diff --git a/tests/test_render_2_0.py b/tests/test_render_2_0.py
index f9f82928..74f57c1f 100644
--- a/tests/test_render_2_0.py
+++ b/tests/test_render_2_0.py
@@ -2454,6 +2454,7 @@ def test_bug_3831_documents(user3: UserClientFlask):
     assert 'Delete Lot' in body
     assert 'Incoming Lot' in body
 
+    lot_id = Lot.query.all()[1].id
     uri = f'/inventory/lot/{lot_id}/trade-document/add/'
     body, status = user3.get(uri)
 
@@ -2471,8 +2472,16 @@ def test_bug_3831_documents(user3: UserClientFlask):
     }
 
     uri = f'/inventory/lot/{lot_id}/trade-document/add/'
-    # body, status = user3.post(uri, data=data, content_type="multipart/form-data")
-    # assert status == '200 OK'
+    body, status = user3.post(uri, data=data, content_type="multipart/form-data")
+    assert status == '200 OK'
+
+    # Second document
+    uri = f'/inventory/lot/{lot_id}/trade-document/add/'
+    file_upload = (BytesIO(b_file), file_name)
+    data['file'] = file_upload
+    data['csrf_token'] = generate_csrf()
+    body, status = user3.post(uri, data=data, content_type="multipart/form-data")
+    assert status == '200 OK'
 
 
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