diff --git a/system/qtest.c b/system/qtest.c
index e42b83ce67..cf90cd53ad 100644
--- a/system/qtest.c
+++ b/system/qtest.c
@@ -71,6 +71,7 @@ static void *qtest_server_send_opaque;
  *
  * Extra ASCII space characters in command inputs are permitted and ignored.
  * Lines containing only spaces are permitted and ignored.
+ * Lines that start with a '#' character (comments) are permitted and ignored.
  *
  * Valid requests
  * ^^^^^^^^^^^^^^
@@ -370,8 +371,8 @@ static void qtest_process_command(CharFrontend *chr, gchar **words)
         fprintf(qtest_log_fp, "\n");
     }
 
-    if (!command) {
-        /* Input line was blank: ignore it */
+    if (!command || command[0] == '#') {
+        /* Input line was blank or a comment: ignore it */
         return;
     }