Index: b/test/formats/test_id3.py
===================================================================
--- a/test/formats/test_id3.py
+++ b/test/formats/test_id3.py
@@ -266,5 +266,5 @@
         def test_rename_txxx_tags(self):
             file_path = os.path.join('test', 'data', 'test-id3-rename-tags.mp3')
-            filename = self.copy_file_tmp(file_path, 'mp3')
+            filename = self.copy_file_tmp(file_path, '.mp3')
             raw_metadata = load_raw(filename)
             self.assertIn('TXXX:Artists', raw_metadata)
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<tr><td><span title='2021-11-17 23:43:14 +0100'>2021-11-17</span></td><td><a href='/guix/commit/tests/egg.scm?id=3a317f7476f8c6012e166ff9f340f861938721c9'>Merge branch 'master' into core-updates-frozen</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-11-14 00:10:58 +0100'>2021-11-14</span></td><td><a href='/guix/commit/tests/egg.scm?id=114005bea61efcd5f7d768e2d6503e873f654c16'>tests: Adjust tests/egg.scm to latest API changes.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-07-20 23:43:29 +0200'>2021-07-20</span></td><td><a href='/guix/commit/tests/egg.scm?id=5b6285518be6e4f588f688dadf70eacf4614b797'>import: egg: Emit new-style package inputs.</a><span class='msg-avail'>...</span></td><td>Sarah Morgensen</td></tr>
<tr><td><span title='2021-06-03 13:05:18 +0200'>2021-06-03</span></td><td><a href='/guix/commit/tests/egg.scm?id=bdc298ecee15283451d3aa20a849dd7bb22c8538'>import: Add CHICKEN egg importer.</a><span class='msg-avail'>...</span></td><td>Xinglu Chen</td></tr>