diff --git a/qemu/tests/cfg/hotplug_mem.cfg b/qemu/tests/cfg/hotplug_mem.cfg
index c7cd069fc0a88ad7cf13e64b1b7c72f6a7958ba7..bc3a35f1e12d8a769c12ca385bdc85e8a4079158 100644
--- a/qemu/tests/cfg/hotplug_mem.cfg
+++ b/qemu/tests/cfg/hotplug_mem.cfg
@@ -5,7 +5,7 @@
 #    guest OS really supported it.
 - hotplug_memory:
     type = hotplug_mem
-    mem_fixed = 1024
+    mem_fixed = 4096
     slots_mem = 4
     size_mem = 1G
     maxmem_mem = 32G
@@ -21,6 +21,24 @@
     ppc64,ppc64le:
         threshold = 0.15
     sub_test_wait_time = 0
+    variants:
+        - @default:
+        - op_on:
+            dump_mem = yes
+            merge_mem = yes
+            prealloc_mem = yes
+            share_mem = yes
+            discard-data = yes
+            only one
+            only no_policy
+        - op_off:
+            dump_mem = no
+            merge_mem = no
+            prealloc_mem = no
+            share_mem = no
+            discard-data = no
+            only one
+            only no_policy
     variants numa_nodes:
         - one:
             guest_numa_nodes = "node0"
@@ -62,6 +80,7 @@
     variants:
         - backend_ram:
             backend_mem = memory-backend-ram
+            del discard-data
         - backend_file:
             # Notes:
             #     Before start testing, please ensure your host