diff --git a/test/regress.h b/test/regress.h
index 643b82ba..43cb4eaf 100644
--- a/test/regress.h
+++ b/test/regress.h
@@ -95,6 +95,7 @@ extern int libevent_tests_running_in_debug_mode;
 #define TT_NO_LOGS		(TT_FIRST_USER_FLAG<<5)
 #define TT_ENABLE_IOCP_FLAG	(TT_FIRST_USER_FLAG<<6)
 #define TT_ENABLE_IOCP		(TT_ENABLE_IOCP_FLAG|TT_NEED_THREADS)
+#define TT_ENABLE_DEBUG_MODE	(TT_ENABLE_IOCP_FLAG<<7)
 
 /* All the flags that a legacy test needs. */
 #define TT_ISOLATED TT_FORK|TT_NEED_SOCKETPAIR|TT_NEED_BASE
diff --git a/test/regress_main.c b/test/regress_main.c
index c9372825..07f25678 100644
--- a/test/regress_main.c
+++ b/test/regress_main.c
@@ -197,6 +197,11 @@ basic_test_setup(const struct testcase_t *testcase)
 	if (testcase->flags & TT_ENABLE_IOCP_FLAG)
 		return (void*)TT_SKIP;
 #endif
+	
+	if (testcase->flags & TT_ENABLE_DEBUG_MODE) {
+		event_enable_debug_mode();
+		libevent_tests_running_in_debug_mode = 1;
+	}
 
 	if (testcase->flags & TT_NEED_THREADS) {
 		if (!(testcase->flags & TT_FORK))