diff --git a/DnsClientX.PowerShell/CmdletResolveDnsQuery.cs b/DnsClientX.PowerShell/CmdletResolveDnsQuery.cs
index ad165f49..5f7f3344 100644
--- a/DnsClientX.PowerShell/CmdletResolveDnsQuery.cs
+++ b/DnsClientX.PowerShell/CmdletResolveDnsQuery.cs
@@ -89,7 +89,8 @@ public sealed class CmdletResolveDnsQuery : AsyncPSCmdlet {
         [Alias("ServerName")]
         [Parameter(Mandatory = false, ParameterSetName = "ServerName")]
         [Parameter(Mandatory = false, ParameterSetName = "PatternServerName")]
-        public List<string> Server = new List<string>();
+        [ValidateNotNull]
+        public List<string> Server { get; set; } = new List<string>();
 
         /// <summary>
         /// <para type="description">One or more resolver endpoints in string format. Accepted: "1.1.1.1:53", "[2606:4700:4700::1111]:53", "dns.google:53", or DoH URLs like "https://dns.google/dns-query".</para>
diff --git a/Module/Tests/ResolveDnsBinding.Tests.ps1 b/Module/Tests/ResolveDnsBinding.Tests.ps1
new file mode 100644
index 00000000..cfbeac37
--- /dev/null
+++ b/Module/Tests/ResolveDnsBinding.Tests.ps1
@@ -0,0 +1,16 @@
+Import-Module "$PSScriptRoot/../DnsClientX.psd1" -Force
+
+Describe 'Resolve-Dns binding' {
+    It 'exposes Server parameter with ServerName alias and list type' {
+        $cmd = Get-Command Resolve-Dns
+        $parameter = $cmd.Parameters['Server']
+
+        $parameter | Should -Not -BeNullOrEmpty
+        $parameter.Aliases | Should -Contain 'ServerName'
+        $parameter.ParameterType | Should -Be ([System.Collections.Generic.List[string]])
+    }
+
+    It 'rejects null Server values during binding' {
+        { Resolve-Dns -Name 'example.com' -Server $null -ErrorAction Stop } | Should -Throw -ExceptionType ([System.Management.Automation.ParameterBindingException])
+    }
+}