diff --git a/benchmarks/Benchmarks/packages.lock.json b/benchmarks/Benchmarks/packages.lock.json
index 08614b0e273..0c67ba90ca1 100644
--- a/benchmarks/Benchmarks/packages.lock.json
+++ b/benchmarks/Benchmarks/packages.lock.json
@@ -67,8 +67,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -1195,7 +1195,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     }
diff --git a/benchmarks/Profiling/packages.lock.json b/benchmarks/Profiling/packages.lock.json
index f1ff9c7aec7..4fbb49c50f4 100644
--- a/benchmarks/Profiling/packages.lock.json
+++ b/benchmarks/Profiling/packages.lock.json
@@ -31,8 +31,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -131,7 +131,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     }
diff --git a/src/Elastic.Clients.Elasticsearch.JsonNetSerializer/packages.lock.json b/src/Elastic.Clients.Elasticsearch.JsonNetSerializer/packages.lock.json
index abd3d524cd2..880da78d98b 100644
--- a/src/Elastic.Clients.Elasticsearch.JsonNetSerializer/packages.lock.json
+++ b/src/Elastic.Clients.Elasticsearch.JsonNetSerializer/packages.lock.json
@@ -37,8 +37,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -143,7 +143,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     },
@@ -183,8 +183,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -332,7 +332,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     },
@@ -381,8 +381,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -529,7 +529,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     },
@@ -569,8 +569,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -709,7 +709,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     },
@@ -749,8 +749,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -849,7 +849,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     },
@@ -889,8 +889,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -989,7 +989,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       }
     }
diff --git a/src/Elastic.Clients.Elasticsearch/Api/BulkResponse.cs b/src/Elastic.Clients.Elasticsearch/Api/BulkResponse.cs
index f38c477ee5c..10780cbce97 100644
--- a/src/Elastic.Clients.Elasticsearch/Api/BulkResponse.cs
+++ b/src/Elastic.Clients.Elasticsearch/Api/BulkResponse.cs
@@ -20,7 +20,7 @@ public partial class BulkResponse
 		? Enumerable.Empty<ResponseItem>()
 		: Items.Where(i => !i.IsValid);
 
-	public override bool IsValid => base.IsValid && !Errors && !ItemsWithErrors.HasAny();
+	public override bool IsValidResponse => base.IsValidResponse && !Errors && !ItemsWithErrors.HasAny();
 
 	protected override void DebugIsValid(StringBuilder sb)
 	{
diff --git a/src/Elastic.Clients.Elasticsearch/Client/ElasticsearchResponseBaseExtensions.cs b/src/Elastic.Clients.Elasticsearch/Client/ElasticsearchResponseBaseExtensions.cs
index 086d28e4fbb..a5335125c42 100644
--- a/src/Elastic.Clients.Elasticsearch/Client/ElasticsearchResponseBaseExtensions.cs
+++ b/src/Elastic.Clients.Elasticsearch/Client/ElasticsearchResponseBaseExtensions.cs
@@ -8,5 +8,5 @@ namespace Elastic.Clients.Elasticsearch;
 
 public static class ElasticsearchResponseExtensions
 {
-	public static bool IsSuccess(this ElasticsearchResponse response) => response.ApiCallDetails is not null && response.ApiCallDetails.Success;
+	public static bool IsSuccess(this ElasticsearchResponse response) => response.ApiCallDetails is not null && response.ApiCallDetails.HasSuccessfulStatusCode;
 }
diff --git a/src/Elastic.Clients.Elasticsearch/Core/ElasticsearchClientProductRegistration.cs b/src/Elastic.Clients.Elasticsearch/Core/ElasticsearchClientProductRegistration.cs
index 419a1a1943d..3f00d9bb255 100644
--- a/src/Elastic.Clients.Elasticsearch/Core/ElasticsearchClientProductRegistration.cs
+++ b/src/Elastic.Clients.Elasticsearch/Core/ElasticsearchClientProductRegistration.cs
@@ -16,7 +16,7 @@ public ElasticsearchClientProductRegistration(Type markerType) : base(markerType
 	public static ElasticsearchClientProductRegistration DefaultForElasticsearchClientsElasticsearch { get; } = new(typeof(ElasticsearchClient));
 
