diff --git a/testing/simulator/src/cli.rs b/testing/simulator/src/cli.rs
index 69b679817a3..1ce8b2a5d9b 100644
--- a/testing/simulator/src/cli.rs
+++ b/testing/simulator/src/cli.rs
@@ -34,7 +34,7 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
                         .short("s")
                         .long("speed_up_factor")
                         .takes_value(true)
-                        .default_value("6")
+                        .default_value("3")
                         .help("Speed up factor"))
                     .arg(Arg::with_name("continue_after_checks")
                         .short("c")
@@ -62,7 +62,7 @@ pub fn cli_app<'a, 'b>() -> App<'a, 'b> {
                         .short("s")
                         .long("speed_up_factor")
                         .takes_value(true)
-                        .default_value("6")
+                        .default_value("3")
                         .help("Speed up factor"))
                     .arg(Arg::with_name("continue_after_checks")
                         .short("c")