diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 4207de22..cfdc62ec 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -1,5 +1,15 @@
 name: Go
-on: push
+
+on:
+  push:
+    branches:
+      - v2
+  pull_request:
+    branches:
+      - v2
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 1 * *"
 
 jobs:
 
diff --git a/service/webhook.go b/service/webhook.go
index 6bd431cb..d1f8664f 100644
--- a/service/webhook.go
+++ b/service/webhook.go
@@ -127,7 +127,7 @@ func WebhookEventHandler(c echo.Context, reqBody, resBody []byte) {
 				message += fmt.Sprintf("- 請求先グループ: %s\n", resApp.Group.Name)
 			}
 
-			if resApp.Tags != nil && len(resApp.Tags) != 0 {
+			if len(resApp.Tags) != 0 {
 				tags := lo.Map(resApp.Tags, func(tag *Tag, index int) string {
 					return tag.Name
 				})
@@ -188,7 +188,7 @@ func WebhookEventHandler(c echo.Context, reqBody, resBody []byte) {
 		if resApp.Group != nil {
 			message += fmt.Sprintf("- 関連するグループ: %s\n", resApp.Group.Name)
 		}
-		if resApp.Tags != nil && len(resApp.Tags) != 0 {
+		if len(resApp.Tags) != 0 {
 			tags := lo.Map(resApp.Tags, func(tag *Tag, index int) string {
 				return tag.Name
 			})
diff --git a/testutil/random/ramdom.go b/testutil/random/ramdom.go
index f4c7de62..1b3645fc 100644
--- a/testutil/random/ramdom.go
+++ b/testutil/random/ramdom.go
@@ -20,39 +20,39 @@ func AlphaNumeric(t *testing.T, n int) string {
 	return string(b)
 }
 
-func Numeric(t *testing.T, max int) int {
+func Numeric(t *testing.T, n int) int {
 	t.Helper()
-	return rand.IntN(max)
+	return rand.IntN(n)
 }
 
-func Numeric64(t *testing.T, max int64) int64 {
+func Numeric64(t *testing.T, n int64) int64 {
 	t.Helper()
-	return rand.Int64N(max)
+	return rand.Int64N(n)
 }
 
-func AlphaNumericSlice(t *testing.T, length int, max int64) []string {
+func AlphaNumericSlice(t *testing.T, length int, n int64) []string {
 	t.Helper()
 	slice := []string{}
 	for range length {
-		slice = append(slice, AlphaNumeric(t, int(max)))
+		slice = append(slice, AlphaNumeric(t, int(n)))
 	}
 	return slice
 }
 
-func NumericSlice(t *testing.T, length int, max int) []int {
+func NumericSlice(t *testing.T, length int, n int) []int {
 	t.Helper()
 	slice := []int{}
 	for range length {
-		slice = append(slice, Numeric(t, max))
+		slice = append(slice, Numeric(t, n))
 	}
 	return slice
 }
 
-func Numeric64Slice(t *testing.T, length int, max int64) []int64 {
+func Numeric64Slice(t *testing.T, length int, n int64) []int64 {
 	t.Helper()
 	slice := []int64{}
 	for range length {
-		slice = append(slice, Numeric64(t, max))
+		slice = append(slice, Numeric64(t, n))
 	}
 	return slice
 }