diff --git a/funURL.CLI.Tests/funURL.CLI.Tests.csproj b/funURL.CLI.Tests/funURL.CLI.Tests.csproj
index 1d3bcb7..1a690c4 100644
--- a/funURL.CLI.Tests/funURL.CLI.Tests.csproj
+++ b/funURL.CLI.Tests/funURL.CLI.Tests.csproj
@@ -11,7 +11,7 @@
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-    <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0">
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