diff --git a/osu.Game/Online/API/DummyAPIAccess.cs b/osu.Game/Online/API/DummyAPIAccess.cs
index 45a4737c21..01169828b0 100644
--- a/osu.Game/Online/API/DummyAPIAccess.cs
+++ b/osu.Game/Online/API/DummyAPIAccess.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;
 using System.Threading;
 using System.Threading.Tasks;
@@ -45,13 +43,13 @@ public partial class DummyAPIAccess : Component, IAPIProvider
 
         public int APIVersion => int.Parse(DateTime.Now.ToString("yyyyMMdd"));
 
-        public Exception LastLoginError { get; private set; }
+        public Exception? LastLoginError { get; private set; }
 
         /// <summary>
         /// Provide handling logic for an arbitrary API request.
         /// Should return true is a request was handled. If null or false return, the request will be failed with a <see cref="NotSupportedException"/>.
         /// </summary>
-        public Func<APIRequest, bool> HandleRequest;
+        public Func<APIRequest, bool>? HandleRequest;
 
         private readonly Bindable<APIState> state = new Bindable<APIState>(APIState.Online);
 
@@ -128,11 +126,11 @@ public void Logout()
             LocalUser.Value = new GuestUser();
         }
 
-        public IHubClientConnector GetHubConnector(string clientName, string endpoint, bool preferMessagePack) => null;
+        public IHubClientConnector? GetHubConnector(string clientName, string endpoint, bool preferMessagePack) => null;
 
         public NotificationsClientConnector GetNotificationsConnector() => new PollingNotificationsClientConnector(this);
 
-        public RegistrationRequest.RegistrationRequestErrors CreateAccount(string email, string username, string password)
+        public RegistrationRequest.RegistrationRequestErrors? CreateAccount(string email, string username, string password)
         {
             Thread.Sleep(200);
             return null;
diff --git a/osu.Game/Overlays/Login/LoginPanel.cs b/osu.Game/Overlays/Login/LoginPanel.cs
index a84a211dfc..71ecf2e75a 100644
--- a/osu.Game/Overlays/Login/LoginPanel.cs
+++ b/osu.Game/Overlays/Login/LoginPanel.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;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
@@ -26,23 +24,24 @@ namespace osu.Game.Overlays.Login
     public partial class LoginPanel : Container
     {
         private bool bounding = true;
-        private LoginForm form;
+
+        private LoginForm? form;
 
         [Resolved]
-        private OsuColour colours { get; set; }
+        private OsuColour colours { get; set; } = null!;
 
-        private UserGridPanel panel;
-        private UserDropdown dropdown;
+        private UserGridPanel panel = null!;
+        private UserDropdown dropdown = null!;
 
         /// <summary>
         /// Called to request a hide of a parent displaying this container.
         /// </summary>
-        public Action RequestHide;
+        public Action? RequestHide;
 
         private readonly IBindable<APIState> apiState = new Bindable<APIState>();
 
         [Resolved]
-        private IAPIProvider api { get; set; }
+        private IAPIProvider api { get; set; } = null!;
 
         public override RectangleF BoundingBox => bounding ? base.BoundingBox : RectangleF.Empty;
 
diff --git a/osu.Game/Overlays/LoginOverlay.cs b/osu.Game/Overlays/LoginOverlay.cs
index de37aaa291..a575253e71 100644
--- a/osu.Game/Overlays/LoginOverlay.cs
+++ b/osu.Game/Overlays/LoginOverlay.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 osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -18,7 +16,7 @@ namespace osu.Game.Overlays
 {
     public partial class LoginOverlay : OsuFocusedOverlayContainer
     {
-        private LoginPanel panel;
+        private LoginPanel panel = null!;
 
         private const float transition_time = 400;