 	/// <summary>
-	///     Elastic.Clients.Elasticsearch handles 404 in its <see cref="ElasticsearchResponse.IsValid" />, we do not want the low level client throwing
+	///     Elastic.Clients.Elasticsearch handles 404 in its <see cref="ElasticsearchResponse.IsValidResponse" />, we do not want the low level client throwing
 	///     exceptions
 	///     when <see cref="ITransportConfiguration.ThrowExceptions" /> is enabled for 404's. The client is in charge of
 	///     composing paths
@@ -33,7 +33,7 @@ public override bool TryGetServerErrorReason<TResponse>(TResponse response, [Not
 	{
 		if (response is not ElasticsearchResponse r)
 			return base.TryGetServerErrorReason(response, out reason);
-		reason = r.ServerError?.Error?.ToString();
+		reason = r.ElasticsearchServerError?.Error?.ToString();
 		return !string.IsNullOrEmpty(reason);
 	}
 }
diff --git a/src/Elastic.Clients.Elasticsearch/Elastic.Clients.Elasticsearch.csproj b/src/Elastic.Clients.Elasticsearch/Elastic.Clients.Elasticsearch.csproj
index 7d00cdd7682..e2c7bb63457 100644
--- a/src/Elastic.Clients.Elasticsearch/Elastic.Clients.Elasticsearch.csproj
+++ b/src/Elastic.Clients.Elasticsearch/Elastic.Clients.Elasticsearch.csproj
@@ -17,7 +17,7 @@
     <Nullable>annotations</Nullable>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Elastic.Transport" Version="0.4.0" />
+    <PackageReference Include="Elastic.Transport" Version="0.4.2" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.3.44">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
diff --git a/src/Elastic.Clients.Elasticsearch/Helpers/BulkAllObservable.cs b/src/Elastic.Clients.Elasticsearch/Helpers/BulkAllObservable.cs
index ee97e517a3e..ead1f141e40 100644
--- a/src/Elastic.Clients.Elasticsearch/Helpers/BulkAllObservable.cs
+++ b/src/Elastic.Clients.Elasticsearch/Helpers/BulkAllObservable.cs
@@ -109,7 +109,7 @@ private void RefreshOnCompleted()
 
         var refresh = _client.Indices.Refresh(request);
 
-        if (!refresh.IsValid)
+        if (!refresh.IsValidResponse)
             throw Throw($"Refreshing after all documents have indexed failed", refresh);
     }
 
@@ -155,7 +155,7 @@ private async Task<BulkAllResponse> BulkAsync(IList<T> buffer, long page, int ba
         _compositeCancelToken.ThrowIfCancellationRequested();
         _bulkResponseCallback?.Invoke(response);
 
-        if (!response.ApiCallDetails.Success)
+        if (!response.ApiCallDetails.HasSuccessfulStatusCode)
             return await HandleBulkRequestAsync(buffer, page, backOffRetries, response).ConfigureAwait(false);
 
         var retryableDocuments = new List<T>();
diff --git a/src/Elastic.Clients.Elasticsearch/Types/Documents/MultiSearch/MultiSearchRequest.cs b/src/Elastic.Clients.Elasticsearch/Types/Documents/MultiSearch/MultiSearchRequest.cs
index fe259c73dfa..c7fc45a28af 100644
--- a/src/Elastic.Clients.Elasticsearch/Types/Documents/MultiSearch/MultiSearchRequest.cs
+++ b/src/Elastic.Clients.Elasticsearch/Types/Documents/MultiSearch/MultiSearchRequest.cs
@@ -9,7 +9,7 @@ namespace Elastic.Clients.Elasticsearch;
 
 public partial class MultiSearchResponse<TDocument>
 {
-	public override bool IsValid => base.IsValid && (Responses?.All(b => b.Item1 is not null && b.Item1.Status == 200) ?? true);
+	public override bool IsValidResponse => base.IsValidResponse && (Responses?.All(b => b.Item1 is not null && b.Item1.Status == 200) ?? true);
 
