diff --git a/osu.Game.Rulesets.Catch/Mods/CatchModFlashlight.cs b/osu.Game.Rulesets.Catch/Mods/CatchModFlashlight.cs
index abe391ba4e..4824106c55 100644
--- a/osu.Game.Rulesets.Catch/Mods/CatchModFlashlight.cs
+++ b/osu.Game.Rulesets.Catch/Mods/CatchModFlashlight.cs
@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Bindables;
+using osu.Framework.Extensions.ObjectExtensions;
 using osu.Framework.Graphics;
 using osu.Game.Configuration;
 using osu.Game.Rulesets.Catch.Objects;
@@ -35,9 +36,9 @@ namespace osu.Game.Rulesets.Catch.Mods
 
         public override float DefaultFlashlightSize => 350;
 
-        protected override Flashlight CreateFlashlight() => new CatchFlashlight(this, playfield);
+        protected override Flashlight CreateFlashlight() => new CatchFlashlight(this, playfield.AsNonNull());
 
-        private CatchPlayfield playfield = null!;
+        private CatchPlayfield? playfield;
 
         public override void ApplyToDrawableRuleset(DrawableRuleset<CatchHitObject> drawableRuleset)
         {
diff --git a/osu.Game.Rulesets.Catch/Mods/CatchModRelax.cs b/osu.Game.Rulesets.Catch/Mods/CatchModRelax.cs
index 60f1614d98..0ab6da0363 100644
--- a/osu.Game.Rulesets.Catch/Mods/CatchModRelax.cs
+++ b/osu.Game.Rulesets.Catch/Mods/CatchModRelax.cs
@@ -1,6 +1,7 @@
 // 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.
 
+using System.Diagnostics;
 using osu.Framework.Graphics;
 using osu.Framework.Input;
 using osu.Framework.Input.Bindings;
@@ -18,7 +19,7 @@ namespace osu.Game.Rulesets.Catch.Mods
     {
         public override string Description => @"Use the mouse to control the catcher.";
 
-        private DrawableRuleset<CatchHitObject> drawableRuleset = null!;
+        private DrawableRuleset<CatchHitObject>? drawableRuleset;
 
         public void ApplyToDrawableRuleset(DrawableRuleset<CatchHitObject> drawableRuleset)
         {
@@ -27,6 +28,8 @@ namespace osu.Game.Rulesets.Catch.Mods
 
         public void ApplyToPlayer(Player player)
         {
+            Debug.Assert(drawableRuleset != null);
+
             if (!drawableRuleset.HasReplayLoaded.Value)
                 drawableRuleset.Cursor.Add(new MouseInputHelper((CatchPlayfield)drawableRuleset.Playfield));
         }