Fix PLaylistsResultsScreen tests falling over due to missing beatmap

osu.Game.Tests/Visual/Playlists/TestScenePlaylistsResultsScreen.cs

@@ -44,6 +44,10 @@ namespace osu.Game.Tests.Visual.Playlists
             requestComplete = false;
             totalCount = 0;
             bindHandler();
+
+            // beatmap is required to be an actual beatmap so the scores can get their scores correctly calculated for standardised scoring.
+            // else the tests that rely on ordering will fall over.
+            Beatmap.Value = CreateWorkingBeatmap(Ruleset.Value);
         });
 
         [Test]