diff --git a/tests/inboundAgent.Tests.ps1 b/tests/inboundAgent.Tests.ps1
index f60c369e..b81695ce 100644
--- a/tests/inboundAgent.Tests.ps1
+++ b/tests/inboundAgent.Tests.ps1
@@ -21,6 +21,10 @@ $global:WINDOWSVERSION = $items[2]
 $global:CONTAINERSHELL="powershell.exe"
 if($global:WINDOWSFLAVOR -eq 'nanoserver') {
     $global:CONTAINERSHELL = "pwsh.exe"
+    # Special case for nanoserver-1809
+    if($global:WINDOWSVERSION -eq '1809') {
+        $global:WINDOWS_VERSION_TAG = '1809'
+    }
 }