diff --git a/python-zdaemon.changes b/python-zdaemon.changes
index b332376..8819f13 100644
--- a/python-zdaemon.changes
+++ b/python-zdaemon.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Apr 14 09:34:25 UTC 2022 - pgajdos@suse.com
+
+- do not require python-mock for build
+
 -------------------------------------------------------------------
 Fri Sep 24 07:52:41 UTC 2021 - pgajdos@suse.com
 
diff --git a/python-zdaemon.spec b/python-zdaemon.spec
index 5d3295c..abd3cbc 100644
--- a/python-zdaemon.spec
+++ b/python-zdaemon.spec
@@ -1,7 +1,7 @@
 #
 # spec file
 #
-# Copyright (c) 2021 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -29,7 +29,6 @@ Source:         https://files.pythonhosted.org/packages/source/z/zdaemon/%{modna
 Patch0:         obs-timeout.patch
 BuildRequires:  %{python_module ZConfig}
 BuildRequires:  %{python_module manuel}
-BuildRequires:  %{python_module mock}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module zc.customdoctests}
 BuildRequires:  %{python_module zope.testing}
@@ -65,6 +64,8 @@ rm -rf src/zdaemon.egg-info
 %python_clone -a %{buildroot}%{_bindir}/zdaemon
 
 %check
+# https://github.com/zopefoundation/zdaemon/issues/28
+sed -i 's:import mock:from unittest import mock:' src/zdaemon/tests/testuser.py
 pushd src
 %pyunittest discover -v