diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index 4a70b33..ce2c5b2 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -336,8 +336,16 @@
         self.assertEqual(b.replace(b'i', b'a'), b'massassappa')
         self.assertEqual(b.replace(b'ss', b'x'), b'mixixippi')
 
+    def test_replace_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').replace, 32, b'')
+
     def test_split_string_error(self):
         self.assertRaises(TypeError, self.type2test(b'a b').split, u' ')
+        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, u' ')
+
+    def test_split_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').split, 32)
+        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, 32)
 
     def test_split_unicodewhitespace(self):
         for b in (b'a\x1Cb', b'a\x1Db', b'a\x1Eb', b'a\x1Fb'):
@@ -346,9 +354,6 @@
         b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F")
         self.assertEqual(b.split(), [b'\x1c\x1d\x1e\x1f'])
 
-    def test_rsplit_string_error(self):
-        self.assertRaises(TypeError, self.type2test(b'a b').rsplit, u' ')
-
     def test_rsplit_unicodewhitespace(self):
         b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F")
         self.assertEqual(b.rsplit(), [b'\x1c\x1d\x1e\x1f'])
@@ -364,6 +369,14 @@
         self.assertEqual(b.rpartition(b'i'), (b'mississipp', b'i', b''))
         self.assertEqual(b.rpartition(b'w'), (b'', b'', b'mississippi'))
 
+    def test_partition_string_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').partition, u' ')
+        self.assertRaises(TypeError, self.type2test(b'a b').rpartition, u' ')
+
+    def test_partition_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'a b').partition, 32)
+        self.assertRaises(TypeError, self.type2test(b'a b').rpartition, 32)
+
     def test_pickling(self):
         for proto in range(pickle.HIGHEST_PROTOCOL + 1):
             for b in b"", b"a", b"abc", b"\xffab\x80", b"\0\0\377\0\0":
@@ -378,9 +391,19 @@
         self.assertEqual(self.type2test(b'abc').rstrip(memoryview(b'ac')), b'ab')
 
     def test_strip_string_error(self):
-        self.assertRaises(TypeError, self.type2test(b'abc').strip, u'b')
-        self.assertRaises(TypeError, self.type2test(b'abc').lstrip, u'b')
-        self.assertRaises(TypeError, self.type2test(b'abc').rstrip, u'b')
+        self.assertRaises(TypeError, self.type2test(b'abc').strip, u'ac')
+        self.assertRaises(TypeError, self.type2test(b'abc').lstrip, u'ac')
+        self.assertRaises(TypeError, self.type2test(b'abc').rstrip, u'ac')
+
+    def test_strip_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b' abc ').strip, 32)
+        self.assertRaises(TypeError, self.type2test(b' abc ').lstrip, 32)
+        self.assertRaises(TypeError, self.type2test(b' abc ').rstrip, 32)
+
+    def test_xjust_int_error(self):
+        self.assertRaises(TypeError, self.type2test(b'abc').center, 7, 32)
+        self.assertRaises(TypeError, self.type2test(b'abc').ljust, 7, 32)
+        self.assertRaises(TypeError, self.type2test(b'abc').rjust, 7, 32)
 
     def test_ord(self):
         b = self.type2test(b'\0A\x7f\x80\xff')