diff --git a/python/generate_stubs.py b/python/generate_stubs.py
index 9bb80ecf..7568e8e9 100644
--- a/python/generate_stubs.py
+++ b/python/generate_stubs.py
@@ -23,6 +23,7 @@ GENERICS = {
     "iterable": _path_to_type("typing", "Iterable"),
     "iterator": _path_to_type("typing", "Iterator"),
     "list": _path_to_type("typing", "List"),
+    "io": _path_to_type("typing", "IO"),
 }
 OBJECT_MEMBERS = dict(inspect.getmembers(object))
 
diff --git a/python/src/io.rs b/python/src/io.rs
index 38667825..64b1b028 100644
--- a/python/src/io.rs
+++ b/python/src/io.rs
@@ -32,7 +32,7 @@ pub fn add_to_module(module: &PyModule) -> PyResult<()> {
 /// and ``application/xml`` for `RDF/XML <https://www.w3.org/TR/rdf-syntax-grammar/>`_.
 ///
 /// :param input: The binary I/O object or file path to read from. For example, it could be a file path as a string or a file reader opened in binary mode with ``open('my_file.ttl', 'rb')``.
-/// :type input: io.RawIOBase or io.BufferedIOBase or io.TextIOBase or str
+/// :type input: io(bytes) or io(str) or str
 /// :param mime_type: the MIME type of the RDF serialization.
 /// :type mime_type: str
 /// :param base_iri: the base IRI used to resolve the relative IRIs in the file or :py:const:`None` if relative IRI resolution should not be done.
@@ -105,7 +105,7 @@ pub fn parse(
 /// :param input: the RDF triples and quads to serialize.
 /// :type input: iterable(Triple) or iterable(Quad)
 /// :param output: The binary I/O object or file path to write to. For example, it could be a file path as a string or a file writer opened in binary mode with ``open('my_file.ttl', 'wb')``.
-/// :type output: io.RawIOBase or io.BufferedIOBase or str
+/// :type output: io(bytes) or str
 /// :param mime_type: the MIME type of the RDF serialization.
 /// :type mime_type: str
 /// :rtype: None
diff --git a/python/src/store.rs b/python/src/store.rs
index b73972da..8ae81d43 100644
--- a/python/src/store.rs
+++ b/python/src/store.rs
@@ -266,7 +266,7 @@ impl PyStore {
     /// and ``application/xml`` for `RDF/XML <https://www.w3.org/TR/rdf-syntax-grammar/>`_.
     ///
     /// :param input: The binary I/O object or file path to read from. For example, it could be a file path as a string or a file reader opened in binary mode with ``open('my_file.ttl', 'rb')``.
-    /// :type input: io.RawIOBase or io.BufferedIOBase or io.TextIOBase or str
+    /// :type input: io(bytes) or io(str) or str
     /// :param mime_type: the MIME type of the RDF serialization.
     /// :type mime_type: str
     /// :param base_iri: the base IRI used to resolve the relative IRIs in the file or :py:const:`None` if relative IRI resolution should not be done.
@@ -350,7 +350,7 @@ impl PyStore {
     /// and ``application/xml`` for `RDF/XML <https://www.w3.org/TR/rdf-syntax-grammar/>`_.
     ///
     /// :param input: The binary I/O object or file path to read from. For example, it could be a file path as a string or a file reader opened in binary mode with ``open('my_file.ttl', 'rb')``.
-    /// :type input: io.RawIOBase or io.BufferedIOBase or io.TextIOBase or str
+    /// :type input: io(bytes) or io(str) or str
     /// :param mime_type: the MIME type of the RDF serialization.
     /// :type mime_type: str
     /// :param base_iri: the base IRI used to resolve the relative IRIs in the file or :py:const:`None` if relative IRI resolution should not be done.
@@ -431,7 +431,7 @@ impl PyStore {
     /// and ``application/xml`` for `RDF/XML <https://www.w3.org/TR/rdf-syntax-grammar/>`_.
     ///
     /// :param output: The binary I/O object or file path to write to. For example, it could be a file path as a string or a file writer opened in binary mode with ``open('my_file.ttl', 'wb')``.
-    /// :type output: io.RawIOBase or io.BufferedIOBase or str
+    /// :type output: io(bytes) or str
     /// :param mime_type: the MIME type of the RDF serialization.
     /// :type mime_type: str
     /// :param from_graph: if a triple based format is requested, the store graph from which dump the triples. By default, the default graph is used.
diff --git a/python/tests/test_io.py b/python/tests/test_io.py
index 93204942..004dd3e7 100644
--- a/python/tests/test_io.py
+++ b/python/tests/test_io.py
@@ -1,6 +1,6 @@
 import unittest
-from io import StringIO, BytesIO, RawIOBase
-from tempfile import NamedTemporaryFile
+from io import StringIO, BytesIO, UnsupportedOperation
+from tempfile import NamedTemporaryFile, TemporaryFile
 
