diff --git a/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj b/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj
index 4064d33..afac3e1 100644
--- a/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj
+++ b/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj
@@ -20,7 +20,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.11.0" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.0" />
     <PackageReference Include="ReactiveUI.Testing" Version="18.4.26" />
   </ItemGroup>
 
diff --git a/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj b/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
index b623ba4..f2b3e37 100644
--- a/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
+++ b/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
@@ -22,7 +22,7 @@
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.11.0" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="6.0.0" />
     <PackageReference Include="ReactiveUI.Testing" Version="18.4.26" />
   </ItemGroup>