diff --git a/builtin/providers/aws/resource_aws_db_subnet_group_test.go b/builtin/providers/aws/resource_aws_db_subnet_group_test.go
index 14e03ee053..cbf1f84978 100644
--- a/builtin/providers/aws/resource_aws_db_subnet_group_test.go
+++ b/builtin/providers/aws/resource_aws_db_subnet_group_test.go
@@ -38,7 +38,7 @@ func TestAccAWSDBSubnetGroup_basic(t *testing.T) {
 
 // Regression test for https://github.com/hashicorp/terraform/issues/2603 and
 // https://github.com/hashicorp/terraform/issues/2664
-func TestAccAWSDBSubnetGroup_withUnderscores(t *testing.T) {
+func TestAccAWSDBSubnetGroup_withUndocumentedCharacters(t *testing.T) {
 	var v rds.DBSubnetGroup
 
 	testCheck := func(*terraform.State) error {