 	[JsonIgnore]
 	public int TotalResponses => Responses.HasAny() ? Responses.Count() : 0;
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsResponse.g.cs
index a081e54bc9c..9f843fb3fc3 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch;
 public sealed partial class ExistsResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsSourceResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsSourceResponse.g.cs
index 8a9137e3d9e..ecb3adc2150 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsSourceResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/ExistsSourceResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch;
 public sealed partial class ExistsSourceResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsAliasResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsAliasResponse.g.cs
index 9e2e9f06f21..a6020683fd7 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsAliasResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsAliasResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch.IndexManagement;
 public sealed partial class ExistsAliasResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsIndexTemplateResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsIndexTemplateResponse.g.cs
index 7adb14b71a3..bae7521a765 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsIndexTemplateResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsIndexTemplateResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch.IndexManagement;
 public sealed partial class ExistsIndexTemplateResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsResponse.g.cs
index feb94704c52..a5a6be3eca9 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch.IndexManagement;
 public sealed partial class ExistsResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsTemplateResponse.g.cs b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsTemplateResponse.g.cs
index 4f0d0cd1141..881d6d12abe 100644
--- a/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsTemplateResponse.g.cs
+++ b/src/Elastic.Clients.Elasticsearch/_Generated/Api/IndexManagement/ExistsTemplateResponse.g.cs
@@ -25,5 +25,5 @@
 namespace Elastic.Clients.Elasticsearch.IndexManagement;
 public sealed partial class ExistsTemplateResponse : ElasticsearchResponse
 {
-	public bool Exists => ApiCallDetails is { Success: true, HttpStatusCode: 200 };
+	public bool Exists => ApiCallDetails is { HasSuccessfulStatusCode: true, HttpStatusCode: 200 };
 }
\ No newline at end of file
diff --git a/src/Elastic.Clients.Elasticsearch/packages.lock.json b/src/Elastic.Clients.Elasticsearch/packages.lock.json
index fa098c0cfc2..4712eae0189 100644
--- a/src/Elastic.Clients.Elasticsearch/packages.lock.json
+++ b/src/Elastic.Clients.Elasticsearch/packages.lock.json
@@ -22,9 +22,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -163,9 +163,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -347,9 +347,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -539,9 +539,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -714,9 +714,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -849,9 +849,9 @@
       },
       "Elastic.Transport": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
diff --git a/src/Playground/Program.cs b/src/Playground/Program.cs
index 459601d81fc..fb8242e58e1 100644
--- a/src/Playground/Program.cs
+++ b/src/Playground/Program.cs
@@ -8,17 +8,21 @@
 using Elastic.Transport;
 using Moq;
 using Playground;
-using CreateResponse = Elastic.Clients.Elasticsearch.IndexManagement.CreateResponse;
+using CreateIndexResponse = Elastic.Clients.Elasticsearch.IndexManagement.CreateResponse;
 
 // const string IndexName = "stock-demo-v1";
 
-var mockedResponse = ResponseFactory.CreateResponse(new CreateResponse { Acknowledged = true, Index = "testing", ShardsAcknowledged = true }, 200);
+var createResponse = new CreateIndexResponse { Acknowledged = true, Index = "testing", ShardsAcknowledged = true };
+var mockedResponse = TestableResponseFactory.CreateSuccessfulResponse(createResponse, 201);
 
 var mockedClient = Mock.Of<ElasticsearchClient>(e =>
 	e.Indices.Create<It.IsAnyType>() == mockedResponse);
 
 var testResponse = mockedClient.Indices.Create<Person>();
 
+if (testResponse.IsValidResponse)
+	Console.WriteLine("SUCCESS");
+
 // ALTERNATIVE
 
 var stubbedClient = new TestableElasticsearchClient();
@@ -291,6 +295,6 @@ public class TestableElasticsearchClient : ElasticsearchClient
 
 public class TestIndicesNamespace : IndicesNamespacedClient
 {
-	public override CreateResponse Create<TDocument>() =>
-		ResponseFactory.CreateResponse(new CreateResponse { Acknowledged = true, Index = "testing", ShardsAcknowledged = true }, 200);
+	public override CreateIndexResponse Create<TDocument>() =>
+		TestableResponseFactory.CreateSuccessfulResponse(new CreateIndexResponse { Acknowledged = true, Index = "testing", ShardsAcknowledged = true }, 201);
 }
diff --git a/src/Playground/packages.lock.json b/src/Playground/packages.lock.json
index ef2f67930ff..c56f0612e5e 100644
--- a/src/Playground/packages.lock.json
+++ b/src/Playground/packages.lock.json
@@ -48,8 +48,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -153,7 +153,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {
diff --git a/tests/Tests.ClusterLauncher/packages.lock.json b/tests/Tests.ClusterLauncher/packages.lock.json
index 342f570ef1b..a35874d5be4 100644
--- a/tests/Tests.ClusterLauncher/packages.lock.json
+++ b/tests/Tests.ClusterLauncher/packages.lock.json
@@ -75,8 +75,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -1271,7 +1271,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {
@@ -1388,8 +1388,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -2588,7 +2588,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {
@@ -2705,8 +2705,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -3905,7 +3905,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {
diff --git a/tests/Tests.Core/Extensions/ShouldExtensions.cs b/tests/Tests.Core/Extensions/ShouldExtensions.cs
index cb04c1ee1e3..98d58d693a2 100644
--- a/tests/Tests.Core/Extensions/ShouldExtensions.cs
+++ b/tests/Tests.Core/Extensions/ShouldExtensions.cs
@@ -13,20 +13,19 @@ namespace Tests.Core.Extensions
 	public static class ShouldExtensions
 	{
 		public static void ShouldHaveExpectedIsValid(this ElasticsearchResponse response, bool expectedIsValid) =>
-			response.IsValid.Should().Be(expectedIsValid, "{0}", response.DebugInformation);
+			response.IsValidResponse.Should().Be(expectedIsValid, "{0}", response.DebugInformation);
 
