diff --git a/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj b/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
index bd575fd9..42218604 100644
--- a/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
+++ b/src/ReactiveUI.Validation.Tests/ReactiveUI.Validation.Tests.csproj
@@ -10,7 +10,7 @@
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+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.console" Version="2.9.2" />
     <PackageReference Include="Xunit.StaFact" Version="1.1.11" />