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-rw-r--r--Lib/test/test_unicode.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index fb7bb2d..c277e70 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -2680,6 +2680,12 @@ class CAPITest(unittest.TestCase):
check_format('%.%s',
b'%.%s', b'abc')
+ # Issue #33817: empty strings
+ check_format('',
+ b'')
+ check_format('',
+ b'%s', b'')
+
# Test PyUnicode_AsWideChar()
@support.cpython_only
def test_aswidechar(self):