TST: Fix unsigned pyarrow types in SIGNED_INT_PYARROW_DTYPES

pandas/_testing/__init__.py

@@ -199,7 +199,7 @@
     import pyarrow as pa
 
     UNSIGNED_INT_PYARROW_DTYPES = [pa.uint8(), pa.uint16(), pa.uint32(), pa.uint64()]
-    SIGNED_INT_PYARROW_DTYPES = [pa.uint8(), pa.int16(), pa.int32(), pa.uint64()]
+    SIGNED_INT_PYARROW_DTYPES = [pa.int8(), pa.int16(), pa.int32(), pa.int64()]
     ALL_INT_PYARROW_DTYPES = UNSIGNED_INT_PYARROW_DTYPES + SIGNED_INT_PYARROW_DTYPES
 
     FLOAT_PYARROW_DTYPES = [pa.float32(), pa.float64()]

pandas/tests/extension/test_arrow.py

@@ -1619,6 +1619,13 @@ def test_add_series_with_extension_array(self, data, request):
                     reason=f"add_checked not implemented for {pa_dtype}",
                 )
             )
+        elif pa_dtype.equals("int8"):
+            request.node.add_marker(
+                pytest.mark.xfail(
+                    raises=pa.ArrowInvalid,
+                    reason=f"raises on overflow for {pa_dtype}",
+                )
+            )
         super().test_add_series_with_extension_array(data)