diff --git a/CodexNetDeployer/Configuration.cs b/CodexNetDeployer/Configuration.cs
index 2e7f232..b25e483 100644
--- a/CodexNetDeployer/Configuration.cs
+++ b/CodexNetDeployer/Configuration.cs
@@ -8,16 +8,16 @@ namespace CodexNetDeployer
     public class Configuration
     {
         [Uniform("codex-image", "ci", "CODEXIMAGE", true, "Docker image of Codex.")]
-        public string CodexImage { get; set; } = string.Empty;
+        public string CodexImage { get; set; } = CodexContainerRecipe.DockerImage;
 
         [Uniform("geth-image", "gi", "GETHIMAGE", true, "Docker image of Geth.")]
-        public string GethImage { get; set; } = string.Empty;
+        public string GethImage { get; set; } = GethContainerRecipe.DockerImage;
 
         [Uniform("contracts-image", "oi", "CONTRACTSIMAGE", true, "Docker image of Codex Contracts.")]
-        public string ContractsImage { get; set; } = string.Empty;
+        public string ContractsImage { get; set; } = CodexContractsContainerRecipe.DockerImage;
 
-        [Uniform("kube-config", "kc", "KUBECONFIG", true, "Path to Kubeconfig file.")]
-        public string KubeConfigFile { get; set; } = string.Empty;
+        [Uniform("kube-config", "kc", "KUBECONFIG", false, "Path to Kubeconfig file. Use 'null' (default) to use local cluster.")]
+        public string KubeConfigFile { get; set; } = "null";
 
         [Uniform("kube-namespace", "kn", "KUBENAMESPACE", true, "Kubernetes namespace to be used for deployment.")]
         public string KubeNamespace { get; set; } = string.Empty;
@@ -32,18 +32,10 @@ namespace CodexNetDeployer
         public int? StorageQuota { get; set; }
 
         [Uniform("log-level", "l", "LOGLEVEL", true, "Log level used by each Codex node. [Trace, Debug*, Info, Warn, Error]")]
-        public CodexLogLevel CodexLogLevel { get; set; }
+        public CodexLogLevel CodexLogLevel { get; set; } = CodexLogLevel.Debug;
 
         public TestRunnerLocation RunnerLocation { get; set; } = TestRunnerLocation.InternalToCluster;
 
-        public class Defaults
-        {
-            public string CodexImage { get; set; } = CodexContainerRecipe.DockerImage;
-            public string GethImage { get; set; } = GethContainerRecipe.DockerImage;
-            public string ContractsImage { get; set; } = CodexContractsContainerRecipe.DockerImage;
-            public CodexLogLevel CodexLogLevel { get; set; } = CodexLogLevel.Debug;
-        }
-
         public List<string> Validate()
         {
             var errors = new List<string>();
@@ -74,7 +66,7 @@ namespace CodexNetDeployer
         {
             if (value == null || value.Value < 1)
             {
-                errors.Add($"{variable} is must be set and must be greater than 0.");
+                errors.Add($"{variable} must be set and must be greater than 0.");
             }
         }
 
@@ -82,7 +74,7 @@ namespace CodexNetDeployer
         {
             if (string.IsNullOrWhiteSpace(value))
             {
-                errors.Add($"{variable} is must be set.");
+                errors.Add($"{variable} must be set.");
             }
         }
     }
diff --git a/CodexNetDeployer/Deployer.cs b/CodexNetDeployer/Deployer.cs
index 5745dd9..ba0ecc5 100644
--- a/CodexNetDeployer/Deployer.cs
+++ b/CodexNetDeployer/Deployer.cs
@@ -51,9 +51,11 @@ namespace CodexNetDeployer
 
         private (WorkflowCreator, TestLifecycle) CreateFacilities()
         {
+            var kubeConfig = GetKubeConfig(config.KubeConfigFile);
+
             var lifecycleConfig = new DistTestCore.Configuration
             (
-                kubeConfigFile: config.KubeConfigFile,
+                kubeConfigFile: kubeConfig,
                 logPath: "null",
                 logDebug: false,
                 dataFilesPath: "notUsed",
@@ -61,18 +63,24 @@ namespace CodexNetDeployer
                 runnerLocation: config.RunnerLocation
             );
 
-            var kubeConfig = new KubernetesWorkflow.Configuration(
+            var kubeFlowConfig = new KubernetesWorkflow.Configuration(
                 k8sNamespacePrefix: config.KubeNamespace,
-                kubeConfigFile: config.KubeConfigFile,
+                kubeConfigFile: kubeConfig,
                 operationTimeout: timeset.K8sOperationTimeout(),
                 retryDelay: timeset.WaitForK8sServiceDelay());
 
-            var workflowCreator = new WorkflowCreator(log, kubeConfig, testNamespacePostfix: string.Empty);
+            var workflowCreator = new WorkflowCreator(log, kubeFlowConfig, testNamespacePostfix: string.Empty);
             var lifecycle = new TestLifecycle(log, lifecycleConfig, timeset, workflowCreator);
 
             return (workflowCreator, lifecycle);
         }
 
+        private string? GetKubeConfig(string kubeConfigFile)
+        {
+            if (string.IsNullOrEmpty(kubeConfigFile) || kubeConfigFile.ToLowerInvariant() == "null") return null;
+            return kubeConfigFile;
+        }
+
         private DeploymentMetadata CreateMetadata()
         {
             return new DeploymentMetadata(
diff --git a/CodexNetDeployer/Program.cs b/CodexNetDeployer/Program.cs
index bc38c80..4ac3a2f 100644
--- a/CodexNetDeployer/Program.cs
+++ b/CodexNetDeployer/Program.cs
@@ -17,7 +17,7 @@ public class Program
             return;
         }
 
-        var uniformArgs = new ArgsUniform<Configuration>(new Configuration.Defaults(), args);
+        var uniformArgs = new ArgsUniform<Configuration>(args);
         var config = uniformArgs.Parse(true);
         
         if (args.Any(a => a == "--external"))