diff --git a/VisualC-WinRT/tests/loopwave/loopwave_VS2012.vcxproj b/VisualC-WinRT/tests/loopwave/loopwave_VS2012.vcxproj
index fcaee1d24..14e57e5fd 100644
--- a/VisualC-WinRT/tests/loopwave/loopwave_VS2012.vcxproj
+++ b/VisualC-WinRT/tests/loopwave/loopwave_VS2012.vcxproj
@@ -106,7 +106,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
     <ClCompile>
-      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">NotUsing</PrecompiledHeader>
@@ -114,7 +114,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
     <ClCompile>
-      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">NotUsing</PrecompiledHeader>
diff --git a/VisualC-WinRT/tests/testthread/testthread_VS2012.vcxproj b/VisualC-WinRT/tests/testthread/testthread_VS2012.vcxproj
index 2a515b31e..1940fe315 100644
--- a/VisualC-WinRT/tests/testthread/testthread_VS2012.vcxproj
+++ b/VisualC-WinRT/tests/testthread/testthread_VS2012.vcxproj
@@ -106,7 +106,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
     <ClCompile>
-      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">NotUsing</PrecompiledHeader>
@@ -117,7 +117,7 @@
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
     <ClCompile>
-      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_CRT_SECURE_NO_WARNINGS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">NotUsing</PrecompiledHeader>
       <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">NotUsing</PrecompiledHeader>