diff --git a/mux/fmp4/src/fmp4mux/imp.rs b/mux/fmp4/src/fmp4mux/imp.rs
index 016ed072..1470e608 100644
--- a/mux/fmp4/src/fmp4mux/imp.rs
+++ b/mux/fmp4/src/fmp4mux/imp.rs
@@ -849,7 +849,7 @@ impl FMP4Mux {
     // Caps/tag changes are allowed only in case that the
     // header-update-mode is None.
     //
-    // CAUTION: This function logs a warning if operation is not
+    // CAUTION: This function logs an error if operation is not
     // allowed so it should be evaluated only in case the caps/tags
     // would change otherwise (e. g. right-most operand in boolean
     // expressions).
diff --git a/mux/fmp4/tests/tests.rs b/mux/fmp4/tests/tests.rs
index 3803cf28..af5aacc8 100644
--- a/mux/fmp4/tests/tests.rs
+++ b/mux/fmp4/tests/tests.rs
@@ -2580,8 +2580,6 @@ fn test_language_change_at_gop_boundary() {
         assert_eq!(h.push(buffer), Ok(gst::FlowSuccess::Ok));
     }
 
-    //test_caps_changed_buffers(&mut h, 30, 10, 10, 100, true, false);
-
     h.crank_single_clock_wait().unwrap();
     // Initial fragment with HEADER and DISCONT
     test_caps_changed_verify(&mut h, 1 + 1 + 10, true, false);