diff --git a/sdk/core/azure-core-test/src/test_proxy_manager.cpp b/sdk/core/azure-core-test/src/test_proxy_manager.cpp
index c37212ebe..31d5797c1 100644
--- a/sdk/core/azure-core-test/src/test_proxy_manager.cpp
+++ b/sdk/core/azure-core-test/src/test_proxy_manager.cpp
@@ -19,7 +19,7 @@ using Azure::Core::_internal::Environment;
 
 TestMode TestProxyManager::GetTestMode()
 {
-  auto value = std::string{"PLAYBACK"}; // Environment::GetVariable("AZURE_TEST_MODE");
+  auto value = Environment::GetVariable("AZURE_TEST_MODE");
   if (value.empty())
   {
     return Azure::Core::Test::TestMode::LIVE;