diff --git a/qemu/tests/cfg/migrate.cfg b/qemu/tests/cfg/migrate.cfg
index 8ffb7dd6d5bc2449afbe35b8eb9adc9cd2c7ad37..effb6c5e8b7756910c6195e589087ceb3ecf9003 100644
--- a/qemu/tests/cfg/migrate.cfg
+++ b/qemu/tests/cfg/migrate.cfg
@@ -3,7 +3,7 @@
     migration_test_command = help
     migration_bg_command = "cd /tmp; nohup tcpdump -q -i any -t ip host localhost"
     migration_bg_check_command = pgrep tcpdump
-    migration_bg_kill_command = pkill --signal 9 tcpdump
+    migration_bg_kill_command = pkill -9 tcpdump
     kill_vm_on_error = yes
     iterations = 2
     used_mem = 1024
diff --git a/qemu/tests/cfg/multi_host.cfg b/qemu/tests/cfg/multi_host.cfg
index 4cd3066d5e6d949aab778e7de41d42c33dc59800..549b102b4a14185e728a6156690932ed2b59b059 100644
--- a/qemu/tests/cfg/multi_host.cfg
+++ b/qemu/tests/cfg/multi_host.cfg
@@ -17,7 +17,7 @@
             migration_test_command = help
             migration_bg_command = "cd /tmp; nohup tcpdump -q -i any -t ip host localhost"
             migration_bg_check_command = pgrep tcpdump
-            migration_bg_kill_command = pkill --signal 9 tcpdump
+            migration_bg_kill_command = pkill -9 tcpdump
             kill_vm_on_error = yes
             iterations = 2
             used_mem = 1024
diff --git a/qemu/tests/cfg/spice.cfg b/qemu/tests/cfg/spice.cfg
index b59c36ea8f5a8ad0e4ad18c40fa03a33c0afd45b..7d9d03115ab06ad587d4e9a87d9c77878e2deafb 100644
--- a/qemu/tests/cfg/spice.cfg
+++ b/qemu/tests/cfg/spice.cfg
@@ -43,7 +43,7 @@
             migration_test_command = help
             #migration_bg_command = "cd /tmp; nohup tcpdump -q -i any -t ip host localhost"
             #migration_bg_check_command = pgrep tcpdump
-            #migration_bg_kill_command = pkill --signal 9 tcpdump
+            #migration_bg_kill_command = pkill -9 tcpdump
             kill_vm_on_error = yes
             iterations = 2
             used_mem = 1024