diff --git a/pkg/vm/lib/transformations/type_flow/summary_collector.dart b/pkg/vm/lib/transformations/type_flow/summary_collector.dart
index 6ca02d45373..f1e05c72f92 100644
--- a/pkg/vm/lib/transformations/type_flow/summary_collector.dart
+++ b/pkg/vm/lib/transformations/type_flow/summary_collector.dart
@@ -1597,7 +1597,6 @@ class SummaryCollector extends RecursiveResultVisitor<TypeExpr?> {
     }
   }
 
-  // Tests subtypes ignoring any nullabilities.
   bool _isSubtype(DartType subtype, DartType supertype) =>
       _environment.isSubtypeOf(subtype, supertype);