diff --git a/src/main.go b/src/main.go
index d971b8a..b7e1514 100644
--- a/src/main.go
+++ b/src/main.go
@@ -248,7 +248,7 @@ func (t *tester) preProcess() {
 		log.Fatalf("Open db err %v", err)
 	}
 
-	log.Warn("Create new db", mdb)
+	log.Debug("Create new db", mdb)
 
 	if _, err = mdb.Exec(fmt.Sprintf("create database `%s`", t.name)); err != nil {
 		log.Fatalf("Executing create db %s err[%v]", t.name, err)
@@ -538,12 +538,8 @@ func (t *tester) concurrentExecute(querys []query, wg *sync.WaitGroup, errOccure
 	}
 	return
 }
-func (t *tester) loadQueries() ([]query, error) {
-	data, err := ioutil.ReadFile(t.testFileName())
-	if err != nil {
-		return nil, err
-	}
 
+func parseQueryLines(data []byte) []query {
 	seps := bytes.Split(data, []byte("\n"))
 	queries := make([]query, 0, len(seps))
 	newStmt := true
@@ -573,7 +569,16 @@ func (t *tester) loadQueries() ([]query, error) {
 		// if the line has a ; in the end, we will treat new line as the new statement.
 		newStmt = strings.HasSuffix(s, ";")
 	}
+	return queries
+}
 
+func (t *tester) loadQueries() ([]query, error) {
+	data, err := ioutil.ReadFile(t.testFileName())
+	if err != nil {
+		return nil, err
+	}
+
+	queries := parseQueryLines(data)
 	return ParseQueries(queries...)
 }
 
@@ -1072,6 +1077,11 @@ func consumeError() []error {
 func main() {
 	flag.Parse()
 	tests := flag.Args()
+	intLogLevel, err := log.ParseLevel(logLevel)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.SetLevel(intLogLevel)
 	startTime := time.Now()
 
 	if xmlPath != "" {
@@ -1079,19 +1089,19 @@ func main() {
 		if err == nil {
 			err = os.Remove(xmlPath)
 			if err != nil {
-				log.Errorf("drop previous xunit file fail: ", err)
+				log.Errorf("drop previous xunit file fail: %v", err)
 				os.Exit(1)
 			}
 		}
 
 		xmlFile, err = os.Create(xmlPath)
 		if err != nil {
-			log.Errorf("create xunit file fail:", err)
+			log.Errorf("create xunit file fail: %v", err)
 			os.Exit(1)
 		}
 		xmlFile, err = os.OpenFile(xmlPath, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
 		if err != nil {
-			log.Errorf("open xunit file fail:", err)
+			log.Errorf("open xunit file fail: %v", err)
 			os.Exit(1)
 		}
 
@@ -1113,7 +1123,7 @@ func main() {
 				})
 				err := Write(xmlFile, testSuite)
 				if err != nil {
-					log.Errorf("Write xunit file fail:", err)
+					log.Errorf("Write xunit file fail: %v", err)
 				}
 			}
 		}()
diff --git a/src/query_test.go b/src/query_test.go
index bc54a19..7406bc6 100644
--- a/src/query_test.go
+++ b/src/query_test.go
@@ -29,16 +29,16 @@ func assertEqual(t *testing.T, a interface{}, b interface{}, message string) {
 }
 
 func TestParseQueryies(t *testing.T) {
-	query := "select * from t;"
-	if q, err := ParseQueries(query); err == nil {
+	query := []byte("select * from t;")
+	if q, err := ParseQueries(parseQueryLines(query)...); err == nil {
 		assertEqual(t, q[0].tp, Q_QUERY, fmt.Sprintf("Expected: %d, got: %d", Q_QUERY, q[0].tp))
-		assertEqual(t, q[0].Query, query, fmt.Sprintf("Expected: %s, got: %s", query, q[0].Query))
+		assertEqual(t, q[0].Query, string(query), fmt.Sprintf("Expected: %s, got: %s", query, q[0].Query))
 	} else {
 		t.Fatalf("error is not nil. %v", err)
 	}
 
-	query = "--sorted_result select * from t;"
-	if q, err := ParseQueries(query); err == nil {
+	query = []byte("--sorted_result select * from t;")
+	if q, err := ParseQueries(parseQueryLines(query)...); err == nil {
 		assertEqual(t, q[0].tp, Q_SORTED_RESULT, "sorted_result")
 		assertEqual(t, q[0].Query, "select * from t;", fmt.Sprintf("Expected: '%s', got '%s'", "select * from t;", q[0].Query))
 	} else {
@@ -46,8 +46,8 @@ func TestParseQueryies(t *testing.T) {
 	}
 
 	// invalid comment command style
-	query = "--abc select * from t;"
-	_, err := ParseQueries(query)
+	query = []byte("--abc select * from t;")
+	_, err := ParseQueries(parseQueryLines(query)...)
 	assertEqual(t, err, ErrInvalidCommand, fmt.Sprintf("Expected: %v, got %v", ErrInvalidCommand, err))
 
 }
diff --git a/src/xml.go b/src/xml.go
index 12f453a..0f5a13f 100644
--- a/src/xml.go
+++ b/src/xml.go
@@ -63,7 +63,7 @@ func Write(out io.Writer, testSuite XUnitTestSuite) error {
 	testSuites.Suites = append(testSuites.Suites, testSuite)
 	_, err := out.Write([]byte(xml.Header))
 	if err != nil {
-		log.Errorf("write xunit file fail:", err)
+		log.Errorf("write xunit file fail: %v", err)
 		return err
 	}
 	doc, err := xml.MarshalIndent(testSuites, "", "\t")