diff --git a/logger/unwrap/unwrap_test.go b/logger/unwrap/unwrap_test.go
new file mode 100644
index 0000000..2402bfd
--- /dev/null
+++ b/logger/unwrap/unwrap_test.go
@@ -0,0 +1,27 @@
+package unwrap_test
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/golang/protobuf/ptypes/wrappers"
+	"go.unistack.org/micro/v3/logger/unwrap"
+)
+
+func TestWrappers(t *testing.T) {
+	type CustomerInfo struct {
+		MainPhone    *wrappers.StringValue `logger:"take"`
+		BankClientId string                `logger:"take"`
+		NullString   sql.NullString        `logger:"take"`
+	}
+
+	c := &CustomerInfo{MainPhone: &wrappers.StringValue{Value: "+712334"}, BankClientId: "12345", NullString: sql.NullString{String: "test"}}
+
+	buf := fmt.Sprintf("%#v", unwrap.Unwrap(c, unwrap.Tagged(true)))
+	cmp := `&unwrap_test.CustomerInfo{MainPhone:(*wrapperspb.StringValue){Value:"+712334"}, BankClientId:"12345", NullString:(sql.NullString){String:"test"}}`
+	if strings.Compare(buf, cmp) != 0 {
+		t.Fatalf("not proper written \n%s\n%s", cmp, buf)
+	}
+}