TST: msg on update with duplicate indexes (pandas-dev#55509)

Author: aureliobarbosa

pandas/tests/frame/methods/test_update.py

@@ -211,5 +211,5 @@ def test_update_raises_on_duplicate_argument_index(self):
         # GH#55509
         df = DataFrame({"a": [True, True]}, index=[1, 2])
         other = DataFrame({"a": [False, False]}, index=[1, 1])
-        with pytest.raises(ValueError, match="duplicate argument index"):
+        with pytest.raises(ValueError, match="duplicate index"):
             df.update(other)