Fixed: Actually refresh media covers

src/NzbDrone.Core.Test/MusicTests/RefreshArtistServiceFixture.cs

@@ -106,6 +106,7 @@ namespace NzbDrone.Core.Test.MusicTests
             Subject.Execute(new RefreshArtistCommand(_artist.Id));
 
             VerifyEventNotPublished<ArtistUpdatedEvent>();
+            VerifyEventPublished<ArtistRefreshCompleteEvent>();
         }
 
         [Test]
@@ -125,6 +126,7 @@ namespace NzbDrone.Core.Test.MusicTests
             Subject.Execute(new RefreshArtistCommand(_artist.Id));
 
             VerifyEventPublished<ArtistUpdatedEvent>();
+            VerifyEventPublished<ArtistRefreshCompleteEvent>();
         }
 
         [Test]

src/NzbDrone.Core/Music/RefreshArtistService.cs

@@ -245,7 +245,7 @@ namespace NzbDrone.Core.Music
             _eventAggregator.PublishEvent(new ArtistUpdatedEvent(entity));
         }
 
-        protected virtual void PublishRefreshCompleteEvent(Artist entity)
+        protected override void PublishRefreshCompleteEvent(Artist entity)
         {
             _eventAggregator.PublishEvent(new ArtistRefreshCompleteEvent(entity));
         }