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-rw-r--r--Lib/test/test_builtin.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
index 6fa5ea6..8c9c1e5 100644
--- a/Lib/test/test_builtin.py
+++ b/Lib/test/test_builtin.py
@@ -2072,6 +2072,11 @@ class TestBreakpoint(unittest.TestCase):
breakpoint()
mock.assert_not_called()
+ def test_runtime_error_when_hook_is_lost(self):
+ del sys.breakpointhook
+ with self.assertRaises(RuntimeError):
+ breakpoint()
+
@unittest.skipUnless(pty, "the pty and signal modules must be available")
class PtyTests(unittest.TestCase):