diff --git a/build/DependencyVersions.props b/build/DependencyVersions.props
index efe394cf1..f12b76a57 100644
--- a/build/DependencyVersions.props
+++ b/build/DependencyVersions.props
@@ -40,7 +40,7 @@
     <NuGetPackagingPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetPackagingPackageVersion>
     <NuGetProjectModelPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetProjectModelPackageVersion>
     <NuGetVersioningPackageVersion>$(NuGetBuildTasksPackageVersion)</NuGetVersioningPackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.5.0</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.0-preview-20180109-01</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftTestPlatformCLIPackageVersion>$(MicrosoftNETTestSdkPackageVersion)</MicrosoftTestPlatformCLIPackageVersion>
     <MicrosoftTestPlatformBuildPackageVersion>$(MicrosoftNETTestSdkPackageVersion)</MicrosoftTestPlatformBuildPackageVersion>
     <XliffTasksPackageVersion>0.2.0-beta-000042</XliffTasksPackageVersion>