diff --git a/osu.Game.Tests/Mods/ModDifficultyAdjustTest.cs b/osu.Game.Tests/Mods/ModDifficultyAdjustTest.cs
index 84cf796835..fd620a0e95 100644
--- a/osu.Game.Tests/Mods/ModDifficultyAdjustTest.cs
+++ b/osu.Game.Tests/Mods/ModDifficultyAdjustTest.cs
@@ -105,6 +105,9 @@ namespace osu.Game.Tests.Mods
             testMod.ResetSettingsToDefaults();
 
             Assert.That(testMod.DrainRate.Value, Is.Null);
+
+            // ReSharper disable once HeuristicUnreachableCode
+            // see https://youtrack.jetbrains.com/issue/RIDER-70159.
             Assert.That(testMod.OverallDifficulty.Value, Is.Null);
 
             var applied = applyDifficulty(new BeatmapDifficulty