diff --git a/tests/libtest.sh b/tests/libtest.sh
index 16d5c0e07f..2d064299cb 100755
--- a/tests/libtest.sh
+++ b/tests/libtest.sh
@@ -80,7 +80,14 @@ fi
 if test -n "${OT_TESTS_VALGRIND:-}"; then
     CMD_PREFIX="env G_SLICE=always-malloc OSTREE_SUPPRESS_SYNCFS=1 valgrind -q --error-exitcode=1 --leak-check=full --num-callers=30 --suppressions=${test_srcdir}/glib.supp --suppressions=${test_srcdir}/ostree.supp"
 else
-    CMD_PREFIX="env LD_PRELOAD=${test_builddir}/libreaddir-rand.so"
+    # In some cases the LD_PRELOAD may cause obscure problems,
+    # e.g. right now it breaks for me with -fsanitize=address, so
+    # let's allow users to skip it.
+    if test -z "${OT_SKIP_READDIR_RAND:-}"; then
+	CMD_PREFIX="env LD_PRELOAD=${test_builddir}/libreaddir-rand.so"
+    else
+	CMD_PREFIX=""
+    fi
 fi
 
 assert_streq () {