diff --git a/backend/internal/api/handlers/certificate_handler_test.go b/backend/internal/api/handlers/certificate_handler_test.go
index ad512005..7816df16 100644
--- a/backend/internal/api/handlers/certificate_handler_test.go
+++ b/backend/internal/api/handlers/certificate_handler_test.go
@@ -61,7 +61,7 @@ func TestCertificateHandler_List(t *testing.T) {
 
 	// Setup in-memory DB
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -86,7 +86,7 @@ func TestCertificateHandler_Upload(t *testing.T) {
 	// Setup
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -131,7 +131,7 @@ func TestCertificateHandler_Delete(t *testing.T) {
 	tmpDir := t.TempDir()
 	// Use WAL mode and busy timeout for better concurrency with race detector
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	// Seed a cert
 	cert := models.SSLCertificate{
@@ -167,7 +167,7 @@ func TestCertificateHandler_Delete(t *testing.T) {
 func TestCertificateHandler_Upload_Errors(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -202,7 +202,7 @@ func TestCertificateHandler_Upload_Errors(t *testing.T) {
 func TestCertificateHandler_Delete_NotFound(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.NotificationProvider{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -222,7 +222,7 @@ func TestCertificateHandler_Delete_NotFound(t *testing.T) {
 func TestCertificateHandler_Delete_InvalidID(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -241,7 +241,7 @@ func TestCertificateHandler_Delete_InvalidID(t *testing.T) {
 func TestCertificateHandler_Upload_InvalidCertificate(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -275,7 +275,7 @@ func TestCertificateHandler_Upload_InvalidCertificate(t *testing.T) {
 func TestCertificateHandler_Upload_MissingKeyFile(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -307,7 +307,7 @@ func TestCertificateHandler_Upload_MissingKeyFile(t *testing.T) {
 func TestCertificateHandler_Upload_MissingName(t *testing.T) {
 	tmpDir := t.TempDir()
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	service := services.NewCertificateService(tmpDir, db)
 	ns := services.NewNotificationService(db)
@@ -345,7 +345,7 @@ func TestCertificateHandler_List_WithCertificates(t *testing.T) {
 	require.NoError(t, os.MkdirAll(caddyDir, 0755))
 
 	db := OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}))
+	require.NoError(t, db.AutoMigrate(&models.SSLCertificate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	// Seed a certificate in DB
 	cert := models.SSLCertificate{
diff --git a/backend/internal/api/handlers/domain_handler_test.go b/backend/internal/api/handlers/domain_handler_test.go
index c36056a3..57a9f519 100644
--- a/backend/internal/api/handlers/domain_handler_test.go
+++ b/backend/internal/api/handlers/domain_handler_test.go
@@ -22,7 +22,7 @@ func setupDomainTestRouter(t *testing.T) (*gin.Engine, *gorm.DB) {
 	dsn := "file:" + t.Name() + "?mode=memory&cache=shared"
 	db, err := gorm.Open(sqlite.Open(dsn), &gorm.Config{})
 	require.NoError(t, err)
-	require.NoError(t, db.AutoMigrate(&models.Domain{}))
+	require.NoError(t, db.AutoMigrate(&models.Domain{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	ns := services.NewNotificationService(db)
 	h := NewDomainHandler(db, ns)
diff --git a/backend/internal/api/handlers/notification_handler_test.go b/backend/internal/api/handlers/notification_handler_test.go
index 348d874a..3d78996a 100644
--- a/backend/internal/api/handlers/notification_handler_test.go
+++ b/backend/internal/api/handlers/notification_handler_test.go
@@ -25,7 +25,7 @@ func setupNotificationTestDB() *gorm.DB {
 	if err != nil {
 		panic("failed to connect to test database")
 	}
-	db.AutoMigrate(&models.Notification{})
+	db.AutoMigrate(&models.Notification{}, &models.NotificationProvider{})
 	return db
 }
 
diff --git a/backend/internal/api/handlers/notification_provider_handler_test.go b/backend/internal/api/handlers/notification_provider_handler_test.go
index 68e6565d..8961de0d 100644
--- a/backend/internal/api/handlers/notification_provider_handler_test.go
+++ b/backend/internal/api/handlers/notification_provider_handler_test.go
@@ -20,7 +20,7 @@ import (
 func setupNotificationProviderTest(t *testing.T) (*gin.Engine, *gorm.DB) {
 	t.Helper()
 	db := handlers.OpenTestDB(t)
-	require.NoError(t, db.AutoMigrate(&models.NotificationProvider{}))
+	require.NoError(t, db.AutoMigrate(&models.NotificationProvider{}, &models.Notification{}))
 
 	service := services.NewNotificationService(db)
 	handler := handlers.NewNotificationProviderHandler(service)
diff --git a/backend/internal/api/handlers/notification_template_handler_test.go b/backend/internal/api/handlers/notification_template_handler_test.go
index 3d49db7b..490a21b4 100644
--- a/backend/internal/api/handlers/notification_template_handler_test.go
+++ b/backend/internal/api/handlers/notification_template_handler_test.go
@@ -20,7 +20,7 @@ func TestNotificationTemplateHandler_CRUDAndPreview(t *testing.T) {
 	t.Helper()
 	db, err := gorm.Open(sqlite.Open("file::memory:?mode=memory&cache=shared"), &gorm.Config{})
 	require.NoError(t, err)
-	require.NoError(t, db.AutoMigrate(&models.NotificationTemplate{}))
+	require.NoError(t, db.AutoMigrate(&models.NotificationTemplate{}, &models.Notification{}, &models.NotificationProvider{}))
 
 	svc := services.NewNotificationService(db)
 	h := NewNotificationTemplateHandler(svc)