diff --git a/tests/zfs-tests/cmd/mmap_sync.c b/tests/zfs-tests/cmd/mmap_sync.c
index 226e71be2f57..f9008eeaf31a 100644
--- a/tests/zfs-tests/cmd/mmap_sync.c
+++ b/tests/zfs-tests/cmd/mmap_sync.c
@@ -64,7 +64,7 @@ main(int argc, char *argv[])
 		run_time_mins = atoi(argv[1]);
 	}
 
-	int max_msync_time_ms = 1000;
+	int max_msync_time_ms = 2000;
 	if (argc >= 3) {
 		max_msync_time_ms = atoi(argv[2]);
 	}