diff --git a/libcxx/test/support/set_windows_crt_report_mode.h b/libcxx/test/support/set_windows_crt_report_mode.h
--- a/libcxx/test/support/set_windows_crt_report_mode.h
+++ b/libcxx/test/support/set_windows_crt_report_mode.h
@@ -33,9 +33,12 @@
 // that setting and instead changes the assertion handler to log to stderr
 // instead.
 inline int init_crt_report_mode() {
-  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG);
-  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG);
-  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
+  _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
+  _CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
+  _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE);
+  _CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
   return 0;
 }