diff --git a/benchmarks/NSubstitute.Analyzers.Benchmarks/CSharp/CSharpDiagnosticAnalyzersBenchmarks.cs b/benchmarks/NSubstitute.Analyzers.Benchmarks/CSharp/CSharpDiagnosticAnalyzersBenchmarks.cs
index a94bce65..252fe780 100644
--- a/benchmarks/NSubstitute.Analyzers.Benchmarks/CSharp/CSharpDiagnosticAnalyzersBenchmarks.cs
+++ b/benchmarks/NSubstitute.Analyzers.Benchmarks/CSharp/CSharpDiagnosticAnalyzersBenchmarks.cs
@@ -5,7 +5,7 @@
 
 namespace NSubstitute.Analyzers.Benchmarks.CSharp;
 
-public sealed class CSharpDiagnosticAnalyzersBenchmarks : AbstractDiagnosticAnalyzersBenchmarks
+public class CSharpDiagnosticAnalyzersBenchmarks : AbstractDiagnosticAnalyzersBenchmarks
 {
     protected override AnalyzerBenchmark CallInfoAnalyzerBenchmark { get; }
 
diff --git a/benchmarks/NSubstitute.Analyzers.Benchmarks/VisualBasic/VisualBasicDiagnosticAnalyzersBenchmarks.cs b/benchmarks/NSubstitute.Analyzers.Benchmarks/VisualBasic/VisualBasicDiagnosticAnalyzersBenchmarks.cs
index d784e83b..0d1a495d 100644
--- a/benchmarks/NSubstitute.Analyzers.Benchmarks/VisualBasic/VisualBasicDiagnosticAnalyzersBenchmarks.cs
+++ b/benchmarks/NSubstitute.Analyzers.Benchmarks/VisualBasic/VisualBasicDiagnosticAnalyzersBenchmarks.cs
@@ -5,7 +5,7 @@
 
 namespace NSubstitute.Analyzers.Benchmarks.VisualBasic;
 
-public sealed class VisualBasicDiagnosticAnalyzersBenchmarks : AbstractDiagnosticAnalyzersBenchmarks
+public class VisualBasicDiagnosticAnalyzersBenchmarks : AbstractDiagnosticAnalyzersBenchmarks
 {
     protected override AnalyzerBenchmark CallInfoAnalyzerBenchmark { get; }