diff --git a/tests/test_base.py b/tests/test_base.py
index efa1bc81..a24fb7a4 100644
--- a/tests/test_base.py
+++ b/tests/test_base.py
@@ -62,3 +62,7 @@ def test_is_title(self):
             self.base.title("one"),
             "one"
             )
+
+    def test_set_high_numwords_not_implemented(self):
+        with self.assertRaises(NotImplementedError):
+            self.base.set_high_numwords()