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-rw-r--r--test/test_YoutubeDL.py5
1 files changed, 3 insertions, 2 deletions
diff --git a/test/test_YoutubeDL.py b/test/test_YoutubeDL.py
index ce9666171..0769e2ed2 100644
--- a/test/test_YoutubeDL.py
+++ b/test/test_YoutubeDL.py
@@ -818,8 +818,9 @@ class TestYoutubeDL(unittest.TestCase):
 
         def get_ids(params):
             ydl = YDL(params)
-            # make a copy because the dictionary can be modified
-            ydl.process_ie_result(playlist.copy())
+            # make a deep copy because the dictionary and nested entries
+            # can be modified
+            ydl.process_ie_result(copy.deepcopy(playlist))
             return [int(v['id']) for v in ydl.downloaded_info_dicts]
 
         result = get_ids({})