diff --git a/tests/seek.rs b/tests/seek.rs
index 46df93d..4c49ad8 100644
--- a/tests/seek.rs
+++ b/tests/seek.rs
@@ -44,7 +44,7 @@ fn all_decoders(
 )]
 #[cfg_attr(feature = "symphonia-mp3", case("mp3", "symphonia"))]
 // note: disabled, broken decoder see issue: #577
-#[cfg_attr(feature = "symphonia-isomp4", case("m4a", "symphonia"))]
+// #[cfg_attr(feature = "symphonia-isomp4", case("m4a", "symphonia"))]
 #[cfg_attr(feature = "symphonia-wav", case("wav", "symphonia"))]
 #[cfg_attr(feature = "symphonia-flac", case("flac", "symphonia"))]
 fn supported_decoders(#[case] format: &'static str, #[case] decoder_name: &'static str) {}