Mark some more recent flaky tests

osu.Game.Rulesets.Osu.Tests/TestSceneSpinnerInput.cs

@@ -22,6 +22,7 @@ using osu.Game.Rulesets.UI;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play;
 using osu.Game.Storyboards;
+using osu.Game.Tests;
 using osu.Game.Tests.Visual;
 using osuTK;
 
@@ -107,6 +108,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         }
 
         [Test]
+        [FlakyTest]
         public void TestVibrateWithoutSpinningOnCentreWithDoubleTime()
         {
             List<ReplayFrame> frames = new List<ReplayFrame>();

osu.Game.Tests/Visual/Gameplay/TestSceneGameplaySamplePlayback.cs

@@ -21,6 +21,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         private bool seek;
 
         [Test]
+        [FlakyTest]
         public void TestAllSamplesStopDuringSeek()
         {
             DrawableSlider? slider = null;

osu.Game.Tests/Visual/Gameplay/TestSceneSkipOverlay.cs

@@ -69,6 +69,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         }
 
         [Test]
+        [FlakyTest]
         public void TestFadeOnIdle()
         {
             createTest();
@@ -144,7 +145,8 @@ namespace osu.Game.Tests.Visual.Gameplay
         }
 
         [Test]
-        public void TestDoesntFadeOnMouseDown()
+        [FlakyTest]
+        public void TestDoesNotFadeOnMouseDown()
         {
             createTest();
 

osu.Game.Tests/Visual/Multiplayer/TestSceneMultiSpectatorScreen.cs

@@ -303,6 +303,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
         }
 
         [Test]
+        [FlakyTest]
         public void TestMostInSyncUserIsAudioSource()
         {
             start(new[] { PLAYER_1_ID, PLAYER_2_ID });