diff --git a/transport/dialer/dialer_test.go b/transport/dialer/dialer_test.go
new file mode 100644
index 00000000..634b2af2
--- /dev/null
+++ b/transport/dialer/dialer_test.go
@@ -0,0 +1,19 @@
+package dialer_test
+
+import (
+	"testing"
+
+	v2net "github.com/v2ray/v2ray-core/common/net"
+	v2testing "github.com/v2ray/v2ray-core/testing"
+	"github.com/v2ray/v2ray-core/testing/assert"
+	. "github.com/v2ray/v2ray-core/transport/dialer"
+)
+
+func TestDialDomain(t *testing.T) {
+	v2testing.Current(t)
+
+	conn, err := Dial(v2net.TCPDestination(v2net.DomainAddress("google.com"), 443))
+	assert.Error(err).IsNil()
+	assert.StringLiteral(conn.RemoteAddr().Network()).Equals("tcp")
+	conn.Close()
+}