 from pyoxigraph import *
 
@@ -49,11 +49,9 @@ class TestParse(unittest.TestCase):
         )
 
     def test_parse_io_error(self) -> None:
-        class BadIO(RawIOBase):
-            pass
-
-        with self.assertRaises(NotImplementedError) as _:
-            list(parse(BadIO(), mime_type="application/n-triples"))
+        with self.assertRaises(UnsupportedOperation) as _:
+            with TemporaryFile("wb") as fp:
+                list(parse(fp, mime_type="application/n-triples"))
 
 
 class TestSerialize(unittest.TestCase):
@@ -71,3 +69,8 @@ class TestSerialize(unittest.TestCase):
             self.assertEqual(
                 fp.read(), b'<http://example.com/foo> <http://example.com/p> "1" .\n'
             )
+
+    def test_serialize_io_error(self) -> None:
+        with self.assertRaises(UnsupportedOperation) as _:
+            with TemporaryFile("rb") as fp:
+                serialize([EXAMPLE_TRIPLE], fp, "text/turtle")
diff --git a/python/tests/test_model.py b/python/tests/test_model.py
index e84322a4..b879cefb 100644
--- a/python/tests/test_model.py
+++ b/python/tests/test_model.py
@@ -1,4 +1,5 @@
 import unittest
+
 from pyoxigraph import *
 
 XSD_STRING = NamedNode("http://www.w3.org/2001/XMLSchema#string")
diff --git a/python/tests/test_store.py b/python/tests/test_store.py
index a8ac1e0b..aab3d648 100644
--- a/python/tests/test_store.py
+++ b/python/tests/test_store.py
@@ -1,10 +1,10 @@
 import os
 import unittest
-from io import BytesIO, RawIOBase
+from io import BytesIO, UnsupportedOperation
+from tempfile import NamedTemporaryFile, TemporaryFile
 from typing import Any
 
 from pyoxigraph import *
-from tempfile import NamedTemporaryFile
 
 foo = NamedNode("http://foo")
 bar = NamedNode("http://bar")
@@ -241,11 +241,9 @@ class TestStore(unittest.TestCase):
         self.assertEqual(set(store), {Quad(foo, bar, baz, graph)})
 
     def test_load_with_io_error(self) -> None:
-        class BadIO(RawIOBase):
-            pass
-
-        with self.assertRaises(NotImplementedError) as _:
-            Store().load(BadIO(), mime_type="application/n-triples")
+        with self.assertRaises(UnsupportedOperation) as _:
+            with TemporaryFile("wb") as fp:
+                Store().load(fp, mime_type="application/n-triples")
 
     def test_dump_ntriples(self) -> None:
         store = Store()
@@ -281,11 +279,9 @@ class TestStore(unittest.TestCase):
         )
 
     def test_dump_with_io_error(self) -> None:
-        class BadIO(RawIOBase):
-            pass
-
         with self.assertRaises(OSError) as _:
-            Store().dump(BadIO(), mime_type="application/rdf+xml")
+            with TemporaryFile("rb") as fp:
+                Store().dump(fp, mime_type="application/rdf+xml")
 
     def test_write_in_read(self) -> None:
         store = Store()