diff --git a/modules/Microsoft.DBforPostgreSQL/flexibleServers/.test/private/dependencies.bicep b/modules/Microsoft.DBforPostgreSQL/flexibleServers/.test/private/dependencies.bicep
index 79f6a40138..0324dbcc0d 100644
--- a/modules/Microsoft.DBforPostgreSQL/flexibleServers/.test/private/dependencies.bicep
+++ b/modules/Microsoft.DBforPostgreSQL/flexibleServers/.test/private/dependencies.bicep
@@ -36,7 +36,7 @@ resource virtualNetwork 'Microsoft.Network/virtualNetworks@2022-01-01' = {
 }
 
 resource privateDNSZone 'Microsoft.Network/privateDnsZones@2020-06-01' = {
-    name: 'postgres.database.azure.com'
+    name: '${split(virtualNetworkName, '-')[1]}.postgres.database.azure.com'
     location: 'global'
 
     resource virtualNetworkLinks 'virtualNetworkLinks@2020-06-01' = {