diff --git a/src/NzbDrone.Common.Test/Http/HttpClientFixture.cs b/src/NzbDrone.Common.Test/Http/HttpClientFixture.cs
index de37f5ec1..e41cbb2c7 100644
--- a/src/NzbDrone.Common.Test/Http/HttpClientFixture.cs
+++ b/src/NzbDrone.Common.Test/Http/HttpClientFixture.cs
@@ -46,7 +46,7 @@ namespace NzbDrone.Common.Test.Http
 
             TestLogger.Info($"{candidates.Length} TestSites available.");
 
-            _httpBinSleep = _httpBinHosts.Count() < 2 ? 100 : 10;
+            _httpBinSleep = _httpBinHosts.Length < 2 ? 100 : 10;
         }
 
         private bool IsTestSiteAvailable(string site)
@@ -100,7 +100,7 @@ namespace NzbDrone.Common.Test.Http
             Mocker.SetConstant<ICacheManager>(Mocker.Resolve<CacheManager>());
             Mocker.SetConstant<ICreateManagedWebProxy>(Mocker.Resolve<ManagedWebProxyFactory>());
             Mocker.SetConstant<IRateLimitService>(Mocker.Resolve<RateLimitService>());
-            Mocker.SetConstant<IEnumerable<IHttpRequestInterceptor>>(new IHttpRequestInterceptor[0]);
+            Mocker.SetConstant<IEnumerable<IHttpRequestInterceptor>>(Array.Empty<IHttpRequestInterceptor>());
             Mocker.SetConstant<IHttpDispatcher>(Mocker.Resolve<TDispatcher>());
 
             // Used for manual testing of socks proxies.
@@ -193,31 +193,21 @@ namespace NzbDrone.Common.Test.Http
         [Test]
         public void should_not_throw_on_suppressed_status_codes()
         {
-            var request = new HttpRequest($"http://{_httpBinHost}/status/{HttpStatusCode.NotFound}");
+            var request = new HttpRequest($"https://{_httpBinHost}/status/{HttpStatusCode.NotFound}");
             request.SuppressHttpErrorStatusCodes = new[] { HttpStatusCode.NotFound };
 
-            var exception = Assert.Throws<HttpException>(() => Subject.Get<HttpBinResource>(request));
+            Assert.Throws<HttpException>(() => Subject.Get<HttpBinResource>(request));
 
             ExceptionVerification.IgnoreWarns();
         }
 
-        [Test]
-        public void should_log_unsuccessful_status_codes()
-        {
-            var request = new HttpRequest($"http://{_httpBinHost}/status/{HttpStatusCode.NotFound}");
-
-            var exception = Assert.Throws<HttpException>(() => Subject.Get<HttpBinResource>(request));
-
-            ExceptionVerification.ExpectedWarns(1);
-        }
-
         [Test]
         public void should_not_log_unsuccessful_status_codes()
         {
-            var request = new HttpRequest($"http://{_httpBinHost}/status/{HttpStatusCode.NotFound}");
+            var request = new HttpRequest($"https://{_httpBinHost}/status/{HttpStatusCode.NotFound}");
             request.LogHttpError = false;
 
-            var exception = Assert.Throws<HttpException>(() => Subject.Get<HttpBinResource>(request));
+            Assert.Throws<HttpException>(() => Subject.Get<HttpBinResource>(request));
 
             ExceptionVerification.ExpectedWarns(0);
         }
diff --git a/src/NzbDrone.Core.Test/ImportListTests/ImportListSyncServiceFixture.cs b/src/NzbDrone.Core.Test/ImportListTests/ImportListSyncServiceFixture.cs
index 2f4030901..285623b34 100644
--- a/src/NzbDrone.Core.Test/ImportListTests/ImportListSyncServiceFixture.cs
+++ b/src/NzbDrone.Core.Test/ImportListTests/ImportListSyncServiceFixture.cs
@@ -50,12 +50,12 @@ namespace NzbDrone.Core.Test.ImportListTests
                 .Returns(new List<ImportListExclusion>());
 
