diff --git a/Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/Tests.System.Reactive.ApiApprovals.csproj b/Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/Tests.System.Reactive.ApiApprovals.csproj
index a324d8f2f..2ec3796a6 100644
--- a/Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/Tests.System.Reactive.ApiApprovals.csproj
+++ b/Rx.NET/Source/tests/Tests.System.Reactive.ApiApprovals/Tests.System.Reactive.ApiApprovals.csproj
@@ -25,7 +25,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Verify.Xunit" Version="20.4.0" />
     <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" />
diff --git a/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj b/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
index 65eb48bad..d81cc9138 100644
--- a/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
+++ b/Rx.NET/Source/tests/Tests.System.Reactive/Tests.System.Reactive.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="MSBuild.Sdk.Extras">
+<Project Sdk="MSBuild.Sdk.Extras">
 
   <PropertyGroup>
     <TargetFrameworks>net472;net6.0;net7.0;net6.0-windows10.0.19041</TargetFrameworks>
@@ -28,7 +28,7 @@
     Before that PR was merged, the test runner wouldn't work if the host specified a TFM with a
     specific Windows version.
 -->
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.0.2" />
     <PackageReference Include="MSTest.TestFramework" Version="3.0.2" />
     <PackageReference Include="xunit.assert" Version="2.4.2" />