diff --git a/c/reg_test/run b/c/reg_test/run
index 5b8763edf..8582d790c 100755
--- a/c/reg_test/run
+++ b/c/reg_test/run
@@ -40,11 +40,10 @@ if [ "$1" = "--valgrind" ]; then
   # Leak-check the test suite. Needs 'make mlrg' first.
   # ../tools/clean-valg can be used to filter the output.
   path_to_mlr="valgrind --leak-check=full ${path_to_mlr}g"
-fi
-if [ "$1" = "--no-mmap" ]; then
-  # Leak-check the test suite. Needs 'make mlrg' first.
-  # ../tools/clean-valg can be used to filter the output.
+elif [ "$1" = "--no-mmap" ]; then
   path_to_mlr="${path_to_mlr} --no-mmap"
+elif [ "$1" = "--valgrind-no-mmap" ]; then
+  path_to_mlr="valgrind --leak-check=full ${path_to_mlr}g --no-mmap"
 fi
 echo Using mlr executable $path_to_mlr