             Mocker.GetMock<IAddArtistService>()
-                .Setup(v => v.AddArtists(It.IsAny<List<Artist>>(), false))
-                .Returns((List<Artist> artists, bool doRefresh) => artists);
+                .Setup(v => v.AddArtists(It.IsAny<List<Artist>>(), false, true))
+                .Returns((List<Artist> artists, bool doRefresh, bool ignoreErrors) => artists);
 
             Mocker.GetMock<IAddAlbumService>()
-                .Setup(v => v.AddAlbums(It.IsAny<List<Album>>(), false))
-                .Returns((List<Album> albums, bool doRefresh) => albums);
+                .Setup(v => v.AddAlbums(It.IsAny<List<Album>>(), false, true))
+                .Returns((List<Album> albums, bool doRefresh, bool ignoreErrors) => albums);
         }
 
         private void WithAlbum()
@@ -184,7 +184,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddArtistService>()
-                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false));
+                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false, It.IsAny<bool>()));
         }
 
         [Test]
@@ -196,7 +196,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddArtistService>()
-                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false));
+                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false, It.IsAny<bool>()));
         }
 
         [Test]
@@ -208,7 +208,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddAlbumService>()
-                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 1), false));
+                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 1), false, It.IsAny<bool>()));
         }
 
         [TestCase(ImportListMonitorType.None, false)]
@@ -222,7 +222,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddArtistService>()
-                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 1 && t.First().Monitored == expectedArtistMonitored), false));
+                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 1 && t.First().Monitored == expectedArtistMonitored), false, It.IsAny<bool>()));
         }
 
         [TestCase(ImportListMonitorType.None, false)]
@@ -236,7 +236,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddAlbumService>()
-                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 1 && t.First().Monitored == expectedAlbumMonitored), false));
+                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 1 && t.First().Monitored == expectedAlbumMonitored), false, It.IsAny<bool>()));
         }
 
         [Test]
@@ -248,7 +248,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddArtistService>()
-                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false));
+                .Verify(v => v.AddArtists(It.Is<List<Artist>>(t => t.Count == 0), false, It.IsAny<bool>()));
         }
 
         [Test]
@@ -260,7 +260,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddAlbumService>()
-                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 0), false));
+                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 0), false, It.IsAny<bool>()));
         }
 
         [Test]
@@ -273,7 +273,7 @@ namespace NzbDrone.Core.Test.ImportListTests
             Subject.Execute(new ImportListSyncCommand());
 
             Mocker.GetMock<IAddAlbumService>()
-                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 0), false));
+                .Verify(v => v.AddAlbums(It.Is<List<Album>>(t => t.Count == 0), false, It.IsAny<bool>()));
         }
     }
 }
diff --git a/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs b/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
index f115e74af..0a99a2195 100644
--- a/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
+++ b/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
@@ -117,8 +117,8 @@ namespace NzbDrone.Core.ImportLists
                 }
             }
 
-            var addedArtists = _addArtistService.AddArtists(artistsToAdd, false);
-            var addedAlbums = _addAlbumService.AddAlbums(albumsToAdd, false);
+            var addedArtists = _addArtistService.AddArtists(artistsToAdd, false, true);
+            var addedAlbums = _addAlbumService.AddAlbums(albumsToAdd, false, true);
 
             var message = string.Format($"Import List Sync Completed. Items found: {reports.Count}, Artists added: {addedArtists.Count}, Albums added: {addedAlbums.Count}");
 
diff --git a/src/NzbDrone.Core/Music/Services/AddAlbumService.cs b/src/NzbDrone.Core/Music/Services/AddAlbumService.cs
index 08a673bd7..1f1bb1071 100644
--- a/src/NzbDrone.Core/Music/Services/AddAlbumService.cs
+++ b/src/NzbDrone.Core/Music/Services/AddAlbumService.cs
@@ -13,7 +13,7 @@ namespace NzbDrone.Core.Music
     public interface IAddAlbumService
     {
         Album AddAlbum(Album album, bool doRefresh = true);
-        List<Album> AddAlbums(List<Album> albums, bool doRefresh = true);
+        List<Album> AddAlbums(List<Album> albums, bool doRefresh = true, bool ignoreErrors = false);
     }
 
     public class AddAlbumService : IAddAlbumService
@@ -77,15 +77,33 @@ namespace NzbDrone.Core.Music
             return album;
         }
 
