diff --git a/src/Nethermind/Nethermind.JsonRpc.Test/JsonRpcServiceTests.cs b/src/Nethermind/Nethermind.JsonRpc.Test/JsonRpcServiceTests.cs
index 91583f619e4..cb40d0e2626 100644
--- a/src/Nethermind/Nethermind.JsonRpc.Test/JsonRpcServiceTests.cs
+++ b/src/Nethermind/Nethermind.JsonRpc.Test/JsonRpcServiceTests.cs
@@ -48,7 +48,7 @@ public void Initialize()
     private ILogManager _logManager = null!;
     private JsonRpcContext _context = null!;
 
-    private JsonRpcResponse TestRequest<T>(T module, string method, params string[] parameters) where T : IRpcModule
+    private JsonRpcResponse TestRequest<T>(T module, string method, params string[]? parameters) where T : IRpcModule
     {
         RpcModuleProvider moduleProvider = new(new FileSystem(), _configurationProvider.GetConfig<IJsonRpcConfig>(), LimboLogs.Instance);
         moduleProvider.Register(new SingletonModulePool<T>(new SingletonFactory<T>(module), true));
@@ -182,7 +182,7 @@ public void NetVersionTest()
     {
         INetRpcModule netRpcModule = Substitute.For<INetRpcModule>();
         netRpcModule.net_version().ReturnsForAnyArgs(x => ResultWrapper<string>.Success("1"));
-        JsonRpcSuccessResponse? response = TestRequest(netRpcModule, "net_version") as JsonRpcSuccessResponse;
+        JsonRpcSuccessResponse? response = TestRequest(netRpcModule, "net_version", null) as JsonRpcSuccessResponse;
         Assert.That(response?.Result, Is.EqualTo("1"));
         Assert.IsNotInstanceOf<JsonRpcErrorResponse>(response);
     }
diff --git a/src/Nethermind/Nethermind.JsonRpc.Test/RpcTest.cs b/src/Nethermind/Nethermind.JsonRpc.Test/RpcTest.cs
index 43a8d311af4..d66f7b41528 100644
--- a/src/Nethermind/Nethermind.JsonRpc.Test/RpcTest.cs
+++ b/src/Nethermind/Nethermind.JsonRpc.Test/RpcTest.cs
@@ -63,9 +63,9 @@ public static IJsonRpcService BuildRpcService<T>(T module) where T : class, IRpc
         return service;
     }
 
-    public static JsonRpcRequest GetJsonRequest(string method, params string[] parameters)
+    public static JsonRpcRequest GetJsonRequest(string method, params string[]? parameters)
     {
-        var doc = JsonDocument.Parse(JsonSerializer.Serialize(parameters?.ToArray() ?? Array.Empty<string>()));
+        var doc = JsonDocument.Parse(JsonSerializer.Serialize(parameters?.ToArray()));
         var request = new JsonRpcRequest()
         {
             JsonRpc = "2.0",
diff --git a/src/Nethermind/Nethermind.JsonRpc/JsonRpcService.cs b/src/Nethermind/Nethermind.JsonRpc/JsonRpcService.cs
index 2c34729f701..bea90a5b9a4 100644
--- a/src/Nethermind/Nethermind.JsonRpc/JsonRpcService.cs
+++ b/src/Nethermind/Nethermind.JsonRpc/JsonRpcService.cs
@@ -99,12 +99,16 @@ private async Task<JsonRpcResponse> ExecuteAsync(JsonRpcRequest request, string
 
         LogRequest(methodName, providedParameters, method.expectedParameters);
 
-        int missingParamsCount = method.expectedParameters.Length - providedParameters.GetArrayLength();
-        foreach (JsonElement item in providedParameters.EnumerateArray())
+        var providedParametersLength = providedParameters.ValueKind == JsonValueKind.Array ? providedParameters.GetArrayLength() : 0;
+        int missingParamsCount = method.expectedParameters.Length - providedParametersLength;
+        if (providedParametersLength > 0)
         {
-            if (item.ValueKind == JsonValueKind.Null || (item.ValueKind == JsonValueKind.String && item.ValueEquals(ReadOnlySpan<byte>.Empty)))
+            foreach (JsonElement item in providedParameters.EnumerateArray())
             {
-                missingParamsCount++;
+                if (item.ValueKind == JsonValueKind.Null || (item.ValueKind == JsonValueKind.String && item.ValueEquals(ReadOnlySpan<byte>.Empty)))
+                {
+                    missingParamsCount++;
+                }
             }
         }
 
@@ -232,7 +236,7 @@ private void LogRequest(string methodName, JsonElement providedParameters, Param
             int paramsCount = 0;
             const string separator = ", ";
 
-            if (providedParameters.ValueKind != JsonValueKind.Undefined && providedParameters.ValueKind != JsonValueKind.Null)
+            if (providedParameters.ValueKind == JsonValueKind.Array)
             {
                 foreach (JsonElement param in providedParameters.EnumerateArray())
                 {