diff --git a/test/test_merge_pic.py b/test/test_merge_pic.py
index 0f69ab0..676ba66 100644
--- a/test/test_merge_pic.py
+++ b/test/test_merge_pic.py
@@ -22,3 +22,9 @@ async def test_9_merge():
     post = plugin_module.post.Post('', '', '', pics=merge_source_9)
     await post._pic_merge() 
     assert len(post.pics) == 5
+
+@pytest.mark.asyncio
+async def test_6_merge():
+    post = plugin_module.post.Post('', '', '', pics=merge_source_9[0:6]+merge_source_9[9:])
+    await post._pic_merge() 
+    assert len(post.pics) == 5