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 b055fae..c760004 100644
--- a/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj
+++ b/src/ReactiveMarbles.CacheDatabase.Settings.Tests/ReactiveMarbles.CacheDatabase.Settings.Tests.csproj
@@ -21,7 +21,7 @@
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.10.0" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
-    <PackageReference Include="ReactiveUI.Testing" Version="18.4.26" />
+    <PackageReference Include="ReactiveUI.Testing" Version="18.4.34" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj b/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
index 488badb..9d92ed3 100644
--- a/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
+++ b/src/ReactiveMarbles.CacheDatabase.Tests/ReactiveMarbles.CacheDatabase.Tests.csproj
@@ -23,7 +23,7 @@
     </PackageReference>
     <PackageReference Include="FluentAssertions" Version="6.10.0" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="5.0.0" />
-    <PackageReference Include="ReactiveUI.Testing" Version="18.4.26" />
+    <PackageReference Include="ReactiveUI.Testing" Version="18.4.34" />
   </ItemGroup>
 
   <ItemGroup>