diff --git a/terraform/transform_root_test.go b/terraform/transform_root_test.go
index 1cfec3995..9f231906b 100644
--- a/terraform/transform_root_test.go
+++ b/terraform/transform_root_test.go
@@ -10,12 +10,21 @@ func TestRootTransformer(t *testing.T) {
 
 	g := Graph{Path: RootModulePath}
 	{
-		tf := &ConfigTransformerOld{Module: mod}
+		tf := &ConfigTransformer{Module: mod}
 		if err := tf.Transform(&g); err != nil {
 			t.Fatalf("err: %s", err)
 		}
 	}
 
+	{
+		transform := &MissingProviderTransformer{
+			Providers: []string{"aws", "do"},
+		}
+		if err := transform.Transform(&g); err != nil {
+			t.Fatalf("err: %s", err)
+		}
+	}
+
 	{
 		transform := &ProviderTransformer{}
 		if err := transform.Transform(&g); err != nil {