diff --git a/src/backends/backendsCommon/test/EndToEndTestImpl.hpp b/src/backends/backendsCommon/test/EndToEndTestImpl.hpp
index 73cef16..bd5466a 100644
--- a/src/backends/backendsCommon/test/EndToEndTestImpl.hpp
+++ b/src/backends/backendsCommon/test/EndToEndTestImpl.hpp
@@ -210,8 +210,8 @@
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
     // Optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
     CHECK(optNet);
 
@@ -278,9 +278,9 @@
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
     // Optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
-    optimizedOptions.m_ExportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
+    optimizedOptions.SetExportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
     CHECK(optNet);
 
@@ -353,9 +353,9 @@
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
     // Optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
-    optimizedOptions.m_ExportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
+    optimizedOptions.SetExportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
     CHECK(optNet);
 
@@ -441,8 +441,8 @@
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
     // optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
 
     INFO("Load Network");
@@ -531,8 +531,8 @@
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
     // optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ExportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetExportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
 
     INFO("Load Network");
@@ -620,9 +620,9 @@
     input->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32, 0.0f, 0, true));
     pooling->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 1, 4 }, DataType::Float32));
 
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
-    optimizedOptions.m_ExportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
+    optimizedOptions.SetExportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
 
     INFO("Load Network");
@@ -714,9 +714,9 @@
     activation->GetOutputSlot(0).SetTensorInfo(TensorInfo({ 1, 1, 4, 1 }, DataType::Float32));
 
     // Optimize the network
-    OptimizerOptions optimizedOptions;
-    optimizedOptions.m_ImportEnabled = true;
-    optimizedOptions.m_ExportEnabled = true;
+    OptimizerOptionsOpaque optimizedOptions;
+    optimizedOptions.SetImportEnabled(true);
+    optimizedOptions.SetExportEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optimizedOptions);
 
     // Loads it into the runtime.
diff --git a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
index 226e2b3..c5f9869 100644
--- a/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
+++ b/src/backends/backendsCommon/test/JsonPrinterTestImpl.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright © 2017 Arm Ltd. All rights reserved.
+// Copyright © 2017, 2023 Arm Ltd. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
@@ -157,8 +157,8 @@
     softmax->GetOutputSlot(0).SetTensorInfo(outputTensorInfo);
 
     // optimize the network
-    armnn::OptimizerOptions optOptions;
-    optOptions.m_ProfilingEnabled = true;
+    armnn::OptimizerOptionsOpaque optOptions;
+    optOptions.SetProfilingEnabled(true);
     IOptimizedNetworkPtr optNet = Optimize(*net, backends, runtime->GetDeviceSpec(), optOptions);
     if(!optNet)
     {
diff --git a/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp b/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
index 5e619df..ce1eea4 100644
--- a/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
+++ b/src/backends/backendsCommon/test/OptimizedNetworkTests.cpp
@@ -93,7 +93,7 @@
 
     try
     {
-        Optimize(*net, backends, runtime->GetDeviceSpec(), armnn::OptimizerOptions(), errMessages);
+        Optimize(*net, backends, runtime->GetDeviceSpec(), armnn::OptimizerOptionsOpaque(), errMessages);
         FAIL("Should have thrown an exception.");
     }
     catch (const armnn::InvalidArgumentException&)
@@ -213,7 +213,8 @@
 
     try
     {
-        Optimize(*net, backends, runtime->GetDeviceSpec(), armnn::OptimizerOptions(), errMessages);
+        Optimize(*net, backends, runtime->GetDeviceSpec(),
+                 armnn::OptimizerOptionsOpaque(), errMessages);
         FAIL("Should have thrown an exception.");
     }
     catch (const armnn::InvalidArgumentException&)
@@ -421,7 +422,8 @@
 
     std::vector<armnn::BackendId> preferredBackends { "CpuRef" };
     armnn::ModelOptions modelOptions;
-    armnn::OptimizerOptions optimizerOptions(false, false, false, false, modelOptions, false);
+    armnn::OptimizerOptionsOpaque optimizerOptions(false, false, false,
+                                                   false, modelOptions, false);
     std::vector<std::string> errorMessages;
 
     // optimize the network.