update test

Author: jorisvandenbossche

pandas/tests/arrays/string_/test_string.py

@@ -102,10 +102,7 @@ def test_setitem_validates(cls, dtype):
     with pytest.raises(TypeError, match=msg):
         arr[0] = 10
 
-    if dtype.storage == "python":
-        msg = "Must provide strings."
-    else:
-        msg = "Scalar must be NA or str"
+    msg = "Must provide strings"
     with pytest.raises(TypeError, match=msg):
         arr[:] = np.array([1, 2])