diff --git a/powershell/public/Send-MtMail.ps1 b/powershell/public/Send-MtMail.ps1
index 69e2914c..85392079 100644
--- a/powershell/public/Send-MtMail.ps1
+++ b/powershell/public/Send-MtMail.ps1
@@ -25,6 +25,7 @@
     https://maester.dev/docs/commands/Send-MtMail
 #>
 function Send-MtMail {
+    [OutputType([System.Collections.Hashtable])]
     [CmdletBinding()]
     param(
         # The Maester test results returned from `Invoke-Pester -PassThru | ConvertTo-MtMaesterResult`