diff --git a/python-calmjs.changes b/python-calmjs.changes
index a6fe645..83325be 100644
--- a/python-calmjs.changes
+++ b/python-calmjs.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Jan 14 15:04:12 UTC 2020 - pgajdos@suse.com
+
+- fix build in SLE-15: set en_US.UTF-8 encoding
+- %check the package
+
 -------------------------------------------------------------------
 Mon Jan  6 15:32:29 UTC 2020 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/python-calmjs.spec b/python-calmjs.spec
index c29866c..d9e2a26 100644
--- a/python-calmjs.spec
+++ b/python-calmjs.spec
@@ -29,6 +29,10 @@ BuildRequires:  %{python_module calmjs.types}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
+# SECTION test requirements
+BuildRequires:  %{python_module pytest}
+BuildRequires:  nodejs-common
+# /SECTION
 Requires:       python-calmjs.parse >= 1.0.0
 Requires:       python-calmjs.types
 Requires(post): update-alternatives
@@ -48,9 +52,11 @@ rm src/calmjs/tests/test_npm.py
 rm src/calmjs/tests/test_yarn.py
 
 %build
+LANG=en_US.UTF-8
 %python_build
 
 %install
+LANG=en_US.UTF-8
 %python_install
 %python_clone -a %{buildroot}%{_bindir}/calmjs
 %python_expand rm -r %{buildroot}%{$python_sitelib}/calmjs/testing
@@ -58,14 +64,13 @@ rm src/calmjs/tests/test_yarn.py
 %python_expand %fdupes %{buildroot}%{$python_sitelib}
 
 %check
-#export LANG=en_US.UTF8
-#%%{python_expand #first link the stuff for the weird layout
-#ln -s %{$python_sitelib}/calmjs/types src/calmjs/
-#ln -s %{$python_sitelib}/calmjs/parse src/calmjs/
-#pushd src
-#$python -m unittest calmjs.tests.make_suite -v
-#popd
-#}
+pushd src
+%if 0%{?suse_version} > 1500
+%pytest -k 'not (test_setup_egg_info or test_build_calmjs_artifact)'
+%else
+%python_expand $python -m pytest -k 'not (test_setup_egg_info or test_build_calmjs_artifact)'
+%endif
+popd
 
 %post
 %python_install_alternative calmjs