diff --git a/lib/tests/test_ripemd.py b/lib/tests/test_ripemd.py
new file mode 100644
index 00000000..cc832608
--- /dev/null
+++ b/lib/tests/test_ripemd.py
@@ -0,0 +1,16 @@
+import unittest
+import random
+import hashlib
+
+from lib import ripemd
+
+class Test_RIPEMD160(unittest.TestCase):
+    """ Test pure Python implementation against standard library. """
+
+    def test_ripemd(self):
+        r = random.Random(0)
+        for i in range(128):
+            blob = bytearray([r.randrange(0, 256) for j in range(1024)])
+            h = hashlib.new('ripemd160')
+            h.update(blob)
+            self.assertEqual(h.hexdigest(), ripemd.new(blob).hexdigest())