diff --git a/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs b/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs
index d18b88761d..f7fdd447d6 100644
--- a/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.cs
+++ b/osu.Game.Rulesets.Taiko/Mods/TaikoModClassic.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.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Rulesets.Taiko.UI;
@@ -10,7 +11,7 @@ namespace osu.Game.Rulesets.Taiko.Mods
 {
     public class TaikoModClassic : ModClassic, IApplicableToDrawableRuleset<TaikoHitObject>, IUpdatableByPlayfield
     {
-        private DrawableTaikoRuleset drawableTaikoRuleset;
+        private DrawableTaikoRuleset? drawableTaikoRuleset;
 
         public void ApplyToDrawableRuleset(DrawableRuleset<TaikoHitObject> drawableRuleset)
         {
@@ -23,6 +24,8 @@ namespace osu.Game.Rulesets.Taiko.Mods
 
         public void Update(Playfield playfield)
         {
+            Debug.Assert(drawableTaikoRuleset != null);
+
             // Classic taiko scrolls at a constant 100px per 1000ms. More notes become visible as the playfield is lengthened.
             const float scroll_rate = 10;
 
diff --git a/osu.Game.Rulesets.Taiko/Mods/TaikoModFlashlight.cs b/osu.Game.Rulesets.Taiko/Mods/TaikoModFlashlight.cs
index 43230bc035..3820e55e75 100644
--- a/osu.Game.Rulesets.Taiko/Mods/TaikoModFlashlight.cs
+++ b/osu.Game.Rulesets.Taiko/Mods/TaikoModFlashlight.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.Framework.Layout;
 using osu.Game.Configuration;
@@ -36,9 +37,9 @@ namespace osu.Game.Rulesets.Taiko.Mods
 
         public override float DefaultFlashlightSize => 250;
 
-        protected override Flashlight CreateFlashlight() => new TaikoFlashlight(this, playfield);
+        protected override Flashlight CreateFlashlight() => new TaikoFlashlight(this, playfield.AsNonNull());
 
-        private TaikoPlayfield playfield;
+        private TaikoPlayfield? playfield;
 
         public override void ApplyToDrawableRuleset(DrawableRuleset<TaikoHitObject> drawableRuleset)
         {
diff --git a/osu.Game.Rulesets.Taiko/Mods/TaikoModHidden.cs b/osu.Game.Rulesets.Taiko/Mods/TaikoModHidden.cs
index 538d0a9d7a..dab2279351 100644
--- a/osu.Game.Rulesets.Taiko/Mods/TaikoModHidden.cs
+++ b/osu.Game.Rulesets.Taiko/Mods/TaikoModHidden.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.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
@@ -30,7 +31,7 @@ namespace osu.Game.Rulesets.Taiko.Mods
         /// </summary>
         private const float fade_out_duration = 0.375f;
 
-        private DrawableTaikoRuleset drawableRuleset;
+        private DrawableTaikoRuleset? drawableRuleset;
 
         public void ApplyToDrawableRuleset(DrawableRuleset<TaikoHitObject> drawableRuleset)
         {
@@ -44,6 +45,8 @@ namespace osu.Game.Rulesets.Taiko.Mods
 
         protected override void ApplyNormalVisibilityState(DrawableHitObject hitObject, ArmedState state)
         {
+            Debug.Assert(drawableRuleset != null);
+
             switch (hitObject)
             {
                 case DrawableDrumRollTick: