diff --git a/src/libraries/System.Runtime.InteropServices/tests/TestAssets/SharedTypes/ComInterfaces/IStatelessPinnableCollectionBlittableElements.cs b/src/libraries/System.Runtime.InteropServices/tests/TestAssets/SharedTypes/ComInterfaces/IStatelessPinnableCollectionBlittableElements.cs
index 26dcc22afeb7f0..f625af2d27e3b1 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/TestAssets/SharedTypes/ComInterfaces/IStatelessPinnableCollectionBlittableElements.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/TestAssets/SharedTypes/ComInterfaces/IStatelessPinnableCollectionBlittableElements.cs
@@ -50,12 +50,12 @@ internal unsafe struct StatelessPinnableCollectionNative<T> where T : unmanaged
     [ContiguousCollectionMarshaller]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ManagedToUnmanagedIn, typeof(StatelessPinnableCollectionMarshaller<,>.ManagedToUnmanaged))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.UnmanagedToManagedOut, typeof(StatelessPinnableCollectionMarshaller<,>.ManagedToUnmanaged))]
-    [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ElementIn, typeof(StatelessPinnableCollectionMarshaller<,>.ManagedToUnmanaged))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ManagedToUnmanagedOut, typeof(StatelessPinnableCollectionMarshaller<,>.UnmanagedToManaged))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.UnmanagedToManagedIn, typeof(StatelessPinnableCollectionMarshaller<,>.UnmanagedToManaged))]
-    [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ElementOut, typeof(StatelessPinnableCollectionMarshaller<,>.UnmanagedToManaged))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.UnmanagedToManagedRef, typeof(StatelessPinnableCollectionMarshaller<,>.Bidirectional))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ManagedToUnmanagedRef, typeof(StatelessPinnableCollectionMarshaller<,>.Bidirectional))]
+    [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ElementIn, typeof(StatelessPinnableCollectionMarshaller<,>.Bidirectional))]
+    [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ElementOut, typeof(StatelessPinnableCollectionMarshaller<,>.Bidirectional))]
     [CustomMarshaller(typeof(StatelessPinnableCollection<>), MarshalMode.ElementRef, typeof(StatelessPinnableCollectionMarshaller<,>.Bidirectional))]
     internal static unsafe class StatelessPinnableCollectionMarshaller<T, TUnmanagedElement>
         where T : unmanaged