diff --git a/tests/dejagnu-smoketest/runtest.sh b/tests/dejagnu-smoketest/runtest.sh
index 11b4d87..d988142 100755
--- a/tests/dejagnu-smoketest/runtest.sh
+++ b/tests/dejagnu-smoketest/runtest.sh
@@ -10,7 +10,7 @@ dnf debuginfo-install -y kernel
 stap -L 'process("stap").mark("*")' | grep pass
 # stap -L 'kernel.trace("sys_enter")'
 stap -v --example helloworld.stp
-stap -v -T 10 -e 'probe kernel.function("do_exit") {println($$vars)}' -c true
+stap -v -T 10 -p4 -e 'probe kernel.function("do_exit") {println($$vars)}'
 # stap -v -T 10 -e 'probe syscall.* ? {println(argstr)}'
 
 echo