diff --git a/src/Directory.build.props b/src/Directory.build.props
index 1bb15ddd93..de7c02d56c 100644
--- a/src/Directory.build.props
+++ b/src/Directory.build.props
@@ -48,7 +48,7 @@
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
     <PackageReference Include="Xunit.StaFact" Version="0.3.18" />
     <PackageReference Include="Shouldly" Version="4.0.0-beta0002" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.2.0" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.3.1" />
     <PackageReference Include="PublicApiGenerator" Version="9.3.0" />
   </ItemGroup>
   
diff --git a/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj b/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
index 7a03238e4e..c818e0a7d1 100644
--- a/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
+++ b/src/ReactiveUI.Testing/ReactiveUI.Testing.csproj
@@ -11,7 +11,7 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.2.0" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.3.1" />
     <ProjectReference Include="..\ReactiveUI\ReactiveUI.csproj" />
   </ItemGroup>
 
diff --git a/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj b/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
index 8c26cb145e..8d6afb71a8 100644
--- a/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
+++ b/src/ReactiveUI.Tests/ReactiveUI.Tests.csproj
@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.2.0" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.3.1" />
   </ItemGroup>
   
   <ItemGroup>