diff --git a/python-bibtexparser-remove-unittest2.patch b/python-bibtexparser-remove-unittest2.patch
new file mode 100644
index 0000000..a5a53e3
--- /dev/null
+++ b/python-bibtexparser-remove-unittest2.patch
@@ -0,0 +1,13 @@
+Index: python-bibtexparser-1.1.0/bibtexparser/tests/test_crossref_resolving.py
+===================================================================
+--- python-bibtexparser-1.1.0.orig/bibtexparser/tests/test_crossref_resolving.py	2019-01-17 16:31:34.000000000 +0100
++++ python-bibtexparser-1.1.0/bibtexparser/tests/test_crossref_resolving.py	2020-06-01 11:32:48.246219654 +0200
+@@ -1,4 +1,7 @@
+-import unittest2 as unittest
++try:
++    import unittest2 as unittest
++except ImportError:
++    import unittest
+ from bibtexparser.bibdatabase import BibDatabase
+ from bibtexparser.bparser import BibTexParser
+ 
diff --git a/python-bibtexparser.changes b/python-bibtexparser.changes
index 87494cf..9cbeaa1 100644
--- a/python-bibtexparser.changes
+++ b/python-bibtexparser.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Mon Jun  1 10:15:19 UTC 2020 - pgajdos@suse.com
+
+- unittest2 is not neccessary for python3
+- added patches
+  use unittest2 only if present, fall back to unittest
+  + python-bibtexparser-remove-unittest2.patch
+
 -------------------------------------------------------------------
 Wed Apr 15 10:00:08 UTC 2020 - Matej Cepl <mcepl@suse.com>
 
diff --git a/python-bibtexparser.spec b/python-bibtexparser.spec
index 2aa1ee9..5190e95 100644
--- a/python-bibtexparser.spec
+++ b/python-bibtexparser.spec
@@ -17,6 +17,7 @@
 
 
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
+%bcond_without  python2
 Name:           python-bibtexparser
 Version:        1.1.0
 Release:        0
@@ -25,6 +26,8 @@ License:        LGPL-3.0-only OR BSD-3-Clause
 Group:          Development/Languages/Python
 URL:            https://github.com/sciunto-org/python-bibtexparser
 Source:         https://github.com/sciunto-org/python-bibtexparser/archive/v%{version}.tar.gz#/python-bibtexparser-%{version}.tar.gz
+# https://github.com/sciunto-org/python-bibtexparser/pull/259
+Patch0:         python-bibtexparser-remove-unittest2.patch
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
@@ -36,7 +39,9 @@ BuildArch:      noarch
 BuildRequires:  %{python_module future >= 0.16.0}
 BuildRequires:  %{python_module pyparsing >= 2.0.3}
 BuildRequires:  %{python_module pytest}
-BuildRequires:  %{python_module unittest2}
+%if %{with python2}
+BuildRequires:  python-unittest2
+%endif
 # /SECTION
 %python_subpackages
 
@@ -45,6 +50,7 @@ Python library to parse bibtex files..
 
 %prep
 %setup -q -n python-bibtexparser-%{version}
+%patch0 -p1
 sed -i -e '/^#!\//, 1d' bibtexparser/*.py
 
 %build