-        public List<Album> AddAlbums(List<Album> albums, bool doRefresh = true)
+        public List<Album> AddAlbums(List<Album> albums, bool doRefresh = true, bool ignoreErrors = false)
         {
             var added = DateTime.UtcNow;
             var addedAlbums = new List<Album>();
 
             foreach (var a in albums)
             {
-                a.Added = added;
-                addedAlbums.Add(AddAlbum(a, doRefresh));
+                try
+                {
+                    a.Added = added;
+                    if (addedAlbums.Any(f => f.ForeignAlbumId == a.ForeignAlbumId))
+                    {
+                        _logger.Debug("Musicbrainz ID {0} was not added due to validation failure: Album already exists on list", a.ForeignAlbumId);
+                        continue;
+                    }
+
+                    addedAlbums.Add(AddAlbum(a, doRefresh));
+                }
+                catch (ValidationException ex)
+                {
+                    if (!ignoreErrors)
+                    {
+                        throw;
+                    }
+
+                    _logger.Debug("Musicbrainz ID {0} was not added due to validation failures. {1}", a.ForeignAlbumId, ex.Message);
+                }
             }
 
             return addedAlbums;
diff --git a/src/NzbDrone.Core/Music/Services/AddArtistService.cs b/src/NzbDrone.Core/Music/Services/AddArtistService.cs
index 2abf43199..ef135d68b 100644
--- a/src/NzbDrone.Core/Music/Services/AddArtistService.cs
+++ b/src/NzbDrone.Core/Music/Services/AddArtistService.cs
@@ -17,7 +17,7 @@ namespace NzbDrone.Core.Music
     public interface IAddArtistService
     {
         Artist AddArtist(Artist newArtist, bool doRefresh = true);
-        List<Artist> AddArtists(List<Artist> newArtists, bool doRefresh = true);
+        List<Artist> AddArtists(List<Artist> newArtists, bool doRefresh = true, bool ignoreErrors = false);
     }
 
     public class AddArtistService : IAddArtistService
@@ -63,7 +63,7 @@ namespace NzbDrone.Core.Music
             return newArtist;
         }
 
-        public List<Artist> AddArtists(List<Artist> newArtists, bool doRefresh = true)
+        public List<Artist> AddArtists(List<Artist> newArtists, bool doRefresh = true, bool ignoreErrors = false)
         {
             var added = DateTime.UtcNow;
             var artistsToAdd = new List<Artist>();
@@ -75,12 +75,23 @@ namespace NzbDrone.Core.Music
                     var artist = AddSkyhookData(s);
                     artist = SetPropertiesAndValidate(artist);
                     artist.Added = added;
+                    if (artistsToAdd.Any(f => f.ForeignArtistId == artist.ForeignArtistId))
+                    {
+                        _logger.Debug("Musicbrainz ID {0} was not added due to validation failure: Artist already exists on list", s.ForeignArtistId);
+                        continue;
+                    }
+
                     artistsToAdd.Add(artist);
                 }
-                catch (Exception ex)
+                catch (ValidationException ex)
                 {
+                    if (!ignoreErrors)
+                    {
+                        throw;
+                    }
+
                     // Catch Import Errors for now until we get things fixed up
-                    _logger.Error(ex, "Failed to import id: {0} - {1}", s.Metadata.Value.ForeignArtistId, s.Metadata.Value.Name);
+                    _logger.Debug(ex, "Failed to import id: {0} - {1}", s.Metadata.Value.ForeignArtistId, s.Metadata.Value.Name);
                 }
             }