diff --git a/src/Nethermind/Nethermind.AuRa.Test/AuRaBlockProducerTests.cs b/src/Nethermind/Nethermind.AuRa.Test/AuRaBlockProducerTests.cs
index 9b553fc0f52..db1245bc2ce 100644
--- a/src/Nethermind/Nethermind.AuRa.Test/AuRaBlockProducerTests.cs
+++ b/src/Nethermind/Nethermind.AuRa.Test/AuRaBlockProducerTests.cs
@@ -229,9 +229,9 @@ private async Task<TestResult> StartStop(Context context, bool processingQueueEm
                 });
 
             context.BlockProducerRunner.Start();
-            await processedEvent.WaitOneAsync(context.StepDelay * stepDelayMultiplier * 5, CancellationToken.None);
+            await processedEvent.WaitOneAsync(context.StepDelay * stepDelayMultiplier * 20, CancellationToken.None);
             context.BlockTree.ClearReceivedCalls();
-            await Task.Delay(context.StepDelay);
+            await Task.Delay(context.StepDelay * 2);
             processedEvent.Reset();
 
             try
@@ -248,7 +248,7 @@ private async Task<TestResult> StartStop(Context context, bool processingQueueEm
                     processedEvent.Reset();
                 }
 
-                await processedEvent.WaitOneAsync(context.StepDelay * stepDelayMultiplier * 5, CancellationToken.None);
+                await processedEvent.WaitOneAsync(context.StepDelay * stepDelayMultiplier * 20, CancellationToken.None);
 
             }
             finally
diff --git a/src/Nethermind/Nethermind.Config.Test/SampleJson/SampleJsonConfig.json b/src/Nethermind/Nethermind.Config.Test/SampleJson/SampleJsonConfig.json
index c2e3b7535a1..7ba16ed6f9c 100644
--- a/src/Nethermind/Nethermind.Config.Test/SampleJson/SampleJsonConfig.json
+++ b/src/Nethermind/Nethermind.Config.Test/SampleJson/SampleJsonConfig.json
@@ -4,7 +4,7 @@
     "Cipher": "test"
   },
   "JsonRpc": {
-    "EnabledModules": "Eth,Debug"
+    "EnabledModules": "Eth,Debug,"
   },
   "Discovery": {
     "Concurrency": "4",
@@ -14,4 +14,4 @@
   {
     "IndexLevelBucketSizes" : [16, 16, 16]
   }
-}
\ No newline at end of file
+}
diff --git a/src/Nethermind/Nethermind.JsonRpc.Test/Modules/TestRpcModuleProvider.cs b/src/Nethermind/Nethermind.JsonRpc.Test/Modules/TestRpcModuleProvider.cs
index f797c9adb14..8214f6a4d41 100644
--- a/src/Nethermind/Nethermind.JsonRpc.Test/Modules/TestRpcModuleProvider.cs
+++ b/src/Nethermind/Nethermind.JsonRpc.Test/Modules/TestRpcModuleProvider.cs
@@ -53,7 +53,7 @@ private void EnableModule<TOther>() where TOther : IRpcModule
             {
                 if (!_jsonRpcConfig.EnabledModules.Contains(rpcModuleAttribute.ModuleType))
                 {
-                    _jsonRpcConfig.EnabledModules = _jsonRpcConfig.EnabledModules.Union(new[] { rpcModuleAttribute.ModuleType }).ToArray();
+                    _jsonRpcConfig.EnabledModules = _jsonRpcConfig.EnabledModules.Union([rpcModuleAttribute.ModuleType]).ToArray();
                 }
             }
         }
diff --git a/src/Nethermind/Nethermind.JsonRpc/JsonRpcConfig.cs b/src/Nethermind/Nethermind.JsonRpc/JsonRpcConfig.cs
index b71dd400f67..8a1f556e69e 100644
--- a/src/Nethermind/Nethermind.JsonRpc/JsonRpcConfig.cs
+++ b/src/Nethermind/Nethermind.JsonRpc/JsonRpcConfig.cs
@@ -11,6 +11,7 @@ public class JsonRpcConfig : IJsonRpcConfig
 {
     public static readonly JsonRpcConfig Default = new();
     private int? _webSocketsPort;
+    private string[] _enabledModules = ModuleType.DefaultModules.ToArray();
     public bool Enabled { get; set; }
     public string Host { get; set; } = "127.0.0.1";
     public int Timeout { get; set; } = 20000;
@@ -29,7 +30,15 @@ public int WebSocketsPort
 
     public string? IpcUnixDomainSocketPath { get; set; } = null;
 
-    public string[] EnabledModules { get; set; } = ModuleType.DefaultModules.ToArray();
+    public string[] EnabledModules
+    {
+        get => _enabledModules;
+        set
+        {
+            _enabledModules = value.Where(m => !string.IsNullOrWhiteSpace(m)).ToArray();
+        }
+    }
+
     public string[] AdditionalRpcUrls { get; set; } = [];
     public long? GasCap { get; set; } = 100000000;
     public int ReportIntervalSeconds { get; set; } = 300;
diff --git a/src/Nethermind/Nethermind.JsonRpc/JsonRpcUrlCollection.cs b/src/Nethermind/Nethermind.JsonRpc/JsonRpcUrlCollection.cs
index 81af1e31b4f..892d32fab5f 100644
--- a/src/Nethermind/Nethermind.JsonRpc/JsonRpcUrlCollection.cs
+++ b/src/Nethermind/Nethermind.JsonRpc/JsonRpcUrlCollection.cs
@@ -30,8 +30,9 @@ public JsonRpcUrlCollection(ILogManager logManager, IJsonRpcConfig jsonRpcConfig
 
     private void BuildUrls(bool includeWebSockets)
     {
-        bool HasEngineApi = _jsonRpcConfig.EnabledModules.Any(m => m.Equals(ModuleType.Engine, StringComparison.OrdinalIgnoreCase));
-        JsonRpcUrl defaultUrl = new(Uri.UriSchemeHttp, _jsonRpcConfig.Host, _jsonRpcConfig.Port, RpcEndpoint.Http, HasEngineApi, _jsonRpcConfig.EnabledModules, HasEngineApi ? SocketClient<WebSocketMessageStream>.MAX_REQUEST_BODY_SIZE_FOR_ENGINE_API : _jsonRpcConfig.MaxRequestBodySize);
+        bool hasEngineApi = _jsonRpcConfig.EnabledModules.Any(m => m.Equals(ModuleType.Engine, StringComparison.OrdinalIgnoreCase));
+        long? maxRequestBodySize = hasEngineApi ? SocketClient<WebSocketMessageStream>.MAX_REQUEST_BODY_SIZE_FOR_ENGINE_API : _jsonRpcConfig.MaxRequestBodySize;
+        JsonRpcUrl defaultUrl = new(Uri.UriSchemeHttp, _jsonRpcConfig.Host, _jsonRpcConfig.Port, RpcEndpoint.Http, hasEngineApi, _jsonRpcConfig.EnabledModules, maxRequestBodySize);
 
         Add(defaultUrl.Port, defaultUrl);