diff --git a/winml/test/api/RawApiTests.cpp b/winml/test/api/RawApiTests.cpp
index b25383c782..d067545379 100644
--- a/winml/test/api/RawApiTests.cpp
+++ b/winml/test/api/RawApiTests.cpp
@@ -24,7 +24,7 @@ auto CreateModelAsBuffer(const wchar_t* model_path)
 }
 
 static void RawApiTestsApiTestsClassSetup() {
-  WINML_EXPECT_HRESULT_SUCCEEDED(RoInitialize(RO_INIT_TYPE::RO_INIT_SINGLETHREADED));
+  WINML_EXPECT_HRESULT_SUCCEEDED(RoInitialize(RO_INIT_TYPE::RO_INIT_MULTITHREADED));
 }
 
 static void CreateModelFromFilePath() {
diff --git a/winml/test/api/RawApiTestsGpu.cpp b/winml/test/api/RawApiTestsGpu.cpp
index aa71be10c2..0be2a2bfbc 100644
--- a/winml/test/api/RawApiTestsGpu.cpp
+++ b/winml/test/api/RawApiTestsGpu.cpp
@@ -101,7 +101,7 @@ ml::learning_model_device CreateDevice(DeviceType deviceType)
 }
 
 static void RawApiTestsGpuApiTestsClassSetup() {
-  WINML_EXPECT_HRESULT_SUCCEEDED(RoInitialize(RO_INIT_TYPE::RO_INIT_SINGLETHREADED));
+  WINML_EXPECT_HRESULT_SUCCEEDED(RoInitialize(RO_INIT_TYPE::RO_INIT_MULTITHREADED));
 }
 
 static void CreateDirectXDevice() {