diff --git a/viewsh-module-ops/viewsh-module-ops-biz/src/test/java/com/viewsh/module/ops/service/order/OpsOrderServiceTest.java b/viewsh-module-ops/viewsh-module-ops-biz/src/test/java/com/viewsh/module/ops/service/order/OpsOrderServiceTest.java
index 9a9a999..0e3da90 100644
--- a/viewsh-module-ops/viewsh-module-ops-biz/src/test/java/com/viewsh/module/ops/service/order/OpsOrderServiceTest.java
+++ b/viewsh-module-ops/viewsh-module-ops-biz/src/test/java/com/viewsh/module/ops/service/order/OpsOrderServiceTest.java
@@ -84,9 +84,34 @@ public class OpsOrderServiceTest {
             // 模拟 MyBatis Plus 的 ID 自动回填
             if (order.getId() == null) {
                 order.setId(1L);
-            }
+    @Test
+    void testAssignOrder_FromQueuedStatus_Success() {
+        // Given
+        testOrder.setStatus(WorkOrderStatusEnum.QUEUED.getStatus());
+        OpsOrderAssignReqDTO assignReq = new OpsOrderAssignReqDTO();
+        assignReq.setOrderId(1L);
+        assignReq.setAssigneeId(2001L);
+        assignReq.setRemark("排队后分配");
+
+        when(opsOrderMapper.selectById(1L)).thenReturn(testOrder);
+
+        // When
+        assertDoesNotThrow(() -> opsOrderService.assignOrder(assignReq, OperatorTypeEnum.SYSTEM, null));
+
+        // Then
+        verify(orderStateMachine, times(1)).transition(
+            eq(testOrder),
+            eq(WorkOrderStatusEnum.DISPATCHED),
+            eq(OperatorTypeEnum.SYSTEM),
+            eq(null),
+            eq("排队后分配")
+        );
+        assertEquals(2001L, testOrder.getAssigneeId());
+    }
+}
             return 1;
         });
+
         lenient().doAnswer(invocation -> {
             OpsOrderDO order = invocation.getArgument(0);
             order.setStatus(WorkOrderStatusEnum.PENDING.getStatus());