diff --git a/osu.Game.Benchmarks/BenchmarkBeatmapParsing.cs b/osu.Game.Benchmarks/BenchmarkBeatmapParsing.cs
index 07ffda4030bb..1d207d04c7cf 100644
--- a/osu.Game.Benchmarks/BenchmarkBeatmapParsing.cs
+++ b/osu.Game.Benchmarks/BenchmarkBeatmapParsing.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 BenchmarkDotNet.Attributes;
 using osu.Framework.IO.Stores;
diff --git a/osu.Game.Benchmarks/BenchmarkMod.cs b/osu.Game.Benchmarks/BenchmarkMod.cs
index a1d92d9a6713..994300df3663 100644
--- a/osu.Game.Benchmarks/BenchmarkMod.cs
+++ b/osu.Game.Benchmarks/BenchmarkMod.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 BenchmarkDotNet.Attributes;
 using osu.Game.Rulesets.Osu.Mods;
@@ -11,7 +9,7 @@ namespace osu.Game.Benchmarks
 {
     public class BenchmarkMod : BenchmarkTest
     {
-        private OsuModDoubleTime mod;
+        private OsuModDoubleTime mod = null!;
 
         [Params(1, 10, 100)]
         public int Times { get; set; }
diff --git a/osu.Game.Benchmarks/BenchmarkRealmReads.cs b/osu.Game.Benchmarks/BenchmarkRealmReads.cs
index 5ffda6504ece..1df77320d2c4 100644
--- a/osu.Game.Benchmarks/BenchmarkRealmReads.cs
+++ b/osu.Game.Benchmarks/BenchmarkRealmReads.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.Linq;
 using System.Threading;
 using BenchmarkDotNet.Attributes;
@@ -17,9 +15,9 @@ namespace osu.Game.Benchmarks
 {
     public class BenchmarkRealmReads : BenchmarkTest
     {
-        private TemporaryNativeStorage storage;
-        private RealmAccess realm;
-        private UpdateThread updateThread;
+        private TemporaryNativeStorage storage = null!;
+        private RealmAccess realm = null!;
+        private UpdateThread updateThread = null!;
 
         [Params(1, 100, 1000)]
         public int ReadsPerFetch { get; set; }
@@ -135,9 +133,9 @@ public void BenchmarkDetachedPropertyRead()
         [GlobalCleanup]
         public void Cleanup()
         {
-            realm?.Dispose();
-            storage?.Dispose();
-            updateThread?.Exit();
+            realm.Dispose();
+            storage.Dispose();
+            updateThread.Exit();
         }
     }
 }
diff --git a/osu.Game.Benchmarks/BenchmarkRuleset.cs b/osu.Game.Benchmarks/BenchmarkRuleset.cs
index de8cb13773e5..7d318e043b8b 100644
--- a/osu.Game.Benchmarks/BenchmarkRuleset.cs
+++ b/osu.Game.Benchmarks/BenchmarkRuleset.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 BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Engines;
 using osu.Game.Online.API;
@@ -13,9 +11,9 @@ namespace osu.Game.Benchmarks
 {
     public class BenchmarkRuleset : BenchmarkTest
     {
-        private OsuRuleset ruleset;
-        private APIMod apiModDoubleTime;
-        private APIMod apiModDifficultyAdjust;
+        private OsuRuleset ruleset = null!;
+        private APIMod apiModDoubleTime = null!;
+        private APIMod apiModDifficultyAdjust = null!;
 
         public override void SetUp()
         {
diff --git a/osu.Game.Benchmarks/BenchmarkTest.cs b/osu.Game.Benchmarks/BenchmarkTest.cs
index 140696e4a498..34f5edd084a6 100644
--- a/osu.Game.Benchmarks/BenchmarkTest.cs
+++ b/osu.Game.Benchmarks/BenchmarkTest.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 BenchmarkDotNet.Attributes;
 using BenchmarkDotNet.Running;
 using NUnit.Framework;
diff --git a/osu.Game.Benchmarks/Program.cs b/osu.Game.Benchmarks/Program.cs
index 603d8aa1b9d2..439ced53ab4e 100644
--- a/osu.Game.Benchmarks/Program.cs
+++ b/osu.Game.Benchmarks/Program.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 BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Running;