diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1d0dace..abb2346 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: windows-latest
     steps:
     - name: Check out repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Build module - Debug
       shell: pwsh
@@ -38,7 +38,7 @@ jobs:
       if: ${{ env.BUILD_CONFIGURATION == 'Release' }}
 
     - name: Capture PowerShell Module
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: PSModule
         path: output/*.nupkg
@@ -60,10 +60,10 @@ jobs:
           os: windows-latest
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Restore Built PowerShell Module
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v8
       with:
         name: PSModule
         path: output
@@ -100,21 +100,21 @@ jobs:
 
     - name: Upload Test Results
       if: always()
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: Unit Test Results (${{ matrix.info.name }})
         path: ./output/TestResults/Pester.xml
 
     - name: Upload Coverage Results
       if: always() && !startsWith(github.ref, 'refs/tags/v')
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       with:
         name: Coverage Results (${{ matrix.info.name }})
         path: ./output/TestResults/Coverage.xml
 
     - name: Upload Coverage to codecov
       if: always() && !startsWith(github.ref, 'refs/tags/v')
-      uses: codecov/codecov-action@v4
+      uses: codecov/codecov-action@v6
       with:
         files: ./output/TestResults/Coverage.xml
         flags: ${{ matrix.info.name }}
@@ -128,7 +128,7 @@ jobs:
     runs-on: windows-latest
     steps:
     - name: Restore Built PowerShell Module
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v8
       with:
         name: PSModule
         path: ./
diff --git a/src/PSADTree/Internal/_FormattingInternals.cs b/src/PSADTree/Internal/_FormattingInternals.cs
index 75af3b5..9a11246 100644
--- a/src/PSADTree/Internal/_FormattingInternals.cs
+++ b/src/PSADTree/Internal/_FormattingInternals.cs
@@ -9,7 +9,7 @@ namespace PSADTree.Internal;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static class _FormattingInternals
 {
-    private static Regex s_getDomain = new(
+    private static readonly Regex s_getDomain = new(
         @"^DC=|(?<!\\),.+",
         RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
diff --git a/src/PSADTree/Internal/_SecurityDescriptorInternals.cs b/src/PSADTree/Internal/_SecurityDescriptorInternals.cs
index b10a3a5..5b8393e 100644
--- a/src/PSADTree/Internal/_SecurityDescriptorInternals.cs
+++ b/src/PSADTree/Internal/_SecurityDescriptorInternals.cs
@@ -14,37 +14,42 @@ namespace PSADTree.Internal;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static class _SecurityDescriptorInternals
 {
-    private readonly static Type _target = typeof(NTAccount);
-    private static readonly MethodInfo _getOwner;
-    private static readonly MethodInfo _getGroup;
-    private static readonly MethodInfo _getSddlForm;
-    private static readonly MethodInfo _getAccessRules;
-    private static readonly MethodInfo _getAccessToString;
+    private readonly static Type s_target = typeof(NTAccount);
+    private static readonly MethodInfo s_getOwner;
+    private static readonly MethodInfo s_getGroup;
+    private static readonly MethodInfo s_getSddlForm;
+    private static readonly MethodInfo s_getAccessRules;
+    private static readonly MethodInfo s_getAccessToString;
 
     static _SecurityDescriptorInternals()
     {
         Type type = typeof(_SecurityDescriptorInternals);
-        _getOwner = type.GetMethod(nameof(GetOwner))!;
-        _getGroup = type.GetMethod(nameof(GetGroup))!;
-        _getSddlForm = type.GetMethod(nameof(GetSddlForm))!;
-        _getAccessRules = type.GetMethod(nameof(GetAccessRules))!;
-        _getAccessToString = type.GetMethod(nameof(GetAccessToString))!;
+        s_getOwner = GetMethod(type, nameof(GetOwner));
+        s_getGroup = GetMethod(type, nameof(GetGroup));
+        s_getSddlForm = GetMethod(type, nameof(GetSddlForm));
+        s_getAccessRules = GetMethod(type, nameof(GetAccessRules));
+        s_getAccessToString = GetMethod(type, nameof(GetAccessToString));
     }
 
+    private static MethodInfo GetMethod(Type type, string name) =>
+        type.GetMethod(name)
+            ?? throw new InvalidOperationException(
+                $"Method '{name}' not found on type '{type.FullName}'.");
+
     private static ActiveDirectorySecurity GetBaseObject(PSObject target)
         => (ActiveDirectorySecurity)target.BaseObject;
 
     public static IdentityReference? GetOwner(PSObject target)
-        => GetBaseObject(target).GetOwner(_target);
+        => GetBaseObject(target).GetOwner(s_target);
 
     public static IdentityReference? GetGroup(PSObject target)
-        => GetBaseObject(target).GetGroup(_target);
+        => GetBaseObject(target).GetGroup(s_target);
 
     public static string GetSddlForm(PSObject target)
         => GetBaseObject(target).GetSecurityDescriptorSddlForm(AccessControlSections.All);
 
     public static AuthorizationRuleCollection GetAccessRules(PSObject target)
-        => GetBaseObject(target).GetAccessRules(true, true, _target);
+        => GetBaseObject(target).GetAccessRules(true, true, s_target);
 
     public static string GetAccessToString(PSObject target)
     {
@@ -56,13 +61,14 @@ public static string GetAccessToString(PSObject target)
     }
 
     internal static PSObject GetSecurityDescriptorAsPSObject(this DirectoryEntry entry)
-        => PSObject.AsPSObject(entry.ObjectSecurity)
-                .AddProperty("Path", entry.Path)
-                .AddCodeProperty("Owner", _getOwner)
-                .AddCodeProperty("Group", _getGroup)
-                .AddCodeProperty("Sddl", _getSddlForm)
-                .AddCodeProperty("Access", _getAccessRules)
-                .AddCodeProperty("AccessToString", _getAccessToString);
+        => PSObject
+            .AsPSObject(entry.ObjectSecurity)
+            .AddProperty("Path", entry.Path)
+            .AddCodeProperty("Owner", s_getOwner)
+            .AddCodeProperty("Group", s_getGroup)
+            .AddCodeProperty("Sddl", s_getSddlForm)
+            .AddCodeProperty("Access", s_getAccessRules)
+            .AddCodeProperty("AccessToString", s_getAccessToString);
 
     private static PSObject AddProperty(
         this PSObject psObject,
diff --git a/tools/InvokeBuild.ps1 b/tools/InvokeBuild.ps1
index 4ece54d..daed5ee 100644
--- a/tools/InvokeBuild.ps1
+++ b/tools/InvokeBuild.ps1
@@ -83,7 +83,10 @@ task PesterTests {
 
     if (-not (dotnet tool list --global | Select-String coverlet.console -SimpleMatch)) {
         Write-Host 'Installing dotnet tool coverlet.console' -ForegroundColor Yellow
-        dotnet tool install --global coverlet.console
+        dotnet @(
+            'tool', 'install'
+            '--global', 'coverlet.console'
+            if (-not $IsCoreCLR) { '--version', '6.0.4' })
     }
 
     coverlet $ProjectInfo.Pester.GetTestArgs($PSVersionTable.PSVersion)