 		public static void ShouldBeValid(this ElasticsearchResponse response) =>
-			response.IsValid.Should().BeTrue("{0}", response.DebugInformation);
+			response.IsValidResponse.Should().BeTrue("{0}", response.DebugInformation);
 
 		public static void ShouldBeValid(this ElasticsearchResponse response, string message) =>
-			response.IsValid.Should().BeTrue("{1} {0}", response.DebugInformation, message);
+			response.IsValidResponse.Should().BeTrue("{1} {0}", response.DebugInformation, message);
 
 		public static void ShouldNotBeValid(this ElasticsearchResponse response) =>
-			response.IsValid.Should().BeFalse("{0}", response.DebugInformation);
+			response.IsValidResponse.Should().BeFalse("{0}", response.DebugInformation);
 
 		public static void ShouldBeSuccess(this ElasticsearchResponse response) =>
-			response.ApiCallDetails.Success.Should().BeTrue("{0}", response.DebugInformation);
-
+			response.ApiCallDetails.HasSuccessfulStatusCode.Should().BeTrue("{0}", response.DebugInformation);
 
 		//public static void ShouldAdhereToSourceSerializerWhenSet(this Project project)
 		//{
diff --git a/tests/Tests.Core/packages.lock.json b/tests/Tests.Core/packages.lock.json
index 31c179b7458..ad79494e0aa 100644
--- a/tests/Tests.Core/packages.lock.json
+++ b/tests/Tests.Core/packages.lock.json
@@ -137,8 +137,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -1589,7 +1589,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {
diff --git a/tests/Tests.Domain/packages.lock.json b/tests/Tests.Domain/packages.lock.json
index 8a22962dfad..854d7f49fec 100644
--- a/tests/Tests.Domain/packages.lock.json
+++ b/tests/Tests.Domain/packages.lock.json
@@ -57,8 +57,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -1142,7 +1142,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "tests.configuration": {
diff --git a/tests/Tests/ClientConcepts/Errors/ServerErrorTestsBase.cs b/tests/Tests/ClientConcepts/Errors/ServerErrorTestsBase.cs
index 4c6a874d7ea..1297c9737d4 100644
--- a/tests/Tests/ClientConcepts/Errors/ServerErrorTestsBase.cs
+++ b/tests/Tests/ClientConcepts/Errors/ServerErrorTestsBase.cs
@@ -32,7 +32,7 @@ protected void HighLevelCall()
 		{
 			var response = HighLevelClient.Search<Project>(s => { });
 			response.Should().NotBeNull();
-			var serverError = response.ServerError;
+			var serverError = response.ElasticsearchServerError;
 			serverError.Should().NotBeNull();
 			serverError.Status.Should().Be(response.ApiCallDetails.HttpStatusCode);
 			serverError.Error.Should().NotBeNull();
diff --git a/tests/Tests/Document/Multiple/Bulk/BulkInvalidVersionApiTests.cs b/tests/Tests/Document/Multiple/Bulk/BulkInvalidVersionApiTests.cs
index 724f138db2e..821f67d1d19 100644
--- a/tests/Tests/Document/Multiple/Bulk/BulkInvalidVersionApiTests.cs
+++ b/tests/Tests/Document/Multiple/Bulk/BulkInvalidVersionApiTests.cs
@@ -59,9 +59,9 @@ protected override LazyResponses ClientUsage() => Calls(
 	protected override void ExpectResponse(BulkResponse response)
 	{
 		response.ShouldNotBeValid();
-		response.ServerError.Should().NotBeNull();
-		response.ServerError.Status.Should().Be(400);
-		response.ServerError.Error.Type.Should().Be("illegal_argument_exception");
-		response.ServerError.Error.Reason.Should().StartWith("sequence numbers must be non negative.");
+		response.ElasticsearchServerError.Should().NotBeNull();
+		response.ElasticsearchServerError.Status.Should().Be(400);
+		response.ElasticsearchServerError.Error.Type.Should().Be("illegal_argument_exception");
+		response.ElasticsearchServerError.Error.Reason.Should().StartWith("sequence numbers must be non negative.");
 	}
 }
diff --git a/tests/Tests/Document/Single/Delete/DeleteApiTests.cs b/tests/Tests/Document/Single/Delete/DeleteApiTests.cs
index aaff33c59f2..14b797c0806 100644
--- a/tests/Tests/Document/Single/Delete/DeleteApiTests.cs
+++ b/tests/Tests/Document/Single/Delete/DeleteApiTests.cs
@@ -166,7 +166,7 @@ protected override void ExpectResponse(DeleteResponse response)
 	{
 		response.ShouldNotBeValid();
 		//response.Result.Should().Be(Result.Error); TODO: This doesn't work until a valid default is set
-		response.ServerError.Should().NotBeNull();
-		response.ServerError.Error.Reason.Should().StartWith("no such index");
+		response.ElasticsearchServerError.Should().NotBeNull();
+		response.ElasticsearchServerError.Error.Reason.Should().StartWith("no such index");
 	}
 }
diff --git a/tests/Tests/Document/Single/DocumentsCoordinatedTests.cs b/tests/Tests/Document/Single/DocumentsCoordinatedTests.cs
index cbbecf606b3..7910d049ac7 100644
--- a/tests/Tests/Document/Single/DocumentsCoordinatedTests.cs
+++ b/tests/Tests/Document/Single/DocumentsCoordinatedTests.cs
@@ -73,7 +73,7 @@ public DocumentsCoordinatedTests(WritableCluster cluster, EndpointUsage usage) :
 	[I]
 	public async Task CreateResponse() => await Assert<IndexResponse>(IndexDocumentStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Index.Should().Be("project");
 		r.Id.Should().Be(v);
 		r.Version.Should().BeGreaterOrEqualTo(1);
@@ -88,13 +88,13 @@ public async Task CreateResponse() => await Assert<IndexResponse>(IndexDocumentS
 	[I]
 	public async Task ExistsResponse() => await Assert<ExistsResponse>(DocumentExistsStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 	});
 
