diff --git a/youtube_dl/extractor/rai.py b/youtube_dl/extractor/rai.py
index ef1ba87a8..c169ff811 100644
--- a/youtube_dl/extractor/rai.py
+++ b/youtube_dl/extractor/rai.py
@@ -558,7 +558,7 @@ class RaiPlayRadioIE(RaiPlayRadioBaseIE):
             'ext': 'mp3',
             'title': 'Dal "Chiaro di luna" al  "Clair de lune", '
                      'prima parte con Giovanni Bietti',
-            'thumbnail': 'https://www.raiplayradio.it/cropgd/400x400/dl/img/2019/07/08/1562590329054_luna.jpg',
+            'thumbnail': r're:^https?://.*\.jpg$',
             'language': 'it',
     }}