+extern bool (*failtest_exit_check)(struct tlist_calls *history);
+
+/**
+ * failtest_has_failed - determine if a failure has occurred.
+ *
+ * Sometimes you want to exit immediately if you've experienced an
+ * injected failure. This is useful when you have four separate tests
+ * in your test suite, and you don't want to do the next one if you've
+ * had a failure in a previous one.
+ */
+extern bool failtest_has_failed(void);