diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 47d5c9ff7c..e0d486feb1 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -1037,7 +1037,7 @@ DEFINE_BOOL(trace_sim_messages, false,
             "Trace simulator debug messages. Implied by --trace-sim.")
 
 // isolate.cc
-DEFINE_BOOL(async_stack_traces, false,
+DEFINE_BOOL(async_stack_traces, true,
             "include async stack traces in Error.stack")
 DEFINE_IMPLICATION(async_stack_traces, harmony_await_optimization)
 DEFINE_BOOL(stack_trace_on_illegal, false,
diff --git a/test/mjsunit/es8/async-function-stacktrace.js b/test/mjsunit/es8/async-function-stacktrace.js
index 623599ae40..e9358c2679 100644
--- a/test/mjsunit/es8/async-function-stacktrace.js
+++ b/test/mjsunit/es8/async-function-stacktrace.js
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Flags: --noasync-stack-traces
+
 async function test(func, funcs) {
   try {
     await func();