diff --git a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelector.cs b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelector.cs
index 4002480e7f..85599a5d45 100644
--- a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelector.cs
+++ b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelector.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System.IO;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -20,7 +18,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
 
         private Box hiddenToggleBackground = null!;
 
-        public OsuDirectorySelector(string initialPath = null)
+        public OsuDirectorySelector(string? initialPath = null)
             : base(initialPath)
         {
         }
@@ -68,7 +66,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
 
         protected override DirectorySelectorDirectory CreateParentDirectoryItem(DirectoryInfo directory) => new OsuDirectorySelectorParentDirectory(directory);
 
-        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string displayName = null) => new OsuDirectorySelectorDirectory(directory, displayName);
+        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string? displayName = null) => new OsuDirectorySelectorDirectory(directory, displayName);
 
         protected override void NotifySelectionError() => this.FlashColour(Colour4.Red, 300);
     }
diff --git a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorBreadcrumbDisplay.cs b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorBreadcrumbDisplay.cs
index 5b52663198..e91076498c 100644
--- a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorBreadcrumbDisplay.cs
+++ b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorBreadcrumbDisplay.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System.IO;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -31,7 +29,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
 
         protected override DirectorySelectorDirectory CreateRootDirectoryItem() => new OsuBreadcrumbDisplayComputer();
 
-        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string displayName = null) => new OsuBreadcrumbDisplayDirectory(directory, displayName);
+        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string? displayName = null) => new OsuBreadcrumbDisplayDirectory(directory, displayName);
 
         [BackgroundDependencyLoader]
         private void load(OverlayColourProvider colourProvider)
@@ -62,13 +60,13 @@ namespace osu.Game.Graphics.UserInterfaceV2
 
         private partial class OsuBreadcrumbDisplayDirectory : DirectorySelectorDirectory
         {
-            public OsuBreadcrumbDisplayDirectory(DirectoryInfo directory, string displayName = null)
+            public OsuBreadcrumbDisplayDirectory(DirectoryInfo? directory, string? displayName = null)
                 : base(directory, displayName)
             {
             }
 
             [Resolved]
-            private OverlayColourProvider colourProvider { get; set; }
+            private OverlayColourProvider colourProvider { get; set; } = null!;
 
             [BackgroundDependencyLoader]
             private void load()
diff --git a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorDirectory.cs b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorDirectory.cs
index a1d76dd7e3..a36804658a 100644
--- a/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorDirectory.cs
+++ b/osu.Game/Graphics/UserInterfaceV2/OsuDirectorySelectorDirectory.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System.IO;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -15,7 +13,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
 {
     internal partial class OsuDirectorySelectorDirectory : DirectorySelectorDirectory
     {
-        public OsuDirectorySelectorDirectory(DirectoryInfo directory, string displayName = null)
+        public OsuDirectorySelectorDirectory(DirectoryInfo directory, string? displayName = null)
             : base(directory, displayName)
         {
         }
diff --git a/osu.Game/Graphics/UserInterfaceV2/OsuFileSelector.cs b/osu.Game/Graphics/UserInterfaceV2/OsuFileSelector.cs
index feedeb8ff3..7ce5f63656 100644
--- a/osu.Game/Graphics/UserInterfaceV2/OsuFileSelector.cs
+++ b/osu.Game/Graphics/UserInterfaceV2/OsuFileSelector.cs
@@ -1,8 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-#nullable disable
-
 using System.IO;
 using System.Linq;
 using osu.Framework.Allocation;
@@ -22,7 +20,8 @@ namespace osu.Game.Graphics.UserInterfaceV2
     {
         private Box hiddenToggleBackground = null!;
 
-        public OsuFileSelector(string initialPath = null, string[] validFileExtensions = null)
+        public OsuFileSelector(string? initialPath = null, string[]? validFileExtensions = null)
+            : base(initialPath, validFileExtensions)
         {
         }
 
@@ -69,7 +68,7 @@ namespace osu.Game.Graphics.UserInterfaceV2
 
         protected override DirectorySelectorDirectory CreateParentDirectoryItem(DirectoryInfo directory) => new OsuDirectorySelectorParentDirectory(directory);
 
-        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string displayName = null) => new OsuDirectorySelectorDirectory(directory, displayName);
+        protected override DirectorySelectorDirectory CreateDirectoryItem(DirectoryInfo directory, string? displayName = null) => new OsuDirectorySelectorDirectory(directory, displayName);
 
         protected override DirectoryListingFile CreateFileItem(FileInfo file) => new OsuDirectoryListingFile(file);