--- /dev/null
+#include <ccan/tal/str/str.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <ccan/tal/str/str.c>
+#include <ccan/tap/tap.h>
+#include "helper.h"
+
+int main(int argc, char *argv[])
+{
+ char *str, *copy;
+
+ plan_tests(1);
+ str = malloc(5);
+ memcpy(str, "hello", 5);
+ /* We should be fine to strndup src without nul terminator. */
+ copy = tal_strndup(NULL, str, 5);
+ ok1(!strcmp(copy, "hello"));
+ tal_free(copy);
+ free(str);
+
+ return exit_status();
+}