diff -Nru google_cloud_storage-3.8.0.orig/google/cloud/storage/_media/requests/__init__.py google_cloud_storage-3.8.0/google/cloud/storage/_media/requests/__init__.py
--- google_cloud_storage-3.8.0.orig/google/cloud/storage/_media/requests/__init__.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/google/cloud/storage/_media/requests/__init__.py	2026-01-16 10:59:54.646351819 +0100
@@ -32,7 +32,7 @@
 
    import google.auth
    import google.auth.credentials as creds_mod
-   import mock
+   from unittest import mock
 
    def mock_default(scopes=None):
        credentials = mock.Mock(spec=creds_mod.Credentials)
@@ -68,7 +68,7 @@
 
 .. testsetup:: basic-download
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -111,7 +111,7 @@
 
 .. testsetup:: basic-download-with-slice
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -170,7 +170,7 @@
 
    import io
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -230,7 +230,7 @@
 
 .. testsetup:: chunked-download-end
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -303,7 +303,7 @@
 
    import json
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -363,7 +363,7 @@
 
    import time
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -438,7 +438,7 @@
 
    import json
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -524,7 +524,7 @@
 
    import io
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
@@ -585,7 +585,7 @@
    import io
    import json
 
-   import mock
+   from unittest import mock
    import requests
    import http.client
 
diff -Nru google_cloud_storage-3.8.0.orig/google/cloud/storage/_media/requests/upload.py google_cloud_storage-3.8.0/google/cloud/storage/_media/requests/upload.py
--- google_cloud_storage-3.8.0.orig/google/cloud/storage/_media/requests/upload.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/google/cloud/storage/_media/requests/upload.py	2026-01-16 10:59:54.644082466 +0100
@@ -198,7 +198,7 @@
        import os
        import tempfile
 
-       import mock
+       from unittest import mock
        import requests
        import http.client
 
@@ -255,7 +255,7 @@
 
        import io
 
-       import mock
+       from unittest import mock
        import requests
        import http.client
 
@@ -296,7 +296,7 @@
 
        import io
 
-       import mock
+       from unittest import mock
        import requests
        import http.client
 
@@ -457,7 +457,7 @@
 
            import io
 
-           import mock
+           from unittest import mock
            import requests
            import http.client
 
diff -Nru google_cloud_storage-3.8.0.orig/tests/system/test_blob.py google_cloud_storage-3.8.0/tests/system/test_blob.py
--- google_cloud_storage-3.8.0.orig/tests/system/test_blob.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/system/test_blob.py	2026-01-16 10:59:54.678155512 +0100
@@ -21,7 +21,7 @@
 import warnings
 
 import pytest
-import mock
+from unittest import mock
 
 from google.cloud.storage.exceptions import DataCorruption
 from google.api_core import exceptions
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/gapic/storage_v2/test_storage.py google_cloud_storage-3.8.0/tests/unit/gapic/storage_v2/test_storage.py
--- google_cloud_storage-3.8.0.orig/tests/unit/gapic/storage_v2/test_storage.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/gapic/storage_v2/test_storage.py	2026-01-16 10:59:54.757161041 +0100
@@ -20,7 +20,7 @@
     from unittest import mock
     from unittest.mock import AsyncMock  # pragma: NO COVER
 except ImportError:  # pragma: NO COVER
-    import mock
+    from unittest import mock
 
 import grpc
 from grpc.experimental import aio
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_acl.py google_cloud_storage-3.8.0/tests/unit/test_acl.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_acl.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_acl.py	2026-01-16 10:59:54.769161251 +0100
@@ -14,7 +14,7 @@
 
 import unittest
 
-import mock
+from unittest import mock
 
 from google.cloud.storage.retry import (
     DEFAULT_RETRY,
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_batch.py google_cloud_storage-3.8.0/tests/unit/test_batch.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_batch.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_batch.py	2026-01-16 10:59:54.723595781 +0100
@@ -17,7 +17,7 @@
 from http.client import NO_CONTENT
 import unittest
 
-import mock
+from unittest import mock
 import requests
 
 from google.cloud.storage._helpers import _DEFAULT_UNIVERSE_DOMAIN
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_blob.py google_cloud_storage-3.8.0/tests/unit/test_blob.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_blob.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_blob.py	2026-01-16 10:59:54.711160236 +0100
@@ -24,7 +24,7 @@
 from unittest.mock import patch
 from urllib.parse import urlencode
 
-import mock
+from unittest import mock
 import pytest
 
 from google.cloud.exceptions import NotFound
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_bucket.py google_cloud_storage-3.8.0/tests/unit/test_bucket.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_bucket.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_bucket.py	2026-01-16 10:59:54.767161216 +0100
@@ -15,7 +15,7 @@
 import datetime
 import unittest
 
