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-rw-r--r--Lib/test/test_tools/test_gprof2html.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/test/test_tools/test_gprof2html.py b/Lib/test/test_tools/test_gprof2html.py
index 9489ed9..7cceb8f 100644
--- a/Lib/test/test_tools/test_gprof2html.py
+++ b/Lib/test/test_tools/test_gprof2html.py
@@ -25,7 +25,7 @@ class Gprof2htmlTests(unittest.TestCase):
with mock.patch.object(self.gprof, 'webbrowser') as wmock, \
tempfile.TemporaryDirectory() as tmpdir:
fn = os.path.join(tmpdir, 'abc')
- open(fn, 'w').close()
+ open(fn, 'wb').close()
sys.argv = ['gprof2html', fn]
self.gprof.main()
self.assertTrue(wmock.open.called)