diff --git a/Calee.Scheduler.Tests/Calee.Scheduler.Tests.csproj b/Calee.Scheduler.Tests/Calee.Scheduler.Tests.csproj
index ecc9b48..b1677ef 100644
--- a/Calee.Scheduler.Tests/Calee.Scheduler.Tests.csproj
+++ b/Calee.Scheduler.Tests/Calee.Scheduler.Tests.csproj
@@ -15,7 +15,7 @@
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+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
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     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5" />
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