diff --git a/include/armnnTestUtils/MockBackend.hpp b/include/armnnTestUtils/MockBackend.hpp
index e5378bf..05df1b4 100644
--- a/include/armnnTestUtils/MockBackend.hpp
+++ b/include/armnnTestUtils/MockBackend.hpp
@@ -1,5 +1,5 @@
 //
-// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// Copyright © 2022-2023 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 #pragma once
@@ -320,6 +320,11 @@
                                                     reasonIfUnsupported);
                 }
             }
+            case LayerType::ElementwiseBinary:
+            {
+                auto elementwiseDesc = *(PolymorphicDowncast<const ElementwiseBinaryDescriptor*>(&descriptor));
+                return (elementwiseDesc.m_Operation == BinaryOperation::Add);
+            }
             default:
                 return false;
         }