diff --git a/python-pyclipper.changes b/python-pyclipper.changes
index 7ae18ba..5642fdf 100644
--- a/python-pyclipper.changes
+++ b/python-pyclipper.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Jun 10 16:20:24 UTC 2020 - Matej Cepl <mcepl@suse.com>
+
+- Explain necessity of unittest2 for python2
+
 -------------------------------------------------------------------
 Tue Jun  2 15:03:59 UTC 2020 - pgajdos@suse.com
 
diff --git a/python-pyclipper.spec b/python-pyclipper.spec
index 854b668..e9e3099 100644
--- a/python-pyclipper.spec
+++ b/python-pyclipper.spec
@@ -34,6 +34,7 @@ BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools_scm}
 BuildRequires:  %{python_module setuptools}
 %if %{with python2}
+# Required because of otherwise missing assertWarns
 BuildRequires:  python2-unittest2
 %endif
 BuildRequires:  fdupes