diff --git a/CHANGES.rst b/CHANGES.rst
index be18f30..665fed2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,8 +1,6 @@
 0.9.0 (unreleased)
 ==================
 
-- Added ``pytest-mock`` as dependency. [#31]
-
 
 0.8.0 (2020-01-16)
 ==================
diff --git a/README.rst b/README.rst
index 6502355..23a98f6 100644
--- a/README.rst
+++ b/README.rst
@@ -26,8 +26,6 @@ The following dependencies are installed by this package:
   comparison of data arrays produced during unit tests.
 * `pytest-filter-subpackage`_, a ``pytest`` plugin that adds a ``-P`` option to
   pytest to filter by sub-package.
-* `pytest-mock`_,  a thin-wrapper around the mock package for easier use
-  with ``pytest``.
 * `pytest-cov`_, a ``pytest`` plugin to measure test coverage.
 * `hypothesis`_, a Python library for property based testing.
 
@@ -38,7 +36,6 @@ The following dependencies are installed by this package:
 .. _pytest-openfiles: https://github.com/astropy/pytest-openfiles
 .. _pytest-arraydiff: https://github.com/astropy/pytest-arraydiff
 .. _pytest-filter-subpackage: https://github.com/astropy/pytest-filter-subpackage
-.. _pytest-mock: https://github.com/pytest-dev/pytest-mock
 .. _pytest-cov: https://github.com/pytest-dev/pytest-cov
 .. _hypothesis: https://hypothesis.readthedocs.io
 
diff --git a/setup.cfg b/setup.cfg
index db1f87c..df38962 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,7 +38,6 @@ install_requires =
     pytest-arraydiff>=0.1
     pytest-filter-subpackage>=0.1
     pytest-cov>=2.0
-    pytest-mock>=2.0
     hypothesis>=5.1
     # We don't include the following for now since it brings in
     # matplotlib as a dependency.