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-rw-r--r--Lib/test/libregrtest/runtest_mp.py2
-rw-r--r--PCbuild/rt.bat2
-rw-r--r--Tools/scripts/run_tests.py1
3 files changed, 3 insertions, 2 deletions
diff --git a/Lib/test/libregrtest/runtest_mp.py b/Lib/test/libregrtest/runtest_mp.py
index 9604c16..74ac4fa 100644
--- a/Lib/test/libregrtest/runtest_mp.py
+++ b/Lib/test/libregrtest/runtest_mp.py
@@ -41,7 +41,7 @@ def run_test_in_subprocess(testname, ns):
slaveargs = json.dumps(slaveargs)
cmd = [sys.executable, *support.args_from_interpreter_flags(),
- '-X', 'faulthandler',
+ '-u', # Unbuffered stdout and stderr
'-m', 'test.regrtest',
'--slaveargs', slaveargs]
if ns.pgo:
diff --git a/PCbuild/rt.bat b/PCbuild/rt.bat
index 7d4d071..bb89f91 100644
--- a/PCbuild/rt.bat
+++ b/PCbuild/rt.bat
@@ -42,7 +42,7 @@ if "%1"=="-x64" (set prefix=%pcbuild%amd64\) & shift & goto CheckOpts
if NOT "%1"=="" (set regrtestargs=%regrtestargs% %1) & shift & goto CheckOpts
set exe=%prefix%python%suffix%.exe
-set cmd="%exe%" %dashO% -Wd -E -bb -m test %regrtestargs%
+set cmd="%exe%" %dashO% -u -Wd -E -bb -m test %regrtestargs%
if defined qmode goto Qmode
echo Deleting .pyc/.pyo files ...
diff --git a/Tools/scripts/run_tests.py b/Tools/scripts/run_tests.py
index b582e13..3028302 100644
--- a/Tools/scripts/run_tests.py
+++ b/Tools/scripts/run_tests.py
@@ -26,6 +26,7 @@ def is_resource_use_flag(arg):
def main(regrtest_args):
args = [sys.executable,
+ '-u', # Unbuffered stdout and stderr
'-W', 'default', # Warnings set to 'default'
'-bb', # Warnings about bytes/bytearray
'-E', # Ignore environment variables