diff --git a/tests/testStopper.py b/tests/testStopper.py
new file mode 100644
index 0000000..eea13b4
--- /dev/null
+++ b/tests/testStopper.py
@@ -0,0 +1,42 @@
+"""Tests for the C version of the StopWordRemover."""
+
+import unittest
+
+from Products.ZCTextIndex import stopper
+
+
+class StopperTest(unittest.TestCase):
+    def test_constructor_empty(self):
+        s = stopper.new()
+        self.assertEqual(s.dict, {})
+
+    def test_constructor_dict(self):
+        d = {}
+        s = stopper.new(d)
+        self.assert_(s.dict is d)
+
+    def test_constructor_error(self):
+        self.assertRaises(TypeError, stopper.new, [])
+        self.assertRaises(TypeError, stopper.new, {}, 'extra arg')
+
+    def test_process_nostops(self):
+        s = stopper.new()
+        words = ['a', 'b', 'c', 'splat!']
+        self.assertEqual(words, s.process(words))
+
+    def test_process_somestops(self):
+        s = stopper.new({'b':1, 'splat!':1})
+        words = ['a', 'b', 'c', 'splat!']
+        self.assertEqual(['a', 'c'], s.process(words))
+
+    def test_process_allstops(self):
+        s = stopper.new({'a':1, 'b':1, 'c':1, 'splat!':1})
+        words = ['a', 'b', 'c', 'splat!']
+        self.assertEqual([], s.process(words))
+
+
+def test_suite():
+    return unittest.makeSuite(StopperTest)
+
+if __name__ == "__main__":
+    unittest.main(defaultTest='test_suite')