diff --git a/Use-from-unittest-import-mock-instead-of-just-import.patch b/Use-from-unittest-import-mock-instead-of-just-import.patch
new file mode 100644
index 0000000..02cbc99
--- /dev/null
+++ b/Use-from-unittest-import-mock-instead-of-just-import.patch
@@ -0,0 +1,36 @@
+From f41791d752a7a398b57f88e07bb2871ae533ca1c Mon Sep 17 00:00:00 2001
+From: Mike FABIAN <mfabian@redhat.com>
+Date: Tue, 2 Feb 2021 11:42:49 +0100
+Subject: [PATCH] =?UTF-8?q?Use=20=E2=80=9Cfrom=20unittest=20import=20mock?=
+ =?UTF-8?q?=E2=80=9D=20instead=20of=20just=20=E2=80=9Cimport=20mock?=
+ =?UTF-8?q?=E2=80=9D.?=
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Since Python 3.3, mock is part of unittest in the standard
+library. The third-party `mock` library is a backport for older Python
+versions.
+
+This makes it possible to remove the “BuildRequires:  python3-mock”
+from the ibus-table.spec file.
+---
+ tests/test_it.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tests/test_it.py b/tests/test_it.py
+index a4b6ba6..cad55c1 100755
+--- a/tests/test_it.py
++++ b/tests/test_it.py
+@@ -29,7 +29,7 @@ import logging
+ import time
+ import unittest
+ import importlib
+-import mock
++from unittest import mock
+ 
+ from gi import require_version
+ require_version('IBus', '1.0')
+-- 
+2.29.2
+
diff --git a/ibus-table.spec b/ibus-table.spec
index 191e52a..40c9ff7 100644
--- a/ibus-table.spec
+++ b/ibus-table.spec
@@ -1,10 +1,11 @@
 Name:       ibus-table
 Version:    1.12.4
-Release:    2%{?dist}
+Release:    3%{?dist}
 Summary:    The Table engine for IBus platform
 License:    LGPLv2+
 URL:        http://code.google.com/p/ibus/
 Source0:    http://mfabian.fedorapeople.org/ibus-table/%{name}-%{version}.tar.gz
+Patch0:     Use-from-unittest-import-mock-instead-of-just-import.patch
 Requires:       ibus > 1.3.0
 %{?__python3:Requires: %{__python3}}
 BuildRequires:  gcc
@@ -14,7 +15,6 @@ BuildRequires:  python3-devel
 BuildRequires:  appstream
 BuildRequires:  libappstream-glib
 BuildRequires:  desktop-file-utils
-BuildRequires:  python3-mock
 BuildRequires:  python3-gobject
 BuildRequires:  python3-gobject-base
 BuildRequires:  dbus-x11
@@ -54,6 +54,7 @@ the functionality of the installed %{name} package.
 
 %prep
 %setup -q
+%patch0 -p1 -b .use-standard-library-mock
 
 %build
 export PYTHON=%{__python3}
@@ -147,6 +148,9 @@ fi
 %{_datadir}/installed-tests/%{name}
 
 %changelog
+* Tue Feb 02 2021 Mike FABIAN <mfabian@redhat.com> - 1.12.4-3
+- Use standard library mock
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1.12.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild