diff --git a/d365fo.tools/internal/functions/publish-d365foresources.ps1 b/d365fo.tools/internal/functions/publish-d365foresources.ps1
index c69ac72b..cd3a1761 100644
--- a/d365fo.tools/internal/functions/publish-d365foresources.ps1
+++ b/d365fo.tools/internal/functions/publish-d365foresources.ps1
@@ -158,6 +158,7 @@ function Publish-Resource {
 
 function Test-PublishResource {
     [CmdletBinding()]
+    [OutputType([System.Boolean])]
     param (
         [Parameter(Mandatory = $true)]
         [hashtable] $ResourceData,