diff --git a/chglog_test.go b/chglog_test.go
index 4d81bc33..01eae8ab 100644
--- a/chglog_test.go
+++ b/chglog_test.go
@@ -48,23 +48,23 @@ func TestGeneratorWithTypeScopeSubject(t *testing.T) {
 	testName := "type_scope_subject"
 
 	setup(testName, func(git gitcmd.Client) {
-		git.Exec("commit", "-m", "--allow-empty", "chore(*): First commit")
-		git.Exec("commit", "--allow-empty", "-m", "feat(core): Add foo bar")
-		git.Exec("commit", "--allow-empty", "-m", "docs(readme): Update usage #123")
+		git.Exec("commit", "--allow-empty", "--date", "Mon Jan 1 00:00:00 2018 +0900", "-m", "chore(*): First commit")
+		git.Exec("commit", "--allow-empty", "--date", "Mon Jan 1 00:01:00 2018 +0900", "-m", "feat(core): Add foo bar")
+		git.Exec("commit", "--allow-empty", "--date", "Mon Jan 1 00:02:00 2018 +0900", "-m", "docs(readme): Update usage #123")
 
 		git.Exec("tag", "1.0.0")
-		git.Exec("commit", "--allow-empty", "-m", "feat(parser): New some super options #333")
-		git.Exec("commit", "--allow-empty", "-m", "Merge pull request #999 from tsuyoshiwada/patch-1")
-		git.Exec("commit", "--allow-empty", "-m", "Merge pull request #1000 from tsuyoshiwada/patch-1")
-		git.Exec("commit", "--allow-empty", "-m", "Revert \"feat(core): Add foo bar @mention and issue #987\"")
+		git.Exec("commit", "--allow-empty", "--date", "Tue Jan 2 00:00:00 2018 +0900", "-m", "feat(parser): New some super options #333")
+		git.Exec("commit", "--allow-empty", "--date", "Tue Jan 2 00:01:00 2018 +0900", "-m", "Merge pull request #999 from tsuyoshiwada/patch-1")
+		git.Exec("commit", "--allow-empty", "--date", "Tue Jan 2 00:02:00 2018 +0900", "-m", "Merge pull request #1000 from tsuyoshiwada/patch-1")
+		git.Exec("commit", "--allow-empty", "--date", "Tue Jan 2 00:03:00 2018 +0900", "-m", "Revert \"feat(core): Add foo bar @mention and issue #987\"")
 
 		git.Exec("tag", "1.1.0")
-		git.Exec("commit", "--allow-empty", "-m", "feat(context): Online breaking change\n\nBREAKING CHANGE: Online breaking change message.")
-		git.Exec("commit", "--allow-empty", "-m", "feat(router): Muliple breaking change\n\nThis is body,\n\nBREAKING CHANGE:\nMultiple\nbreaking\nchange message.")
+		git.Exec("commit", "--allow-empty", "--date", "Wed Jan 3 00:00:00 2018 +0900", "-m", "feat(context): Online breaking change\n\nBREAKING CHANGE: Online breaking change message.")
+		git.Exec("commit", "--allow-empty", "--date", "Wed Jan 3 00:01:00 2018 +0900", "-m", "feat(router): Muliple breaking change\n\nThis is body,\n\nBREAKING CHANGE:\nMultiple\nbreaking\nchange message.")
 
 		git.Exec("tag", "2.0.0-beta.0")
-		git.Exec("commit", "--allow-empty", "-m", "refactor(context): gofmt")
-		git.Exec("commit", "--allow-empty", "-m", "fix(core): Fix commit\n\nThis is body message.")
+		git.Exec("commit", "--allow-empty", "--date", "Thu Jan 4 00:00:00 2018 +0900", "-m", "refactor(context): gofmt")
+		git.Exec("commit", "--allow-empty", "--date", "Thu Jan 4 00:01:00 2018 +0900", "-m", "fix(core): Fix commit\n\nThis is body message.")
 	})
 
 	gen := NewGenerator(&Config{
@@ -120,7 +120,7 @@ func TestGeneratorWithTypeScopeSubject(t *testing.T) {
 	gen.Generate(buf, "")
 
 	assert.Equal(`<a name="2.0.0-beta.0"></a>
-## 2.0.0-beta.0 (2018-02-10)
+## 2.0.0-beta.0 (2018-01-03)
 
 ### Features
 
@@ -138,7 +138,7 @@ Online breaking change message.
 
 
 <a name="1.1.0"></a>
-## 1.1.0 (2018-02-10)
+## 1.1.0 (2018-01-02)
 
 ### Features
 
@@ -151,7 +151,7 @@ Online breaking change message.
 
 
 <a name="1.0.0"></a>
-## 1.0.0 (2018-02-10)
+## 1.0.0 (2018-01-01)
 
 ### Features