diff --git a/beetsplug/spotify.py b/beetsplug/spotify.py
index 15a57c788..6a211052e 100644
--- a/beetsplug/spotify.py
+++ b/beetsplug/spotify.py
@@ -24,7 +24,6 @@ class SpotifyPlugin(BeetsPlugin):
     album_url = 'https://api.spotify.com/v1/albums/'
     track_url = 'https://api.spotify.com/v1/tracks/'
     playlist_partial = 'spotify:trackset:Playlist:'
-    id_regex = r'(^|open\.spotify\.com/{}/)([0-9A-Za-z]{{22}})'
 
     def __init__(self):
         super(SpotifyPlugin, self).__init__()
@@ -126,8 +125,11 @@ class SpotifyPlugin(BeetsPlugin):
         :return: Spotify ID
         :rtype: str
         """
+        # Spotify IDs consist of 22 alphanumeric characters
+        # (zero-left-padded base62 representation of randomly generated UUID4)
+        id_regex = r'(^|open\.spotify\.com/{}/)([0-9A-Za-z]{{22}})'
         self._log.debug(u'Searching for {} {}', url_type, id_)
-        match = re.search(self.id_regex.format(url_type), id_)
+        match = re.search(id_regex.format(url_type), id_)
         return match.group(2) if match else None
 
     def album_for_id(self, album_id):
diff --git a/test/test_spotify.py b/test/test_spotify.py
index 90a629c34..221c21e74 100644
--- a/test/test_spotify.py
+++ b/test/test_spotify.py
@@ -71,7 +71,7 @@ class SpotifyPluginTest(_common.TestCase, TestHelper):
 
         responses.add(
             responses.GET,
-            spotify.SpotifyPlugin.base_url,
+            spotify.SpotifyPlugin.search_url,
             body=response_body,
             status=200,
             content_type='application/json',
@@ -103,7 +103,7 @@ class SpotifyPluginTest(_common.TestCase, TestHelper):
 
         responses.add(
             responses.GET,
-            spotify.SpotifyPlugin.base_url,
+            spotify.SpotifyPlugin.search_url,
             body=response_body,
             status=200,
             content_type='application/json',