diff --git a/internal/services/servicebus/servicebus_subscription_resource_test.go b/internal/services/servicebus/servicebus_subscription_resource_test.go
index 0ab4eb6f2d1a..f1e980e343d1 100644
--- a/internal/services/servicebus/servicebus_subscription_resource_test.go
+++ b/internal/services/servicebus/servicebus_subscription_resource_test.go
@@ -238,7 +238,7 @@ resource "azurerm_servicebus_topic" "test" {
 }
 
 resource "azurerm_servicebus_subscription" "test" {
-  name                = "acctestservicebussubscription-%d"
+  name                = "_acctestservicebussubscription-%d_"
   namespace_name      = "${azurerm_servicebus_namespace.test.name}"
   topic_name          = "${azurerm_servicebus_topic.test.name}"
   resource_group_name = "${azurerm_resource_group.test.name}"
diff --git a/internal/services/servicebus/validate/subscription_name.go b/internal/services/servicebus/validate/subscription_name.go
index 2ed9bb8e8455..06bcf145c532 100644
--- a/internal/services/servicebus/validate/subscription_name.go
+++ b/internal/services/servicebus/validate/subscription_name.go
@@ -9,7 +9,7 @@ import (
 
 func SubscriptionName() pluginsdk.SchemaValidateFunc {
 	return validation.StringMatch(
-		regexp.MustCompile("^[a-zA-Z0-9][-._a-zA-Z0-9]{0,48}([a-zA-Z0-9])?$"),
-		"The name can contain only letters, numbers, periods, hyphens and underscores. The name must start and end with a letter or number and be a maximum of 50 characters long.",
+		regexp.MustCompile("^[_a-zA-Z0-9][-._a-zA-Z0-9]{0,48}([_a-zA-Z0-9])?$"),
+		"The name can contain only letters, numbers, periods, hyphens and underscores. The name must start and end with a letter, number or underscore and be a maximum of 50 characters long.",
 	)
 }