--- a/test/pydot_unittest.py
+++ b/test/pydot_unittest.py
@@ -142,6 +142,7 @@ class TestGraphAPI(unittest.TestCase):
         self.assertEqual(g2.get_edges()[0].get_source(), node1)
         self.assertEqual(g2.get_edges()[0].get_destination(), node2)

+    @unittest.skip(reason="Known to fail on Gentoo, reported upstream: https://github.com/carlos-jenkins/pydotplus/issues/22")
     def test_graph_with_shapefiles(self):

         shapefile_dir = os.path.join(TEST_DIR, 'from-past-to-future')
@@ -225,6 +226,7 @@ class TestGraphAPI(unittest.TestCase):
     def test_my_regression_tests(self):
         self._render_and_compare_dot_files(MY_REGRESSION_TESTS_DIR)

+    @unittest.skip(reason="Known to fail on Gentoo, reported upstream: https://github.com/carlos-jenkins/pydotplus/issues/22")
     def test_graphviz_regression_tests(self):
         self._render_and_compare_dot_files(REGRESSION_TESTS_DIR)