 	[I]
 	public async Task GetResponse() => await Assert<GetResponse<Project>>(GetDocumentStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Index.Should().Be("project");
 		r.Id.Should().Be(v);
 		r.Version.Should().BeGreaterOrEqualTo(1);
@@ -114,7 +114,7 @@ public async Task GetResponse() => await Assert<GetResponse<Project>>(GetDocumen
 	[I]
 	public async Task DeleteResponse() => await Assert<DeleteResponse>(DeleteDocumentStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Index.Should().Be("project");
 		r.Id.Should().Be(v);
 		r.Version.Should().BeGreaterOrEqualTo(1);
diff --git a/tests/Tests/Document/Single/Get/GetApiTests.cs b/tests/Tests/Document/Single/Get/GetApiTests.cs
index 66409722c87..861b18ddb08 100644
--- a/tests/Tests/Document/Single/Get/GetApiTests.cs
+++ b/tests/Tests/Document/Single/Get/GetApiTests.cs
@@ -134,7 +134,7 @@ protected override void ExpectResponse(GetResponse<Project> response)
 		{
 			response.Found.Should().BeFalse();
 			response.Index.Should().BeNull();
-			response.ServerError.Should().NotBeNull();
+			response.ElasticsearchServerError.Should().NotBeNull();
 		}
 	}
 
diff --git a/tests/Tests/Document/Single/Index/IndexApiTests.cs b/tests/Tests/Document/Single/Index/IndexApiTests.cs
index cb783394d2e..59d9800e0bf 100644
--- a/tests/Tests/Document/Single/Index/IndexApiTests.cs
+++ b/tests/Tests/Document/Single/Index/IndexApiTests.cs
@@ -108,9 +108,9 @@ public void OpTypeCreate()
 
 		indexResult.ShouldNotBeValid();
 		indexResult.ApiCallDetails.HttpStatusCode.Should().Be(409);
-		indexResult.ServerError.Should().NotBeNull();
-		indexResult.ServerError.Error.Type.Should().Contain("conflict");
-		indexResult.ServerError.Status.Should().Be(409);
+		indexResult.ElasticsearchServerError.Should().NotBeNull();
+		indexResult.ElasticsearchServerError.Error.Type.Should().Contain("conflict");
+		indexResult.ElasticsearchServerError.Status.Should().Be(409);
 	}
 
 	[I]
diff --git a/tests/Tests/Document/Single/Update/UpdateDocumentsCoordinatedTests.cs b/tests/Tests/Document/Single/Update/UpdateDocumentsCoordinatedTests.cs
index f2ebe4a4926..3d7356452d2 100644
--- a/tests/Tests/Document/Single/Update/UpdateDocumentsCoordinatedTests.cs
+++ b/tests/Tests/Document/Single/Update/UpdateDocumentsCoordinatedTests.cs
@@ -150,14 +150,14 @@ public UpdateDocumentsCoordinatedTests(WritableCluster cluster, EndpointUsage us
 	[I]
 	public async Task UpdateWithScriptResponse() => await Assert<UpdateResponse<UpdateTestDocument>>(UpdateWithScriptStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Result.Should().Be(Result.Updated);
 	});
 
 	[I]
 	public async Task GetResponseAfterScriptedUpdateStep() => await Assert<GetResponse<UpdateTestDocument>>(GetAfterScriptedUpdateStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Source.Name.Should().Be("Initial"); // The name should not have changed
 		r.Source.Counter.Should().Be(5); // The script updates by 4
 		r.Source.RenamedField.Should().BeNull(); // This hasn't been set yet and should not exist on the source
@@ -166,14 +166,14 @@ public async Task GetResponseAfterScriptedUpdateStep() => await Assert<GetRespon
 	[I]
 	public async Task UpdateWithPartialResponse() => await Assert<UpdateResponse<UpdateTestDocument>>(UpdateWithPartialStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Result.Should().Be(Result.Updated);
 	});
 
