diff --git a/csharp/OnnxRuntime.CSharp.proj b/csharp/OnnxRuntime.CSharp.proj
index 4a0c999e4a..d5077c3c20 100644
--- a/csharp/OnnxRuntime.CSharp.proj
+++ b/csharp/OnnxRuntime.CSharp.proj
@@ -45,7 +45,7 @@ CMake creates a target to this project
              Properties="Platform=AnyCPU"
              />
     <MSBuild Projects="test\Microsoft.ML.OnnxRuntime.Tests\Microsoft.ML.OnnxRuntime.Tests.csproj"
-             Targets="Build" 
+             Targets="Build"
              />
     <MSBuild Projects="tools\Microsoft.ML.OnnxRuntime.PerfTool\Microsoft.ML.OnnxRuntime.PerfTool.csproj"
              Targets="Build" 
diff --git a/csharp/test/Microsoft.ML.OnnxRuntime.Tests/Microsoft.ML.OnnxRuntime.Tests.csproj b/csharp/test/Microsoft.ML.OnnxRuntime.Tests/Microsoft.ML.OnnxRuntime.Tests.csproj
index 8f58977d36..91aeb780e9 100644
--- a/csharp/test/Microsoft.ML.OnnxRuntime.Tests/Microsoft.ML.OnnxRuntime.Tests.csproj
+++ b/csharp/test/Microsoft.ML.OnnxRuntime.Tests/Microsoft.ML.OnnxRuntime.Tests.csproj
@@ -4,6 +4,7 @@
     <TargetFramework>netcoreapp2.0</TargetFramework>
     <IsPackable>false</IsPackable>
     <OnnxRuntimeCsharpRoot>..\..</OnnxRuntimeCsharpRoot>
+    <Platform>x64</Platform>
     <buildDirectory Condition="'$(buildDirectory)'==''">$(OnnxRuntimeCsharpRoot)\..\build\Windows</buildDirectory>
     <NativeBuildOutputDir>$(buildDirectory)\$(Configuration)\$(Configuration)</NativeBuildOutputDir>
   </PropertyGroup>