diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
index bf3dbda901..bdfc92cd6e 100644
--- a/src/backend/access/transam/xlog.c
+++ b/src/backend/access/transam/xlog.c
@@ -6126,6 +6126,19 @@ StartupXLOG(void)
 	Insert->fullPageWrites = lastFullPageWrites;
 	UpdateFullPageWrites();
 
+	/*
+	 * Code below is for test purposes only to reveal possible timeline issue.
+	 */
+	{
+		struct stat st;
+
+		elog(LOG, "Start delay in StartupXLOG()");
+
+		while (stat("delay_recovery.signal", &st) == 0)
+			pg_usleep(10000L); /* sleep for 10 ms*/
+
+		elog(LOG, "Stop delay in StartupXLOG()");
+	}
 	/*
 	 * Emit checkpoint or end-of-recovery record in XLOG, if required.
 	 */