diff --git a/tests/System.IO.Abstractions.TestingHelpers.Tests/System.IO.Abstractions.TestingHelpers.Tests.csproj b/tests/System.IO.Abstractions.TestingHelpers.Tests/System.IO.Abstractions.TestingHelpers.Tests.csproj
index 7480e13e6..1cada926a 100644
--- a/tests/System.IO.Abstractions.TestingHelpers.Tests/System.IO.Abstractions.TestingHelpers.Tests.csproj
+++ b/tests/System.IO.Abstractions.TestingHelpers.Tests/System.IO.Abstractions.TestingHelpers.Tests.csproj
@@ -36,7 +36,7 @@
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     <PackageReference Include="nunit" Version="3.13.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.2.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
diff --git a/tests/System.IO.Abstractions.Tests/System.IO.Abstractions.Tests.csproj b/tests/System.IO.Abstractions.Tests/System.IO.Abstractions.Tests.csproj
index 3dbc71600..54163e5ef 100644
--- a/tests/System.IO.Abstractions.Tests/System.IO.Abstractions.Tests.csproj
+++ b/tests/System.IO.Abstractions.Tests/System.IO.Abstractions.Tests.csproj
@@ -20,7 +20,7 @@
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     <PackageReference Include="nunit" Version="3.13.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.2.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="Snapshooter.NUnit" Version="0.7.1" />
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 </Project>