 	[I]
 	public async Task GetResponseAfterPartialUpdateStep() => await Assert<GetResponse<UpdateTestDocument>>(GetAfterPartialUpdateStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Source.Name.Should().Be("Initial"); // The name should not have changed
 		r.Source.Counter.Should().Be(5); // The count should still be five
 		r.Source.RenamedField.Should().Be("Partial"); // The partial update should have added the partial value for RenamedField
@@ -182,21 +182,21 @@ public async Task GetResponseAfterPartialUpdateStep() => await Assert<GetRespons
 	[I]
 	public async Task UpdateWithPartialNoOpResponse() => await Assert<UpdateResponse<UpdateTestDocument>>(UpdateWithPartialStepTwo, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Result.Should().Be(Result.NoOp);
 	});
 
 	[I]
 	public async Task UpsertExistingResponse() => await Assert<UpdateResponse<UpdateTestDocument>>(UpsertExistingStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Result.Should().Be(Result.Updated);
 	});
 
 	[I]
 	public async Task GetResponseAfterUpsertExistingStep() => await Assert<GetResponse<UpdateTestDocument>>(GetAfterUpsertExistingStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Source.Name.Should().Be("Initial"); // The name should not have changed
 		r.Source.Counter.Should().Be(9); // The count should have been updated by the script
 		r.Source.RenamedField.Should().Be("Partial"); // The RenamedField should not have changed
@@ -205,14 +205,14 @@ public async Task GetResponseAfterUpsertExistingStep() => await Assert<GetRespon
 	[I]
 	public async Task UpsertNewResponse() => await Assert<UpdateResponse<UpdateTestDocument>>(UpsertNewStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Result.Should().Be(Result.Created);
 	});
 
 	[I]
 	public async Task GetResponseAfterUpsertNewStep() => await Assert<GetResponse<UpdateTestDocument>>(GetAfterUpsertNewStep, (v, r) =>
 	{
-		r.IsValid.Should().BeTrue();
+		r.IsValidResponse.Should().BeTrue();
 		r.Source.Name.Should().Be("Newly inserted");
 		r.Source.Counter.Should().Be(100);
 		r.Source.RenamedField.Should().BeNull();
diff --git a/tests/Tests/Framework/EndpointTests/ApiIntegrationTestBase.cs b/tests/Tests/Framework/EndpointTests/ApiIntegrationTestBase.cs
index f3a2e3583a2..e25b02724c6 100644
--- a/tests/Tests/Framework/EndpointTests/ApiIntegrationTestBase.cs
+++ b/tests/Tests/Framework/EndpointTests/ApiIntegrationTestBase.cs
@@ -42,7 +42,7 @@ [I] public virtual async Task ReturnsExpectedIsValid() =>
 		protected override Task AssertOnAllResponses(Action<TResponse> assert) =>
 			base.AssertOnAllResponses(r =>
 			{
-				if (TestClient.Configuration.RunIntegrationTests && !r.IsValid && r.ApiCallDetails.OriginalException != null
+				if (TestClient.Configuration.RunIntegrationTests && !r.IsValidResponse && r.ApiCallDetails.OriginalException != null
 					&& r.ApiCallDetails.OriginalException is not TransportException)
 				{
 					var e = ExceptionDispatchInfo.Capture(r.ApiCallDetails.OriginalException.Demystify());
@@ -90,7 +90,7 @@ public virtual async Task ReturnsExpectedIsValid() =>
 		protected override Task AssertOnAllResponses(Action<TResponse> assert) =>
 			base.AssertOnAllResponses(r =>
 			{
-				if (TestClient.Configuration.RunIntegrationTests && !r.IsValid && r.ApiCallDetails.OriginalException != null
+				if (TestClient.Configuration.RunIntegrationTests && !r.IsValidResponse && r.ApiCallDetails.OriginalException != null
 					&& r.ApiCallDetails.OriginalException is not TransportException)
 				{
 					var e = ExceptionDispatchInfo.Capture(r.ApiCallDetails.OriginalException.Demystify());
diff --git a/tests/Tests/Framework/EndpointTests/CoordinatedIntegrationTestBase.cs b/tests/Tests/Framework/EndpointTests/CoordinatedIntegrationTestBase.cs
index fb55034b938..cd19c00312c 100644
--- a/tests/Tests/Framework/EndpointTests/CoordinatedIntegrationTestBase.cs
+++ b/tests/Tests/Framework/EndpointTests/CoordinatedIntegrationTestBase.cs
@@ -70,7 +70,7 @@ private async Task AssertOnAllResponses<TResponse>(string name, LazyResponses re
 				throw new Exception($"{name} is not a request observed and so no call isolated values could be located for it");
 
