diff --git a/Directory.Packages.props b/Directory.Packages.props
index 5ac3b6fb255..6ba4e051d7d 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -83,7 +83,7 @@
     <PackageVersion Include="OpenTelemetry.Extensions.Hosting" Version="1.19.1" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.19.0" />
     <PackageVersion Include="OpenTelemetry.Instrumentation.Http" Version="1.19.0" />
-    <PackageVersion Include="NUnit" Version="4.6.1" />
+    <PackageVersion Include="NUnit" Version="5.0.0" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.15.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="6.3.0" />
     <PackageVersion Include="OneOf" Version="3.0.271" />
diff --git a/docs/docs/migration/nunit.md b/docs/docs/migration/nunit.md
index e904b30a44f..05dbf51fb38 100644
--- a/docs/docs/migration/nunit.md
+++ b/docs/docs/migration/nunit.md
@@ -290,7 +290,7 @@ await Assert.That(text).EndsWith(suffix);
 ```csharp
 // NUnit
 Assert.Throws<InvalidOperationException>(() => DoSomething());
-Assert.ThrowsAsync<InvalidOperationException>(async () => await DoSomethingAsync());
+await Assert.ThrowsAsync<InvalidOperationException>(async () => await DoSomethingAsync()); // NUnit 3/4: not awaited
 
 // TUnit
 Assert.Throws<InvalidOperationException>(() => DoSomething());
diff --git a/src/TUnit.Analyzers/Migrators/NUnitMigrationAnalyzer.cs b/src/TUnit.Analyzers/Migrators/NUnitMigrationAnalyzer.cs
index 861c0c584dc..5705eba6274 100644
--- a/src/TUnit.Analyzers/Migrators/NUnitMigrationAnalyzer.cs
+++ b/src/TUnit.Analyzers/Migrators/NUnitMigrationAnalyzer.cs
@@ -48,6 +48,8 @@ protected override bool IsFrameworkAvailable(Compilation compilation)
         // This prevents false positives after migration when NUnit assembly has been removed
         return compilation.GetTypeByMetadataName("NUnit.Framework.TestAttribute") != null ||
                compilation.GetTypeByMetadataName("NUnit.Framework.Legacy.ClassicAssert") != null ||
-               compilation.GetTypeByMetadataName("NUnit.Framework.Legacy.StringAssert") != null;
+               compilation.GetTypeByMetadataName("NUnit.Framework.Legacy.StringAssert") != null ||
+               // NUnit 5 moved StringAssert/CollectionAssert/FileAssert/DirectoryAssert back to NUnit.Framework
+               compilation.GetTypeByMetadataName("NUnit.Framework.StringAssert") != null;
     }
 }
\ No newline at end of file
diff --git a/tests/TUnit.Analyzers.Tests/NUnitMigrationAnalyzerTests.cs b/tests/TUnit.Analyzers.Tests/NUnitMigrationAnalyzerTests.cs
index 21c4c220583..7762fe1f93d 100644
--- a/tests/TUnit.Analyzers.Tests/NUnitMigrationAnalyzerTests.cs
+++ b/tests/TUnit.Analyzers.Tests/NUnitMigrationAnalyzerTests.cs
@@ -5734,16 +5734,32 @@ await CodeFixer.VerifyCodeFixAsync(
         );
     }
 
+    // NUnit 5 ships a net10.0 build referencing System.Runtime 10.0, which raises CS1705 against the
+    // verifiers' Net90 reference assemblies when the test runs on net10.0. The csproj copies NUnit's
+    // net8.0 build into the output directory; reference that instead of the runtime-loaded assembly.
