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 0e3da90..bb32de1 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
@@ -401,4 +401,29 @@ public class OpsOrderServiceTest {
         verify(orderLifecycleManager, never()).cancelOrder(anyLong(), anyLong(), any(OperatorTypeEnum.class), anyString());
     }
 
+    @Test
+    void testAssignOrder_FromQueuedStatus_Success() {
+        // Given
+        testOrder.setStatus(WorkOrderStatusEnum.QUEUED.getStatus());
+        OpsOrderAssignReqDTO assignReq = new OpsOrderAssignReqDTO();
+        assignReq.setOrderId(1L);
+        assignReq.setAssigneeId(2001L);
+        assignReq.setRemark("从队列分配");
+
+        when(opsOrderMapper.selectById(1L)).thenReturn(testOrder);
+
+        // When
+        assertDoesNotThrow(() -> opsOrderService.assignOrder(assignReq, OperatorTypeEnum.ADMIN, 1002L));
+
+        // Then
+        verify(orderStateMachine, times(1)).transition(
+            eq(testOrder),
+            eq(WorkOrderStatusEnum.DISPATCHED),
+            eq(OperatorTypeEnum.ADMIN),
+            eq(1002L),
+            eq("从队列分配")
+        );
+        assertEquals(2001L, testOrder.getAssigneeId());
+    }
+
 }