diff --git a/tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests.csproj b/tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests.csproj
index d3f010b14..e0f49ed45 100644
--- a/tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests.csproj
+++ b/tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests/TestableIO.System.IO.Abstractions.TestingHelpers.Tests.csproj
@@ -34,7 +34,7 @@
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     <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.0.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.10.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
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diff --git a/tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj b/tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj
index 2115e283d..79a75f857 100644
--- a/tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj
+++ b/tests/TestableIO.System.IO.Abstractions.Wrappers.Tests/TestableIO.System.IO.Abstractions.Wrappers.Tests.csproj
@@ -19,10 +19,10 @@
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     <PackageReference Include="Moq" Version="4.20.70" />
-    <PackageReference Include="NUnit" Version="3.14.0" />
+    <PackageReference Include="NUnit" Version="4.0.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.10.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="Snapshooter.NUnit" Version="0.13.0" />
+    <PackageReference Include="Snapshooter.NUnit" Version="0.14.0" />
   </ItemGroup>
   <PropertyGroup>
     <!--
@@ -30,4 +30,14 @@
     -->
     <EnableUnsafeBinaryFormatterSerialization Condition="'$(TargetFramework)' == 'net8.0'">true</EnableUnsafeBinaryFormatterSerialization>
   </PropertyGroup>
+  <!--
+    Snapshooter is currently broken when referencing NUnit 4 from a .NET 4.6.2 project.
+    The following blocks work around this by referencing NUnit 3 in that case.
+  -->
+  <PropertyGroup>
+    <_Net462NUnitVersion>3.14.0</_Net462NUnitVersion>
+  </PropertyGroup>
+  <ItemGroup Condition="'$(TargetFramework)' == 'net462'">
+    <PackageReference Update="NUnit" Version="$(_Net462NUnitVersion)" />
+  </ItemGroup>
 </Project>