 			var r = response;
-			if (TestClient.Configuration.RunIntegrationTests && !r.IsValid && r.ApiCallDetails.OriginalException != null
+			if (TestClient.Configuration.RunIntegrationTests && !r.IsValidResponse && r.ApiCallDetails.OriginalException != null
 				&& r.ApiCallDetails.OriginalException is not TransportException)
 			{
 				var e = ExceptionDispatchInfo.Capture(r.ApiCallDetails.OriginalException.Demystify());
diff --git a/tests/Tests/Framework/EndpointTests/TestState/EndpointUsage.cs b/tests/Tests/Framework/EndpointTests/TestState/EndpointUsage.cs
index 496bdc84e6d..fa4a28b2c06 100644
--- a/tests/Tests/Framework/EndpointTests/TestState/EndpointUsage.cs
+++ b/tests/Tests/Framework/EndpointTests/TestState/EndpointUsage.cs
@@ -141,7 +141,7 @@ public async Task AssertOnAllResponses(Action<TResponse> assert)
 				var r = kv.Value as TResponse;
 
 				//this is to make sure any unexpected exceptions on the response are rethrown and shown during testing
-				if (TestClient.Configuration.RunIntegrationTests && !r.IsValid && r.ApiCallDetails.OriginalException != null
+				if (TestClient.Configuration.RunIntegrationTests && !r.IsValidResponse && r.ApiCallDetails.OriginalException != null
 					&& r.ApiCallDetails.OriginalException is not TransportException)
 				{
 					var e = ExceptionDispatchInfo.Capture(r.ApiCallDetails.OriginalException.Demystify());
diff --git a/tests/Tests/IndexManagement/Mapping/GetMappingApiTests.cs b/tests/Tests/IndexManagement/Mapping/GetMappingApiTests.cs
index 062be3c4e34..a2946fe0363 100644
--- a/tests/Tests/IndexManagement/Mapping/GetMappingApiTests.cs
+++ b/tests/Tests/IndexManagement/Mapping/GetMappingApiTests.cs
@@ -77,6 +77,6 @@ protected override LazyResponses ClientUsage() => Calls(
 	protected override void ExpectResponse(MappingResponse response)
 	{
 		response.Indices.Should().BeEmpty();
-		response.ServerError.Should().NotBeNull();
+		response.ElasticsearchServerError.Should().NotBeNull();
 	}
 }
diff --git a/tests/Tests/Search/Scroll/ClearScroll/ClearScrollApiTests.cs b/tests/Tests/Search/Scroll/ClearScroll/ClearScrollApiTests.cs
index 28af7368cd7..da43634d755 100644
--- a/tests/Tests/Search/Scroll/ClearScroll/ClearScrollApiTests.cs
+++ b/tests/Tests/Search/Scroll/ClearScroll/ClearScrollApiTests.cs
@@ -47,7 +47,7 @@ protected override void OnBeforeCall(ElasticsearchClient client)
 	{
 		var searchResponse = Client.Search<Project>(s => s.Query(q => q.MatchAll()).Scroll(TimeSpan.FromMinutes(1)));
 
-		if (!searchResponse.IsValid)
+		if (!searchResponse.IsValidResponse)
 			throw new Exception("Setup: Initial scroll failed.");
 
 		_scrollId = searchResponse.ScrollId ?? _scrollId;
diff --git a/tests/Tests/Search/Scroll/Scroll/ScrollApiTests.cs b/tests/Tests/Search/Scroll/Scroll/ScrollApiTests.cs
index 389718745bf..8e4aaa21a18 100644
--- a/tests/Tests/Search/Scroll/Scroll/ScrollApiTests.cs
+++ b/tests/Tests/Search/Scroll/Scroll/ScrollApiTests.cs
@@ -44,7 +44,7 @@ protected override LazyResponses ClientUsage() => Calls(
 	protected override void OnBeforeCall(ElasticsearchClient client)
 	{
 		var response = client.Search<Project>(s => s.Query(q => q.MatchAll()).Scroll(TimeSpan.FromMinutes(1)));
-		if (!response.IsValid)
+		if (!response.IsValidResponse)
 			throw new Exception("Scroll setup failed");
 
