And only if track not found. Keep raise for invalid API key, etc.

src/pylast/__init__.py

@@ -1592,7 +1592,12 @@ class _Opus(_BaseObject, _Taggable):
     def get_mbid(self):
         """Returns the MusicBrainz ID of the album or track."""
 
-        doc = self._request(self.ws_prefix + ".getInfo", cacheable=True)
+        try:
+            doc = self._request(self.ws_prefix + ".getInfo", cacheable=True)
+        except WSError as e:
+            if int(e.get_id()) == STATUS_INVALID_PARAMS and str(e) == "Track not found":
+                return None
+            raise
 
         try:
             lfm = doc.getElementsByTagName("lfm")[0]

tests/test_track.py

@@ -241,9 +241,16 @@ class TestPyLastTrack(TestPyLastWithLastFm):
         # Assert
         assert corrected_track_name == "Mr. Brownstone"
 
-    def test_track_with_no_mbid(self):
+    @pytest.mark.parametrize(
+        ("test_artist", "test_track"),
+        [
+            ("Static-X", "Set It Off"),  # Track with no MBID
+            ("Zytaris", "Shores of Life"),  # "Track not found"
+        ],
+    )
+    def test_track_with_no_mbid(self, test_artist, test_track):
         # Arrange
-        track = pylast.Track("Static-X", "Set It Off", self.network)
+        track = pylast.Track(test_track, test_artist, self.network)
 
         # Act
         mbid = track.get_mbid()