diff --git a/src/libvterm/t/run-test.pl b/src/libvterm/t/run-test.pl
index 4ef0f26..12e1180 100644
--- a/src/libvterm/t/run-test.pl
+++ b/src/libvterm/t/run-test.pl
@@ -16,7 +16,7 @@
 {
    local $ENV{LD_LIBRARY_PATH} = ".libs";
    my @command = "t/.libs/harness";
-   unshift @command, "valgrind", "--quiet", "--error-exitcode=126" if $VALGRIND;
+   unshift @command, "valgrind", "--tool=memcheck", "--leak-check=yes", "--num-callers=25", "--log-file=valgrind.out", "--error-exitcode=126" if $VALGRIND;
 
    $hpid = open2 $hout, $hin, @command or die "Cannot open2 harness - $!";
 }