diff --git a/src/Directory.build.props b/src/Directory.build.props
index 74383c7f2..cf54c9fc4 100644
--- a/src/Directory.build.props
+++ b/src/Directory.build.props
@@ -40,7 +40,7 @@
     <PackageReference Include="xunit" 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>