diff --git a/fastkml/gx.py b/fastkml/gx.py
index 5005529c..a2884fd5 100644
--- a/fastkml/gx.py
+++ b/fastkml/gx.py
@@ -483,7 +483,7 @@ def __init__(
             ValueError: If both geometry and tracks are specified.
 
         """
-        self.tracks = list(tracks) if tracks else []
+        self.tracks = [t for t in tracks if t] if tracks else []
         self.interpolate = interpolate
         super().__init__(
             ns=ns,
diff --git a/tests/hypothesis/gx_test.py b/tests/hypothesis/gx_test.py
index 962d1a63..2fb4d110 100644
--- a/tests/hypothesis/gx_test.py
+++ b/tests/hypothesis/gx_test.py
@@ -105,8 +105,6 @@ def test_fuzz_track_track_items(
             st.lists(
                 st.builds(
                     fastkml.gx.Track,
-                    id=st.one_of(st.none(), nc_name()),
-                    target_id=st.one_of(st.none(), nc_name()),
                     altitude_mode=st.one_of(
                         st.none(),
                         st.sampled_from(fastkml.enums.AltitudeMode),
@@ -132,10 +130,15 @@ def test_fuzz_multi_track(
         tracks: typing.Optional[typing.Iterable[fastkml.gx.Track]],
         interpolate: typing.Optional[bool],
     ) -> None:
-        fastkml.gx.MultiTrack(
+        multi_track = fastkml.gx.MultiTrack(
             id=id,
             target_id=target_id,
             altitude_mode=altitude_mode,
             tracks=tracks,
             interpolate=interpolate,
         )
+
+        assert_repr_roundtrip(multi_track)
+        assert_str_roundtrip(multi_track)
+        assert_str_roundtrip_terse(multi_track)
+        assert_str_roundtrip_verbose(multi_track)