diff --git a/tests/ArgonComplexTest/ArgonComplexTest.csproj b/tests/ArgonComplexTest/ArgonComplexTest.csproj
index 3f64821c..18574aea 100644
--- a/tests/ArgonComplexTest/ArgonComplexTest.csproj
+++ b/tests/ArgonComplexTest/ArgonComplexTest.csproj
@@ -24,7 +24,7 @@
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.1" />
     <PackageReference Include="Microsoft.Orleans.TestingHost" Version="10.4.0" />
-    <PackageReference Include="NUnit" Version="4.6.1" />
+    <PackageReference Include="NUnit" Version="5.0.0" />
     <PackageReference Include="NUnit.Analyzers" Version="4.15.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/tests/ArgonSharedLogicTest/ArgonSharedLogicTest.csproj b/tests/ArgonSharedLogicTest/ArgonSharedLogicTest.csproj
index a5bf38c8..c3282da1 100644
--- a/tests/ArgonSharedLogicTest/ArgonSharedLogicTest.csproj
+++ b/tests/ArgonSharedLogicTest/ArgonSharedLogicTest.csproj
@@ -14,7 +14,7 @@
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     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.1" />
-    <PackageReference Include="NUnit" Version="4.6.1" />
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     <PackageReference Include="NUnit.Analyzers" Version="4.15.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>