diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 114685867d5a..e536e85cf839 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -675,13 +675,13 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>e77011b31a3e5c47d931248a64b47f9b2d47853d</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="1.6.0-preview.25065.17">
+    <Dependency Name="Microsoft.Testing.Platform" Version="1.6.0-preview.25066.11">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>f1995d7f35d960443efd1a7a6a713a41eaf35235</Sha>
+      <Sha>b9b7f768cd89eec461ba64ee3b016083bc9614fa</Sha>
     </Dependency>
-    <Dependency Name="MSTest" Version="3.8.0-preview.25065.17">
+    <Dependency Name="MSTest" Version="3.8.0-preview.25066.11">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>f1995d7f35d960443efd1a7a6a713a41eaf35235</Sha>
+      <Sha>b9b7f768cd89eec461ba64ee3b016083bc9614fa</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index ae5c80cc2f5c..1a0ca250a6bd 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -28,7 +28,7 @@
     <UsingToolMicrosoftNetCompilers Condition="'$(DotNetBuildSourceOnly)' == 'true'">true</UsingToolMicrosoftNetCompilers>
     <MicrosoftIORedistPackageVersion>6.0.1</MicrosoftIORedistPackageVersion>
     <FlagNetStandard1XDependencies Condition="'$(DotNetBuildSourceOnly)' == 'true'">true</FlagNetStandard1XDependencies>
-    <MicrosoftTestingPlatformVersion>1.6.0-preview.25065.17</MicrosoftTestingPlatformVersion>
+    <MicrosoftTestingPlatformVersion>1.6.0-preview.25066.11</MicrosoftTestingPlatformVersion>
   </PropertyGroup>
   <PropertyGroup Label="Servicing version information">
     <VersionFeature21>30</VersionFeature21>
@@ -289,7 +289,7 @@
     <FluentAssertionsVersion>6.12.0</FluentAssertionsVersion>
     <FluentAssertionsJsonVersion>6.1.0</FluentAssertionsJsonVersion>
     <MoqPackageVersion>4.18.4</MoqPackageVersion>
-    <MSTestVersion>3.8.0-preview.25065.17</MSTestVersion>
+    <MSTestVersion>3.8.0-preview.25066.11</MSTestVersion>
     <XunitCombinatorialVersion>1.3.2</XunitCombinatorialVersion>
     <MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>8.0.0-beta.23607.1</MicrosoftDotNetInstallerWindowsSecurityTestDataPackageVersion>
   </PropertyGroup>