diff --git a/osu.Desktop.VisualTests/Tests/TestCaseDetails.cs b/osu.Desktop.VisualTests/Tests/TestCaseDetails.cs
index 0335e80e3a..3bfc0b147b 100644
--- a/osu.Desktop.VisualTests/Tests/TestCaseDetails.cs
+++ b/osu.Desktop.VisualTests/Tests/TestCaseDetails.cs
@@ -7,14 +7,11 @@ using osu.Framework.Testing;
 using osu.Game.Database;
 using osu.Game.Screens.Select;
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace osu.Desktop.VisualTests.Tests
 {
-    class TestCaseDetails : TestCase
+    internal class TestCaseDetails : TestCase
     {
         private Details details;
 
diff --git a/osu.Game/Screens/Select/BeatmapDetailArea.cs b/osu.Game/Screens/Select/BeatmapDetailArea.cs
index 337ad04e7d..355b2958e7 100644
--- a/osu.Game/Screens/Select/BeatmapDetailArea.cs
+++ b/osu.Game/Screens/Select/BeatmapDetailArea.cs
@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
diff --git a/osu.Game/Screens/Select/Details.cs b/osu.Game/Screens/Select/Details.cs
index 9ea474020b..1145e13338 100644
--- a/osu.Game/Screens/Select/Details.cs
+++ b/osu.Game/Screens/Select/Details.cs
@@ -18,22 +18,22 @@ namespace osu.Game.Screens.Select
 {
     public class Details : Container
     {
-        private SpriteText description;
-        private SpriteText source;
-        private FillFlowContainer<SpriteText> tags;
+        private readonly SpriteText description;
+        private readonly SpriteText source;
+        private readonly FillFlowContainer<SpriteText> tags;
 
-        private DifficultyRow circleSize;
-        private DifficultyRow drainRate;
-        private DifficultyRow overallDifficulty;
-        private DifficultyRow approachRate;
-        private DifficultyRow stars;
+        private readonly DifficultyRow circleSize;
+        private readonly DifficultyRow drainRate;
+        private readonly DifficultyRow overallDifficulty;
+        private readonly DifficultyRow approachRate;
+        private readonly DifficultyRow stars;
 
-        private DetailsBar ratingsBar;
-        private SpriteText negativeRatings;
-        private SpriteText positiveRatings;
-        private FillFlowContainer<DetailsBar> ratingsGraph;
+        private readonly DetailsBar ratingsBar;
+        private readonly SpriteText negativeRatings;
+        private readonly SpriteText positiveRatings;
+        private readonly FillFlowContainer<DetailsBar> ratingsGraph;
 
-        private FillFlowContainer<RetryAndFailBar> retryAndFailGraph;
+        private readonly FillFlowContainer<RetryAndFailBar> retryAndFailGraph;
 
         private BeatmapInfo beatmap;
         public BeatmapInfo Beatmap
@@ -390,9 +390,9 @@ namespace osu.Game.Screens.Select
 
         private class DifficultyRow : Container
         {
-            private SpriteText name;
-            private DetailsBar bar;
-            private SpriteText valueText;
+            private readonly SpriteText name;
+            private readonly DetailsBar bar;
+            private readonly SpriteText valueText;
 
             private float difficultyValue;
             public float Value
@@ -485,8 +485,8 @@ namespace osu.Game.Screens.Select
 
         private class RetryAndFailBar : Container<DetailsBar>
         {
-            private DetailsBar retryBar;
-            private DetailsBar failBar;
+            private readonly DetailsBar retryBar;
+            private readonly DetailsBar failBar;
 
             public float RetryLength
             {
diff --git a/osu.Game/Screens/Select/DetailsBar.cs b/osu.Game/Screens/Select/DetailsBar.cs
index b48b618fad..a7193cb822 100644
--- a/osu.Game/Screens/Select/DetailsBar.cs
+++ b/osu.Game/Screens/Select/DetailsBar.cs
@@ -6,14 +6,13 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Colour;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
-using osu.Framework.Graphics.Transforms;
 
 namespace osu.Game.Screens.Select
 {
     public class DetailsBar : Container
     {
-        private Box background;
-        private Box bar;
+        private readonly Box background;
+        private readonly Box bar;
 
         private const int resize_duration = 250;