diff --git a/terraform/parser.go b/terraform/parser.go
index 768519c..1c2bf0d 100644
--- a/terraform/parser.go
+++ b/terraform/parser.go
@@ -50,7 +50,7 @@ func NewDefaultParser() *DefaultParser {
 // NewFmtParser is FmtParser initialized with its Regexp
 func NewFmtParser() *FmtParser {
 	return &FmtParser{
-		Fail: regexp.MustCompile(`(?m)^(diff a/)`),
+		Fail: regexp.MustCompile(`(?m)^@@[^@]+@@`),
 	}
 }
 
diff --git a/terraform/parser_test.go b/terraform/parser_test.go
index 9e6d2a2..a741ade 100644
--- a/terraform/parser_test.go
+++ b/terraform/parser_test.go
@@ -6,7 +6,8 @@ import (
 	"testing"
 )
 
-const fmtSuccessResult = `
+// terraform fmt -diff=true -write=false (version 0.11.x)
+const fmtFailResult0_11 = `
 google_spanner_database.tf
 diff a/google_spanner_database.tf b/google_spanner_database.tf
 --- /tmp/398669432
@@ -28,6 +29,19 @@ diff a/google_spanner_instance.tf b/google_spanner_instance.tf
 +
 `
 
+// terraform fmt -diff=true -write=false (version 0.12.x)
+const fmtFailResult0_12 = `
+versions.tf
+--- old/versions.tf
++++ new/versions.tf
+@@ -1,4 +1,4 @@
+ 
+ terraform {
+-  required_version     = ">= 0.12"
++  required_version = ">= 0.12"
+ }
+`
+
 const planSuccessResult = `
 Refreshing Terraform state in-memory prior to plan...
 The refreshed state will be used to calculate this plan, but will not be
@@ -260,7 +274,16 @@ func TestFmtParserParse(t *testing.T) {
 	}{
 		{
 			name: "diff",
-			body: fmtSuccessResult,
+			body: fmtFailResult0_11,
+			result: ParseResult{
+				Result:   "There is diff in your .tf file (need to be formatted)",
+				ExitCode: 1,
+				Error:    nil,
+			},
+		},
+		{
+			name: "diff",
+			body: fmtFailResult0_12,
 			result: ParseResult{
 				Result:   "There is diff in your .tf file (need to be formatted)",
 				ExitCode: 1,