diff --git a/eng/Version.Details.props b/eng/Version.Details.props
index 17dd5067d527..9cbad830b6ee 100644
--- a/eng/Version.Details.props
+++ b/eng/Version.Details.props
@@ -142,8 +142,8 @@ This file should be imported by eng/Versions.props
     <SystemTextJsonPackageVersion>10.0.6</SystemTextJsonPackageVersion>
     <SystemWindowsExtensionsPackageVersion>10.0.6</SystemWindowsExtensionsPackageVersion>
     <!-- microsoft-testfx dependencies -->
-    <MicrosoftTestingPlatformPackageVersion>2.2.0-preview.26174.1</MicrosoftTestingPlatformPackageVersion>
-    <MSTestPackageVersion>4.2.0-preview.26174.1</MSTestPackageVersion>
+    <MicrosoftTestingPlatformPackageVersion>2.2.1-preview.26177.4</MicrosoftTestingPlatformPackageVersion>
+    <MSTestPackageVersion>4.2.1-preview.26177.4</MSTestPackageVersion>
   </PropertyGroup>
   <!--Property group for alternate package version names-->
   <PropertyGroup>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 66edec17a66a..a1549244e65b 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -561,13 +561,13 @@
       <Uri>https://github.com/dotnet/dotnet</Uri>
       <Sha>645374ace1c8bbeb07aac743552acc62bbb2c34b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Testing.Platform" Version="2.2.0-preview.26174.1">
+    <Dependency Name="Microsoft.Testing.Platform" Version="2.2.1-preview.26177.4">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>926d2f3fbfce8f04a1c05e743d28715d93baa5bb</Sha>
+      <Sha>4bc0cfcc420247cf6111fca7f8e914a9706634dd</Sha>
     </Dependency>
-    <Dependency Name="MSTest" Version="4.2.0-preview.26174.1">
+    <Dependency Name="MSTest" Version="4.2.1-preview.26177.4">
       <Uri>https://github.com/microsoft/testfx</Uri>
-      <Sha>926d2f3fbfce8f04a1c05e743d28715d93baa5bb</Sha>
+      <Sha>4bc0cfcc420247cf6111fca7f8e914a9706634dd</Sha>
     </Dependency>
     <Dependency Name="Microsoft.Extensions.Configuration.Ini" Version="10.0.6">
       <Uri>https://github.com/dotnet/dotnet</Uri>