diff --git a/lntest/harness_node.go b/lntest/harness_node.go
index 79bacb822..3b1e8bebc 100644
--- a/lntest/harness_node.go
+++ b/lntest/harness_node.go
@@ -609,7 +609,7 @@ func (hn *HarnessNode) startLnd(lndBinary string, lndError chan<- error) error {
 		fileName string
 		err      error
 	)
-	if *logOutput {
+	if *LogOutput {
 		fileName, err = addLogFile(hn)
 		if err != nil {
 			return err
@@ -1843,7 +1843,7 @@ func finalizeLogfile(hn *HarnessNode, fileName string) {
 		hn.logFile.Close()
 
 		// If logoutput flag is not set, return early.
-		if !*logOutput {
+		if !*LogOutput {
 			return
 		}
 
diff --git a/lntest/test_common.go b/lntest/test_common.go
index 3259bf1cb..35adf6604 100644
--- a/lntest/test_common.go
+++ b/lntest/test_common.go
@@ -42,7 +42,9 @@ var (
 
 	// logOutput is a flag that can be set to append the output from the
 	// seed nodes to log files.
-	logOutput = flag.Bool("logoutput", false,
+	//
+	// TODO(yy): remove the export.
+	LogOutput = flag.Bool("logoutput", false,
 		"log output from node n to file output-n.log")
 
 	// logSubDir is the default directory where the logs are written to if