diff --git a/ldaptor/_scripts/ldap2dhcpconf.py b/ldaptor/_scripts/ldap2dhcpconf.py
index a589e02c..992e8d2e 100644
--- a/ldaptor/_scripts/ldap2dhcpconf.py
+++ b/ldaptor/_scripts/ldap2dhcpconf.py
@@ -30,7 +30,7 @@ def my_aton_numbits(num):
     n = 0
     while num > 0:
         n >>= 1
-        n |= 2 ** 31
+        n |= 2**31
         num -= 1
     return n
 
diff --git a/ldaptor/dns.py b/ldaptor/dns.py
index 0005e93e..710b3824 100644
--- a/ldaptor/dns.py
+++ b/ldaptor/dns.py
@@ -13,7 +13,7 @@ def aton_numbits(num):
     n = 0
     while num > 0:
         n >>= 1
-        n |= 2 ** 31
+        n |= 2**31
         num -= 1
     return n
 
@@ -35,7 +35,7 @@ def ntoa(n):
 
 def netmaskToNumbits(netmask):
     bits = aton(netmask)
-    i = 2 ** 31
+    i = 2**31
     n = 0
     while bits and i > 0:
         if (bits & i) == 0:
diff --git a/ldaptor/test/test_pureber.py b/ldaptor/test/test_pureber.py
index ea4633c9..5c8ccd25 100644
--- a/ldaptor/test/test_pureber.py
+++ b/ldaptor/test/test_pureber.py
@@ -34,7 +34,7 @@ class BerLengths(unittest.TestCase):
         (257, [0x80 | 2, 1, 1]),
         (65535, [0x80 | 2, 0xFF, 0xFF]),
         (65536, [0x80 | 3, 0x01, 0x00, 0x00]),
-        (256 ** 127 - 1, [0x80 | 127] + 127 * [0xFF]),
+        (256**127 - 1, [0x80 | 127] + 127 * [0xFF]),
     )
 
     def testToBER(self):
@@ -61,7 +61,7 @@ def testPartialBER(self):
             pureber.BERExceptionInsufficientData, pureber.berDecodeLength, m[:1]
         )
 
-        m = bytes(pureber.int2berlen(256 ** 100 - 1))
+        m = bytes(pureber.int2berlen(256**100 - 1))
         self.assertEqual(101, len(m))
         self.assertRaises(
             pureber.BERExceptionInsufficientData, pureber.berDecodeLength, m[:100]