+    private static string GetNUnitDllPath(string assemblyName)
+    {
+        var path = Path.Combine(AppContext.BaseDirectory, $"{assemblyName}.net8.0.dll");
+        if (!File.Exists(path))
+        {
+            throw new FileNotFoundException(
+                $"net8.0 build of {assemblyName} not found at '{path}'. Run 'dotnet build' before running analyzer tests.",
+                path);
+        }
+
+        return path;
+    }
+
     private static void ConfigureNUnitTest(Verifier.Test test)
     {
-        test.TestState.AdditionalReferences.Add(typeof(NUnit.Framework.TestAttribute).Assembly);
+        test.TestState.AdditionalReferences.Add(GetNUnitDllPath("nunit.framework"));
     }
 
     private static void ConfigureNUnitTest(CodeFixer.Test test)
     {
         // Add NUnit assemblies to TestState (for input code compilation)
-        test.TestState.AdditionalReferences.Add(typeof(NUnit.Framework.TestAttribute).Assembly);
-        test.TestState.AdditionalReferences.Add(typeof(NUnit.Framework.Legacy.ClassicAssert).Assembly);
+        test.TestState.AdditionalReferences.Add(GetNUnitDllPath("nunit.framework"));
+        test.TestState.AdditionalReferences.Add(GetNUnitDllPath("nunit.framework.legacy"));
 
         // FixedState: TUnit assemblies only (NO NUnit inheritance)
         // Use Explicit inheritance mode to prevent NUnit references from being inherited
diff --git a/tests/TUnit.Analyzers.Tests/TUnit.Analyzers.Tests.csproj b/tests/TUnit.Analyzers.Tests/TUnit.Analyzers.Tests.csproj
index 1cb4aa77c0b..4ca7cf56a52 100644
--- a/tests/TUnit.Analyzers.Tests/TUnit.Analyzers.Tests.csproj
+++ b/tests/TUnit.Analyzers.Tests/TUnit.Analyzers.Tests.csproj
@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.Testing.Extensions.HangDump" />
     <PackageReference Include="Polly" />
     <PackageReference Include="MSTest.TestFramework" />
-    <PackageReference Include="NUnit" />
+    <PackageReference Include="NUnit" GeneratePathProperty="true" />
     <PackageReference Include="xunit.v3.extensibility.core" />
     <PackageReference Include="xunit.v3.assert" />
     <PackageReference Include="System.Text.Json" Condition="'$(TargetFramework)' == 'net8.0'" GeneratePathProperty="true" PrivateAssets="all" />
@@ -45,6 +45,16 @@
           Link="System.Text.Json.9.0.dll"
           CopyToOutputDirectory="PreserveNewest"
           Visible="false" />
+    <!-- NUnit 5 ships a net10.0 build that references System.Runtime 10.0; referencing it from
+         the Net90 analyzer-test compilation raises CS1705. Use NUnit's net8.0 build instead. -->
+    <None Include="$(PkgNUnit)\lib\net8.0\nunit.framework.dll"
+          Link="nunit.framework.net8.0.dll"
+          CopyToOutputDirectory="PreserveNewest"
+          Visible="false" />
+    <None Include="$(PkgNUnit)\lib\net8.0\nunit.framework.legacy.dll"
+          Link="nunit.framework.legacy.net8.0.dll"
+          CopyToOutputDirectory="PreserveNewest"
+          Visible="false" />
     <Compile Include="..\SharedTestHelpers\AnalyzerTestCompatibility.cs"
              Link="Shared\AnalyzerTestCompatibility.cs" />
     <Compile Include="..\SharedTestHelpers\RulesDecouplingVerifier.cs"
diff --git a/tools/TUnit.DocSnippetGenerator/Program.cs b/tools/TUnit.DocSnippetGenerator/Program.cs
index 3574c43f47b..453a5c18428 100644
--- a/tools/TUnit.DocSnippetGenerator/Program.cs
+++ b/tools/TUnit.DocSnippetGenerator/Program.cs
@@ -656,8 +656,8 @@ static void AppendFrameworkAliases(StringBuilder builder, Snippet snippet)
             .AppendLine("using ValuesAttribute = global::NUnit.Framework.ValuesAttribute;")
             .AppendLine("using RangeAttribute = global::NUnit.Framework.RangeAttribute;")
             .AppendLine("using TestContext = global::NUnit.Framework.TestContext;")
-            .AppendLine("using CollectionAssert = global::NUnit.Framework.Legacy.CollectionAssert;")
-            .AppendLine("using StringAssert = global::NUnit.Framework.Legacy.StringAssert;")
+            .AppendLine("using CollectionAssert = global::NUnit.Framework.CollectionAssert;")
+            .AppendLine("using StringAssert = global::NUnit.Framework.StringAssert;")
             .AppendLine("using Is = global::NUnit.Framework.Is;")
             .AppendLine("using Does = global::NUnit.Framework.Does;")
             .AppendLine("using Has = global::NUnit.Framework.Has;");