diff --git a/tests/sentinel/tests/12-master-reboot.tcl b/tests/sentinel/tests/12-master-reboot.tcl
index 1fdd91d6a..5779316a3 100644
--- a/tests/sentinel/tests/12-master-reboot.tcl
+++ b/tests/sentinel/tests/12-master-reboot.tcl
@@ -40,7 +40,7 @@ test "Master reboot in very short time" {
     set addr [S 0 SENTINEL GET-MASTER-ADDR-BY-NAME mymaster]
     assert {[lindex $addr 1] == $old_port}
     
-    R $master_id debug populate 10000
+    R $master_id debug populate 20000
     R $master_id bgsave
     R $master_id config set key-load-delay 1500
     R $master_id config set loading-process-events-interval-bytes 1024
@@ -63,6 +63,10 @@ test "Master reboot in very short time" {
         }
     }
 
+    # Reset configuration to avoid unnecessary delays
+    R $master_id config set key-load-delay 0
+    R $master_id config rewrite
+
     set addr [S 0 SENTINEL GET-MASTER-ADDR-BY-NAME mymaster]
     set master_id [get_instance_id_by_port redis [lindex $addr 1]]