diff --git a/pkg/app/app_template_test.go b/pkg/app/app_template_test.go
index a29b1fea..2890a4d7 100644
--- a/pkg/app/app_template_test.go
+++ b/pkg/app/app_template_test.go
@@ -414,7 +414,7 @@ releases:
 	t.Run("fail due to unknown field with goccy/go-yaml", func(t *testing.T) {
 		check(t, testcase{
 			goccyGoYaml: true,
-			error: `in ./helmfile.yaml: failed to read helmfile.yaml: reading document at index 1: [4:3] unknown field "foobar"
+			error: `in ./helmfile.yaml: failed to read helmfile.yaml: reading document at index 1, you should add .gotmpl extension to your helmfile to enable helmfile to load it as a template since helmfile v1: [4:3] unknown field "foobar"
    2 | releases:
    3 | - name: app1
 >  4 |   foobar: FOOBAR
@@ -426,7 +426,7 @@ releases:
 	t.Run("fail due to unknown field with gopkg.in/yaml.v2", func(t *testing.T) {
 		check(t, testcase{
 			goccyGoYaml: false,
-			error: `in ./helmfile.yaml: failed to read helmfile.yaml: reading document at index 1: yaml: unmarshal errors:
+			error: `in ./helmfile.yaml: failed to read helmfile.yaml: reading document at index 1, you should add .gotmpl extension to your helmfile to enable helmfile to load it as a template since helmfile v1: yaml: unmarshal errors:
   line 4: field foobar not found in type state.ReleaseSpec`,
 		})
 	})