diff --git a/requirements.txt b/requirements.txt
index 23cdfd916..0c1cae3f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,6 @@ hypothesis>=3.27.0,<6.72.2
 pytest>=8.2.0
 pytest-cov>=2.7.0,<5.0.0
 coverage>=5.0.0,<8.0.0
-mock>=2.0.0,<3.0.0
 flake8>=3.5.0,<3.6.0
 mypy>=1.5.0,<1.6.0; platform_machine != "aarch64"
 types-mock>=0.1.1
diff --git a/thinc/tests/layers/test_linear.py b/thinc/tests/layers/test_linear.py
index 345669d87..2f2e980fb 100644
--- a/thinc/tests/layers/test_linear.py
+++ b/thinc/tests/layers/test_linear.py
@@ -1,7 +1,8 @@
+from unittest.mock import MagicMock
+
 import numpy
 import pytest
 from hypothesis import given, settings
-from mock import MagicMock
 from numpy.testing import assert_allclose
 
 from thinc.api import SGD, Dropout, Linear, chain
diff --git a/thinc/tests/layers/test_with_debug.py b/thinc/tests/layers/test_with_debug.py
index 3f65a3ac3..3e31c71f0 100644
--- a/thinc/tests/layers/test_with_debug.py
+++ b/thinc/tests/layers/test_with_debug.py
@@ -1,4 +1,4 @@
-from mock import MagicMock
+from unittest.mock import MagicMock
 
 from thinc.api import Linear, with_debug