diff --git a/generic/tests/cfg/kdump.cfg b/generic/tests/cfg/kdump.cfg
index 5e93cb5202..6c892f619f 100644
--- a/generic/tests/cfg/kdump.cfg
+++ b/generic/tests/cfg/kdump.cfg
@@ -27,9 +27,9 @@
         crashkernel_default_params = 2G-4G:384M,4G-16G:512M,16G-64G:1G,64G-128G:2G,128G-:4G
     s390x:
         crashkernel_default_params = 1G-4G:192M,4G-64G:256M,64G-:512M
+    kernel_param_cmd = "kdumpctl reset-crashkernel --kernel=DEFAULT"
     kdump_enable_cmd = "systemctl enable --now kdump.service"
     kdump_restart_cmd = "systemctl restart kdump.service"
-    kernel_param_cmd = "grubby --update-kernel=`grubby --default-kernel` --args=crashkernel=${crashkernel_default_params}"
     RHEL.5:
         kdump_config = core_collector makedumpfile -c -d 31
     RHEL.6:
@@ -56,9 +56,7 @@
         - @default:
         - nmi:
             no aarch64 s390 s390x
-            kernel_param_cmd = "grubby --update-kernel=`grubby --default-kernel` --args='crashkernel=auto nmi_watchdog=1'"
-            RHEL.9:
-                kernel_param_cmd = "grubby --update-kernel=`grubby --default-kernel` --args='nmi_watchdog=1'"
+            kernel_param_cmd = "grubby --update-kernel=`grubby --default-kernel` --args='nmi_watchdog=1'"
             crash_cmd = nmi
             send_nmi_cmd = "echo 1 > /proc/sys/kernel/unknown_nmi_panic"
             ppc64, ppc64le: