company: "New Co",
+      primaryDispatchStatus: "Refused",
+    };
+    patchBoardField.mockResolvedValue(returnedRow);
+
+    const onPatch = vi.fn();
+    const { result } = renderHook(
+      () =>
+        useWorkOrderTableMutations({
+          onPatch,
+          clearPatch: () => undefined,
+          getRow: () => rowState,
+        }),
+      { wrapper: makeWrapper() },
+    );
+
+    act(() => {
+      result.current.patchField(
+        42,
+        toVendorTablePatch({
+          vendorId: "9",
+          company: "New Co",
+          tech: "",
+          techPhone: "",
+        }),
+      );
+    });
+
+    await waitFor(() =>
+      expect(onPatch).toHaveBeenCalledWith(
+        42,
+        expect.objectContaining({ primaryDispatchStatus: "Refused" }),
+      ),
+    );
+    expect(getClosabilityGaps(tableRowToClosabilityInput(returnedRow))).toContain("Company");
+  });
+});