-import mock
+from unittest import mock
 import pytest
 
 from google.cloud.storage.blob import _quote
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_client.py google_cloud_storage-3.8.0/tests/unit/test_client.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_client.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_client.py	2026-01-16 10:59:54.720694818 +0100
@@ -17,7 +17,7 @@
 import io
 import json
 from unittest.mock import patch
-import mock
+from unittest import mock
 import pytest
 import re
 import requests
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_fileio.py google_cloud_storage-3.8.0/tests/unit/test_fileio.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_fileio.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_fileio.py	2026-01-16 10:59:54.718626447 +0100
@@ -18,7 +18,7 @@
 import io
 import string
 
-import mock
+from unittest import mock
 
 from google.api_core.exceptions import RequestRangeNotSatisfiable
 from google.cloud.storage.fileio import CHUNK_SIZE_MULTIPLE
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test__helpers.py google_cloud_storage-3.8.0/tests/unit/test__helpers.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test__helpers.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test__helpers.py	2026-01-16 10:59:54.716578054 +0100
@@ -14,7 +14,7 @@
 
 import unittest
 
-import mock
+from unittest import mock
 
 from google.cloud.storage.retry import DEFAULT_RETRY
 from google.cloud.storage.retry import DEFAULT_RETRY_IF_METAGENERATION_SPECIFIED
@@ -586,7 +586,7 @@
         self.assertEqual(SIGNED_CONTENT, b"kBiQqOnIz21aGlQrIp/r/w==")
 
     def test_it_with_stubs(self):
-        import mock
+        from unittest import mock
 
         class _Buffer(object):
             def __init__(self, return_vals):
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_hmac_key.py google_cloud_storage-3.8.0/tests/unit/test_hmac_key.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_hmac_key.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_hmac_key.py	2026-01-16 10:59:54.764429205 +0100
@@ -14,7 +14,7 @@
 
 import unittest
 
-import mock
+from unittest import mock
 
 from google.cloud.storage.retry import DEFAULT_RETRY
 from google.cloud.storage.retry import DEFAULT_RETRY_IF_ETAG_IN_JSON
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test__http.py google_cloud_storage-3.8.0/tests/unit/test__http.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test__http.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test__http.py	2026-01-16 10:59:54.704689771 +0100
@@ -15,7 +15,7 @@
 import unittest
 from unittest.mock import patch
 
-import mock
+from unittest import mock
 
 from google.cloud.storage import _helpers
 
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_notification.py google_cloud_storage-3.8.0/tests/unit/test_notification.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_notification.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_notification.py	2026-01-16 10:59:54.706550807 +0100
@@ -14,7 +14,7 @@
 
 import unittest
 
-import mock
+from unittest import mock
 
 from google.cloud.storage.retry import DEFAULT_RETRY
 
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test__opentelemetry_tracing.py google_cloud_storage-3.8.0/tests/unit/test__opentelemetry_tracing.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test__opentelemetry_tracing.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test__opentelemetry_tracing.py	2026-01-16 10:59:54.708494391 +0100
@@ -17,7 +17,7 @@
 import pytest
 import sys
 
-import mock
+from unittest import mock
 from google.api_core.exceptions import GoogleAPICallError
 from google.cloud.storage import __version__
 from google.cloud.storage import _opentelemetry_tracing
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_retry.py google_cloud_storage-3.8.0/tests/unit/test_retry.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_retry.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_retry.py	2026-01-16 10:59:54.746717083 +0100
@@ -17,7 +17,7 @@
 from google.cloud.storage import _helpers
 from google.cloud.storage.exceptions import InvalidResponse
 
-import mock
+from unittest import mock
 
 
 class Test_should_retry(unittest.TestCase):
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test__signing.py google_cloud_storage-3.8.0/tests/unit/test__signing.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test__signing.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test__signing.py	2026-01-16 10:59:54.714434821 +0100
@@ -23,7 +23,7 @@
 import unittest
 import urllib.parse
 
-import mock
+from unittest import mock
 import pytest
 
 from google.cloud.storage._helpers import _UTC
diff -Nru google_cloud_storage-3.8.0.orig/tests/unit/test_transfer_manager.py google_cloud_storage-3.8.0/tests/unit/test_transfer_manager.py
--- google_cloud_storage-3.8.0.orig/tests/unit/test_transfer_manager.py	2026-01-14 01:41:56.000000000 +0100
+++ google_cloud_storage-3.8.0/tests/unit/test_transfer_manager.py	2026-01-16 10:59:54.744589019 +0100
@@ -25,7 +25,7 @@
 
 import os
 import tempfile
-import mock
+from unittest import mock
 import pickle
 
 BLOB_TOKEN_STRING = "blob token"