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diff --git a/lib/Crypto/SelfTest/Util/test_Counter.py b/lib/Crypto/SelfTest/Util/test_Counter.py
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+++ b/lib/Crypto/SelfTest/Util/test_Counter.py
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+# -*- coding: utf-8 -*-
+#
+#  SelfTest/Util/test_Counter: Self-test for the Crypto.Util.Counter module
+#
+# Written in 2009 by Dwayne C. Litzenberger <dlitz@dlitz.net>
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+"""Self-tests for Crypto.Util.Counter"""
+
+from Crypto.Util.py3compat import *
+
+import unittest
+
+class CounterTests(unittest.TestCase):
+    def setUp(self):
+        global Counter
+        from Crypto.Util import Counter
+
+    def test_BE(self):
+        """Big endian"""
+        c = Counter.new(128)
+        c = Counter.new(128, little_endian=False)
+
+    def test_LE(self):
+        """Little endian"""
+        c = Counter.new(128, little_endian=True)
+
+    def test_nbits(self):
+        c = Counter.new(nbits=128)
+        self.assertRaises(ValueError, Counter.new, 129)
+
+    def test_prefix(self):
+        c = Counter.new(128, prefix=b("xx"))
+
+    def test_suffix(self):
+        c = Counter.new(128, suffix=b("xx"))
+
+    def test_iv(self):
+        c = Counter.new(128, initial_value=2)
+        self.assertRaises(ValueError, Counter.new, 16, initial_value=0x1FFFF)
+
+def get_tests(config={}):
+    from Crypto.SelfTest.st_common import list_test_cases
+    return list_test_cases(CounterTests)
+
+if __name__ == '__main__':
+    suite = lambda: unittest.TestSuite(get_tests())
+    unittest.main(defaultTest='suite')
+
+# vim:set ts=4 sw=4 sts=4 expandtab: