diff --git a/supply-api/internal/adapter/account_integration_test.go b/supply-api/internal/adapter/account_integration_test.go
new file mode 100644
index 00000000..83240c37
--- /dev/null
+++ b/supply-api/internal/adapter/account_integration_test.go
@@ -0,0 +1,175 @@
+//go:build integration
+// +build integration
+
+package adapter
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"lijiaoqiao/supply-api/internal/audit"
+	"lijiaoqiao/supply-api/internal/domain"
+	"lijiaoqiao/supply-api/internal/repository"
+)
+
+func getIntegrationDB(t *testing.T) *pgxpool.Pool {
+	t.Helper()
+
+	host := os.Getenv("SUPPLY_API_DB_HOST")
+	if host == "" {
+		host = "/var/run/postgresql"
+	}
+	port := os.Getenv("SUPPLY_API_DB_PORT")
+	if port == "" {
+		port = "5432"
+	}
+	user := os.Getenv("SUPPLY_API_DB_USER")
+	if user == "" {
+		user = "long"
+	}
+	password := os.Getenv("SUPPLY_API_DB_PASSWORD")
+	dbName := os.Getenv("SUPPLY_API_DB_NAME")
+	if dbName == "" {
+		dbName = "supply_test"
+	}
+
+	var dsn string
+	if host[0] == '/' {
+		dsn = "postgres://" + user + ":" + password + "@/" + dbName + "?host=" + host + "&sslmode=disable"
+	} else {
+		dsn = "postgres://" + user + ":" + password + "@" + host + ":" + port + "/" + dbName + "?sslmode=disable"
+	}
+
+	pool, err := pgxpool.New(context.Background(), dsn)
+	if err != nil {
+		t.Skipf("跳过集成测试：无法连接数据库: %v", err)
+		return nil
+	}
+	if err := pool.Ping(context.Background()); err != nil {
+		pool.Close()
+		t.Skipf("跳过集成测试：无法 ping 数据库: %v", err)
+		return nil
+	}
+
+	t.Cleanup(func() {
+		pool.Close()
+	})
+	return pool
+}
+
+func createAdapterIntegrationAccount(t *testing.T, repo *repository.AccountRepository, supplierID int64, status domain.AccountStatus) *domain.Account {
+	t.Helper()
+
+	account := &domain.Account{
+		SupplierID:     supplierID,
+		Provider:       domain.ProviderOpenAI,
+		AccountType:    domain.AccountTypeAPIKey,
+		Alias:          t.Name(),
+		Status:         status,
+		RiskLevel:      "low",
+		TotalQuota:     1000,
+		AvailableQuota: 1000,
+		Version:        1,
+		CreatedAt:      time.Now(),
+		UpdatedAt:      time.Now(),
+	}
+
+	if err := repo.Create(context.Background(), account, "", "", ""); err != nil {
+		t.Fatalf("创建测试账号失败: %v", err)
+	}
+
+	return account
+}
+
+func TestDBAccountStore_Activate_Integration(t *testing.T) {
+	if testing.Short() {
+		t.Skip("跳过集成测试（short mode）")
+	}
+
+	pool := getIntegrationDB(t)
+	if pool == nil {
+		return
+	}
+
+	repo := repository.NewAccountRepository(pool)
+	store := NewDBAccountStore(repo)
+	service := domain.NewAccountService(store, audit.NewMemoryAuditStore())
+	supplierID := time.Now().UnixNano()
+	account := createAdapterIntegrationAccount(t, repo, supplierID, domain.AccountStatusPending)
+
+	before, err := repo.GetByID(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("激活前读取账号失败: %v", err)
+	}
+
+	activated, err := service.Activate(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("激活账号失败: %v", err)
+	}
+
+	if activated.Status != domain.AccountStatusActive {
+		t.Fatalf("expected activated status %q, got %q", domain.AccountStatusActive, activated.Status)
+	}
+	if activated.Version != before.Version+1 {
+		t.Fatalf("expected activated version %d, got %d", before.Version+1, activated.Version)
+	}
+
+	after, err := repo.GetByID(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("激活后读取账号失败: %v", err)
+	}
+	if after.Status != domain.AccountStatusActive {
+		t.Fatalf("expected persisted status %q, got %q", domain.AccountStatusActive, after.Status)
+	}
+	if after.Version != before.Version+1 {
+		t.Fatalf("expected persisted version %d, got %d", before.Version+1, after.Version)
+	}
+}
+
+func TestDBAccountStore_Suspend_Integration(t *testing.T) {
+	if testing.Short() {
+		t.Skip("跳过集成测试（short mode）")
+	}
+
+	pool := getIntegrationDB(t)
+	if pool == nil {
+		return
+	}
+
+	repo := repository.NewAccountRepository(pool)
+	store := NewDBAccountStore(repo)
+	service := domain.NewAccountService(store, audit.NewMemoryAuditStore())
+	supplierID := time.Now().UnixNano()
+	account := createAdapterIntegrationAccount(t, repo, supplierID, domain.AccountStatusActive)
+
+	before, err := repo.GetByID(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("暂停前读取账号失败: %v", err)
+	}
+
+	suspended, err := service.Suspend(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("暂停账号失败: %v", err)
+	}
+
+	if suspended.Status != domain.AccountStatusSuspended {
+		t.Fatalf("expected suspended status %q, got %q", domain.AccountStatusSuspended, suspended.Status)
+	}
+	if suspended.Version != before.Version+1 {
+		t.Fatalf("expected suspended version %d, got %d", before.Version+1, suspended.Version)
+	}
+
+	after, err := repo.GetByID(context.Background(), supplierID, account.ID)
+	if err != nil {
+		t.Fatalf("暂停后读取账号失败: %v", err)
+	}
+	if after.Status != domain.AccountStatusSuspended {
+		t.Fatalf("expected persisted status %q, got %q", domain.AccountStatusSuspended, after.Status)
+	}
+	if after.Version != before.Version+1 {
+		t.Fatalf("expected persisted version %d, got %d", before.Version+1, after.Version)
+	}
+}
diff --git a/supply-api/internal/adapter/adapter.go b/supply-api/internal/adapter/adapter.go
index 76828ec0..ecffc6c7 100644
--- a/supply-api/internal/adapter/adapter.go
+++ b/supply-api/internal/adapter/adapter.go
@@ -148,7 +148,11 @@ func (s *DBAccountStore) GetByID(ctx context.Context, supplierID, id int64) (*do
 }
 
 func (s *DBAccountStore) Update(ctx context.Context, account *domain.Account) error {
-	return s.repo.Update(ctx, account, account.Version)
+	expectedVersion := 0
+	if account.Version > 0 {
+		expectedVersion = account.Version - 1
+	}
+	return s.repo.Update(ctx, account, expectedVersion)
 }
 
 func (s *DBAccountStore) List(ctx context.Context, supplierID int64) ([]*domain.Account, error) {