Use pytest-expect on python3 (#1593231)

python-html5lib.spec

@@ -47,6 +47,7 @@ BuildRequires:    python3-setuptools
 # Test deps
 BuildRequires:  python3-mock
 BuildRequires:  python3-pytest
+BuildRequires:  python3-pytest-expect
 BuildRequires:  python3-six
 BuildRequires:  python3-webencodings
 
@@ -76,7 +77,10 @@ specification for maximum compatibility with major desktop web browsers.
 
 
 %check
-# we don't have pytest-expect, this is hack, TODO: package pytest-expect
+# we have python3-pytest-expect, so python3 tests first
+%{__python3} -m pytest
+
+# we don't have python2-pytest-expect, this is a workaround
 sed -i \
   -e 's/config.option.update_xfail/False/' \
   -e 's/^fail_if_missing_pytest_expect.*//' \
@@ -86,10 +90,9 @@ sed -i \
 mv html5lib/tests/testdata{,_nope}
 mkdir -p html5lib/tests/testdata/encoding/chardet/
 cp html5lib/tests/testdata{_nope,}/encoding/chardet/test_big5.txt
-# hack ends here
+# workaround ends here
 
 %{__python2} -m pytest
-%{__python3} -m pytest
 
 
 %files -n python2-%{srcname}