diff --git a/lib/PerconaTest.pm b/lib/PerconaTest.pm
index 932ae4cd..4392541b 100644
--- a/lib/PerconaTest.pm
+++ b/lib/PerconaTest.pm
@@ -823,7 +823,7 @@ sub get_cmd_pid {
    my $cmd = shift;
    $cmd =~ s/\./\\./g;
    $cmd =~ s/-/\\-/g;
-   my $output = `ps wx | grep -v grep | grep '$cmd'`;
+   my $output = `ps xww | grep -v grep | grep '$cmd'`;
    my @cmds = $output =~ m/\n/g;
    if ( @cmds > 1 ) {
       die "Found " . scalar @cmds . " commands matching '$cmd': @cmds";
diff --git a/t/lib/Daemon.t b/t/lib/Daemon.t
index 5101a022..4ac90ebe 100644
--- a/t/lib/Daemon.t
+++ b/t/lib/Daemon.t
@@ -143,7 +143,7 @@ SKIP: {
    PerconaTest::wait_for_files($pid_file, $log_file)
       or die "$cmd did not create $pid_file and $log_file";
    my $pid = PerconaTest::get_cmd_pid("$cmd 15")
-      or die "Cannot get PID of $cmd 15\n" . `ps xw`;
+      or die "Cannot get PID of $cmd 15\n" . `ps xww`;
    my $proc_fd_0 = -l "/proc/$pid/0"    ? "/proc/$pid/0"
                  : -l "/proc/$pid/fd/0" ? "/proc/$pid/fd/0"
                  : die "Cannot find fd 0 symlink in /proc/$pid";