diff --git a/cmd/boardvoting/config.go b/cmd/boardvoting/config.go
index 023034f..203dbb6 100644
--- a/cmd/boardvoting/config.go
+++ b/cmd/boardvoting/config.go
@@ -30,6 +30,7 @@ const (
 	httpReadHeaderTimeout = 5 * time.Second
 	httpReadTimeout       = 5 * time.Second
 	httpWriteTimeout      = 10 * time.Second
+	smtpPort              = 25
 	smtpTimeout           = 10 * time.Second
 )
 
@@ -80,7 +81,7 @@ func parseConfig(configFile string) (*Config, error) {
 		},
 		MailConfig: &mailConfig{
 			SMTPHost:    "localhost",
-			SMTPPort:    25,
+			SMTPPort:    smtpPort,
 			SMTPTimeOut: smtpTimeout,
 		},
 	}
diff --git a/cmd/boardvoting/handlers.go b/cmd/boardvoting/handlers.go
index 1dc0dc2..3886aca 100644
--- a/cmd/boardvoting/handlers.go
+++ b/cmd/boardvoting/handlers.go
@@ -659,8 +659,10 @@ func (app *application) healthCheck(w http.ResponseWriter, _ *http.Request) {
 	w.Header().Set("Refresh", "10")
 	w.Header().Add("Cache-Control", "no-store")
 
-	var err error
-	var hasErrors = false
+	var (
+		err       error
+		hasErrors = false
+	)
 
 	if err = app.mailNotifier.Ping(); err != nil {
 		hasErrors = true
diff --git a/cmd/boardvoting/handlers_test.go b/cmd/boardvoting/handlers_test.go
index a00b67a..d60cdb1 100644
--- a/cmd/boardvoting/handlers_test.go
+++ b/cmd/boardvoting/handlers_test.go
@@ -48,8 +48,9 @@ func prepareTestDb(t *testing.T) *sqlx.DB {
 	return dbx
 }
 
-func StartTestTcpServer(t *testing.T) int {
+func StartTestTCPServer(t *testing.T) int {
 	t.Helper()
+
 	port, err := tcputil.EmptyPort()
 	require.NoError(t, err)
 
@@ -68,6 +69,7 @@ func StartTestTcpServer(t *testing.T) int {
 
 			if err != nil {
 				t.Errorf("could not accept connection: %v", err)
+
 				return
 			}
 
@@ -81,7 +83,7 @@ func StartTestTcpServer(t *testing.T) int {
 }
 
 func TestApplication_healthCheck(t *testing.T) {
-	port := StartTestTcpServer(t)
+	port := StartTestTCPServer(t)
 
 	t.Run("check with valid DB", func(t *testing.T) {
 		rr := httptest.NewRecorder()
diff --git a/cmd/boardvoting/jobs.go b/cmd/boardvoting/jobs.go
index dd40476..f3c0b08 100644
--- a/cmd/boardvoting/jobs.go
+++ b/cmd/boardvoting/jobs.go
@@ -40,7 +40,8 @@ type RemindVotersJob struct {
 }
 
 func (r *RemindVotersJob) Schedule() {
-	// TODO: check logic. It would make more sense to remind at a specific interval before the next pending decision is closed
+	// TODO: check logic. It would make more sense to remind at a specific interval before the next pending
+	//  decision is closed
 	const reminderDays = 3
 
 	year, month, day := time.Now().UTC().Date()
@@ -235,8 +236,8 @@ func (js *JobScheduler) Schedule() {
 
 	for {
 		select {
-		case jobId := <-js.rescheduleChannel:
-			js.jobs[jobId].Schedule()
+		case jobID := <-js.rescheduleChannel:
+			js.jobs[jobID].Schedule()
 		case <-js.quitChannel:
 			for _, job := range js.jobs {
 				job.Stop()
diff --git a/cmd/boardvoting/middleware.go b/cmd/boardvoting/middleware.go
index 9a51834..b4fdf92 100644
--- a/cmd/boardvoting/middleware.go
+++ b/cmd/boardvoting/middleware.go
@@ -70,6 +70,7 @@ func (app *application) authenticateRequest(r *http.Request) (*models.User, *x50
 	clientCert := r.TLS.PeerCertificates[0]
 
 	allowClientAuth := false
+
 	for _, eku := range clientCert.ExtKeyUsage {
 		if eku == x509.ExtKeyUsageClientAuth {
 			allowClientAuth = true
diff --git a/internal/validator/validator.go b/internal/validator/validator.go
index c5f5780..07f8b32 100644
--- a/internal/validator/validator.go
+++ b/internal/validator/validator.go
@@ -53,6 +53,7 @@ func NotBlank(value string) bool {
 
 func NotNil(value any) bool {
 	val := reflect.ValueOf(value)
+
 	return !val.IsNil()
 }