 		_scrollId = response.ScrollId ?? _scrollId;
diff --git a/tests/Tests/Search/Scroll/Scroll/SlicedScrollSearchApiTests.cs b/tests/Tests/Search/Scroll/Scroll/SlicedScrollSearchApiTests.cs
index 9fa04955b63..322a64ad168 100644
--- a/tests/Tests/Search/Scroll/Scroll/SlicedScrollSearchApiTests.cs
+++ b/tests/Tests/Search/Scroll/Scroll/SlicedScrollSearchApiTests.cs
@@ -57,7 +57,7 @@ protected override void OnBeforeCall(ElasticsearchClient client)
 				SortOptions.Field("_doc", new FieldSort { Order = SortOrder.Asc })
 			})
 		);
-		if (!response.IsValid)
+		if (!response.IsValidResponse)
 			throw new Exception("Scroll setup failed");
 
 		_scrollId = response.ScrollId ?? _scrollId;
diff --git a/tests/Tests/Sql/ClearSqlCursorApiTests.cs b/tests/Tests/Sql/ClearSqlCursorApiTests.cs
index 95053968c64..21c0d56e839 100644
--- a/tests/Tests/Sql/ClearSqlCursorApiTests.cs
+++ b/tests/Tests/Sql/ClearSqlCursorApiTests.cs
@@ -50,7 +50,7 @@ protected override LazyResponses ClientUsage() => Calls(
 	protected override void OnBeforeCall(ElasticsearchClient client)
 	{
 		var sqlQueryResponse = Client.Sql.Query(q => q.Query(SqlQuery).FetchSize(5));
-		if (!sqlQueryResponse.IsValid)
+		if (!sqlQueryResponse.IsValidResponse)
 			throw new Exception("Setup: Initial scroll failed.");
 
 		_currentCursor = sqlQueryResponse.Cursor ?? _currentCursor;
diff --git a/tests/Tests/Tests.csproj b/tests/Tests/Tests.csproj
index 7b566bf90fa..aa817fdf9c8 100644
--- a/tests/Tests/Tests.csproj
+++ b/tests/Tests/Tests.csproj
@@ -10,7 +10,7 @@
     <ProjectReference Include="$(SolutionRoot)\tests\Tests.Core\Tests.Core.csproj" />
     <ProjectReference Include="$(SolutionRoot)\src\Elastic.Clients.Elasticsearch\Elastic.Clients.Elasticsearch.csproj" />
     <ProjectReference Include="$(SolutionRoot)\tests\Tests.ClusterLauncher\Tests.ClusterLauncher.csproj" />
-    <PackageReference Include="Elastic.Transport.VirtualizedCluster" Version="0.4.0" />
+    <PackageReference Include="Elastic.Transport.VirtualizedCluster" Version="0.4.2" />
     <PackageReference Include="FSharp.Core" Version="6.0.3" />
     <PackageReference Include="Bogus" Version="22.1.2" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
diff --git a/tests/Tests/packages.lock.json b/tests/Tests/packages.lock.json
index 7b928a42cf8..94d233ae460 100644
--- a/tests/Tests/packages.lock.json
+++ b/tests/Tests/packages.lock.json
@@ -31,11 +31,11 @@
       },
       "Elastic.Transport.VirtualizedCluster": {
         "type": "Direct",
-        "requested": "[0.4.0, )",
-        "resolved": "0.4.0",
-        "contentHash": "ayBs9J8+bi1hrlk3+kzlzfur9fTrRskz/IVQfNvxs74SP5gEaxiBp69V4r2WE6cVoZKJa583jyP5vb/yKk/lCg==",
+        "requested": "[0.4.2, )",
+        "resolved": "0.4.2",
+        "contentHash": "tyPrSQqfEPQjHVWDpZ+NbnuI4i6S5DXPQeJvgoqpHdD8l8g+3Luv3/0bRIms6L1neSzXZ+riPtHS9muGNV/1pQ==",
         "dependencies": {
-          "Elastic.Transport": "0.4.0"
+          "Elastic.Transport": "0.4.2"
         }
       },
       "FSharp.Core": {
@@ -195,8 +195,8 @@
       },
       "Elastic.Transport": {
         "type": "Transitive",
-        "resolved": "0.4.0",
-        "contentHash": "4uqaeeZOboqs8nSvYnQXnGOSTyPo4SvV4NH3o+Ls3OEV1d9VipYS09/8/DcmcklK7hWuQXhrdsQd1b6Vi0a//w==",
+        "resolved": "0.4.2",
+        "contentHash": "umDR9uAzO8KPgb96O6llqN7DIv7oqATB4MPr3UrDCJ6Su+l7KJhB7lwItf/cw727e1jKTG9QEqkW6tBGjYoe4w==",
         "dependencies": {
           "Microsoft.CSharp": "4.7.0",
           "System.Buffers": "4.5.1",
@@ -1492,7 +1492,7 @@
       "elastic.clients.elasticsearch": {
         "type": "Project",
         "dependencies": {
-          "Elastic.Transport": "[0.4.0, )"
+          "Elastic.Transport": "[0.4.2, )"
         }
       },
       "elastic.clients.elasticsearch.jsonnetserializer": {