diff --git a/src/Recyclarr.Cli/Command/Helpers/CacheStoragePath.cs b/src/Recyclarr.Cli/Command/Helpers/CacheStoragePath.cs
index fc9f002b..8873845a 100644
--- a/src/Recyclarr.Cli/Command/Helpers/CacheStoragePath.cs
+++ b/src/Recyclarr.Cli/Command/Helpers/CacheStoragePath.cs
@@ -1,4 +1,5 @@
 using System.Data.HashFunction.FNV;
+using System.Globalization;
 using System.IO.Abstractions;
 using System.Text;
 using Recyclarr.TrashLib.Cache;
@@ -33,7 +34,7 @@ public class CacheStoragePath : ICacheStoragePath
     public IFileInfo CalculatePath(string cacheObjectName)
     {
         return _paths.CacheDirectory
-            .SubDirectory(_serviceCommand.Name.ToLower())
+            .SubDirectory(_serviceCommand.Name.ToLower(CultureInfo.CurrentCulture))
             .SubDirectory(_config.Name ?? BuildServiceGuid())
             .File(cacheObjectName + ".json");
     }
diff --git a/src/Recyclarr.Common.Tests/Extensions/DictionaryExtensionsTest.cs b/src/Recyclarr.Common.Tests/Extensions/DictionaryExtensionsTest.cs
index 5ff6d610..eb2dc2ae 100644
--- a/src/Recyclarr.Common.Tests/Extensions/DictionaryExtensionsTest.cs
+++ b/src/Recyclarr.Common.Tests/Extensions/DictionaryExtensionsTest.cs
@@ -8,7 +8,7 @@ namespace Recyclarr.Common.Tests.Extensions;
 [Parallelizable(ParallelScope.All)]
 public class DictionaryExtensionsTest
 {
-    private class MySampleValue
+    private sealed class MySampleValue
     {
     }
 
diff --git a/src/Recyclarr.TestLibrary/NSubstitute/Verify.cs b/src/Recyclarr.TestLibrary/NSubstitute/Verify.cs
index 200837bf..baea09eb 100644
--- a/src/Recyclarr.TestLibrary/NSubstitute/Verify.cs
+++ b/src/Recyclarr.TestLibrary/NSubstitute/Verify.cs
@@ -15,7 +15,7 @@ public static class Verify
         return ArgumentMatcher.Enqueue(new AssertionMatcher<T>(action));
     }
 
-    private class AssertionMatcher<T> : IArgumentMatcher<T>
+    private sealed class AssertionMatcher<T> : IArgumentMatcher<T>
     {
         private readonly Action<T> _assertion;
 
diff --git a/src/Recyclarr.TrashLib.Tests/Cache/ServiceCacheTest.cs b/src/Recyclarr.TrashLib.Tests/Cache/ServiceCacheTest.cs
index 58d1245c..76cd73ba 100644
--- a/src/Recyclarr.TrashLib.Tests/Cache/ServiceCacheTest.cs
+++ b/src/Recyclarr.TrashLib.Tests/Cache/ServiceCacheTest.cs
@@ -14,20 +14,20 @@ namespace Recyclarr.TrashLib.Tests.Cache;
 [Parallelizable(ParallelScope.All)]
 public class ServiceCacheTest
 {
-    private class ObjectWithoutAttribute
+    private sealed class ObjectWithoutAttribute
     {
     }
 
     private const string ValidObjectName = "azAZ_09";
 
     [CacheObjectName(ValidObjectName)]
-    private class ObjectWithAttribute
+    private sealed class ObjectWithAttribute
     {
         public string TestValue { get; init; } = "";
     }
 
     [CacheObjectName("invalid+name")]
-    private class ObjectWithAttributeInvalidChars
+    private sealed class ObjectWithAttributeInvalidChars
     {
     }
 
diff --git a/src/Recyclarr.TrashLib.Tests/CustomFormat/CachePersisterTest.cs b/src/Recyclarr.TrashLib.Tests/CustomFormat/CachePersisterTest.cs
index 0518f71f..74161ee0 100644
--- a/src/Recyclarr.TrashLib.Tests/CustomFormat/CachePersisterTest.cs
+++ b/src/Recyclarr.TrashLib.Tests/CustomFormat/CachePersisterTest.cs
@@ -16,7 +16,7 @@ namespace Recyclarr.TrashLib.Tests.CustomFormat;
 [Parallelizable(ParallelScope.All)]
 public class CachePersisterTest
 {
-    private class Context
+    private sealed class Context
     {
         public Context()
         {
diff --git a/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideProcessorTest.cs b/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideProcessorTest.cs
index abc5e1b8..71c6584e 100644
--- a/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideProcessorTest.cs
+++ b/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideProcessorTest.cs
@@ -19,14 +19,14 @@ namespace Recyclarr.TrashLib.Tests.CustomFormat.Processors;
 [Parallelizable(ParallelScope.All)]
 public class GuideProcessorTest
 {
-    private class TestGuideProcessorSteps : IGuideProcessorSteps
+    private sealed class TestGuideProcessorSteps : IGuideProcessorSteps
     {
         public ICustomFormatStep CustomFormat { get; } = new CustomFormatStep();
         public IConfigStep Config { get; } = new ConfigStep();
         public IQualityProfileStep QualityProfile { get; } = new QualityProfileStep();
     }
 
-    private class Context
+    private sealed class Context
     {
         public Context()
         {
diff --git a/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideSteps/CustomFormatStepTest.cs b/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideSteps/CustomFormatStepTest.cs
index 0b81b7fe..f29fce0a 100644
--- a/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideSteps/CustomFormatStepTest.cs
+++ b/src/Recyclarr.TrashLib.Tests/CustomFormat/Processors/GuideSteps/CustomFormatStepTest.cs
@@ -15,7 +15,7 @@ namespace Recyclarr.TrashLib.Tests.CustomFormat.Processors.GuideSteps;
 [Parallelizable(ParallelScope.All)]
 public class CustomFormatStepTest
 {
-    private class Context
+    private sealed class Context
     {
         public List<CustomFormatData> TestGuideData { get; } = new()
         {
diff --git a/src/Recyclarr.TrashLib.Tests/Sonarr/SonarrCompatibilityTest.cs b/src/Recyclarr.TrashLib.Tests/Sonarr/SonarrCompatibilityTest.cs
index b5b1ffa5..91a8b0fb 100644
--- a/src/Recyclarr.TrashLib.Tests/Sonarr/SonarrCompatibilityTest.cs
+++ b/src/Recyclarr.TrashLib.Tests/Sonarr/SonarrCompatibilityTest.cs
@@ -25,7 +25,7 @@ namespace Recyclarr.TrashLib.Tests.Sonarr;
 [Parallelizable(ParallelScope.All)]
 public class SonarrCompatibilityTest
 {
-    private class TestContext : IDisposable
+    private sealed class TestContext : IDisposable
     {
         private readonly JsonSerializerSettings _jsonSettings;