diff --git a/tests/ImageSort.UnitTests/ImageSort.UnitTests.csproj b/tests/ImageSort.UnitTests/ImageSort.UnitTests.csproj
index 420823fc..57b78a98 100644
--- a/tests/ImageSort.UnitTests/ImageSort.UnitTests.csproj
+++ b/tests/ImageSort.UnitTests/ImageSort.UnitTests.csproj
@@ -12,7 +12,7 @@
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-    <PackageReference Include="ReactiveUI.Testing" Version="19.4.1" />
+    <PackageReference Include="ReactiveUI.Testing" Version="19.5.1" />
     <PackageReference Include="xunit" Version="2.5.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1">
       <PrivateAssets>all</PrivateAssets>