blacken test

16 files changed, 501 insertions, 334 deletions

diff --git a/test/test_buffer.py b/test/test_buffer.py
index d723e8d..64fbdef 100644
--- a/test/test_buffer.py
+++ b/test/test_buffer.py
@@ -6,27 +6,28 @@ from msgpack import packb, unpackb
 
 def test_unpack_buffer():
     from array import array
-    buf = array('b')
+
+    buf = array("b")
     try:
-        buf.frombytes(packb((b'foo', b'bar')))
+        buf.frombytes(packb((b"foo", b"bar")))
     except AttributeError:  # PY2
-        buf.fromstring(packb((b'foo', b'bar')))
+        buf.fromstring(packb((b"foo", b"bar")))
     obj = unpackb(buf, use_list=1)
-    assert [b'foo', b'bar'] == obj
+    assert [b"foo", b"bar"] == obj
 
 
 def test_unpack_bytearray():
-    buf = bytearray(packb(('foo', 'bar')))
+    buf = bytearray(packb(("foo", "bar")))
     obj = unpackb(buf, use_list=1)
-    assert [b'foo', b'bar'] == obj
+    assert [b"foo", b"bar"] == obj
     expected_type = bytes
     assert all(type(s) == expected_type for s in obj)
 
 
 def test_unpack_memoryview():
-    buf = bytearray(packb(('foo', 'bar')))
+    buf = bytearray(packb(("foo", "bar")))
     view = memoryview(buf)
     obj = unpackb(view, use_list=1)
-    assert [b'foo', b'bar'] == obj
+    assert [b"foo", b"bar"] == obj
     expected_type = bytes
     assert all(type(s) == expected_type for s in obj)
diff --git a/test/test_case.py b/test/test_case.py
index 5a4bb6c..3bc1b26 100644
--- a/test/test_case.py
+++ b/test/test_case.py
@@ -6,97 +6,133 @@ from msgpack import packb, unpackb
 
 def check(length, obj):
     v = packb(obj)
-    assert len(v) == length, \
-        "%r length should be %r but get %r" % (obj, length, len(v))
+    assert len(v) == length, "%r length should be %r but get %r" % (obj, length, len(v))
     assert unpackb(v, use_list=0) == obj
 
+
 def test_1():
-    for o in [None, True, False, 0, 1, (1 << 6), (1 << 7) - 1, -1,
-              -((1<<5)-1), -(1<<5)]:
+    for o in [
+        None,
+        True,
+        False,
+        0,
+        1,
+        (1 << 6),
+        (1 << 7) - 1,
+        -1,
+        -((1 << 5) - 1),
+        -(1 << 5),
+    ]:
         check(1, o)
 
+
 def test_2():
-    for o in [1 << 7, (1 << 8) - 1,
-              -((1<<5)+1), -(1<<7)
-             ]:
+    for o in [1 << 7, (1 << 8) - 1, -((1 << 5) + 1), -(1 << 7)]:
         check(2, o)
 
+
 def test_3():
-    for o in [1 << 8, (1 << 16) - 1,
-              -((1<<7)+1), -(1<<15)]:
+    for o in [1 << 8, (1 << 16) - 1, -((1 << 7) + 1), -(1 << 15)]:
         check(3, o)
 
+
 def test_5():
-    for o in [1 << 16, (1 << 32) - 1,
-              -((1<<15)+1), -(1<<31)]:
+    for o in [1 << 16, (1 << 32) - 1, -((1 << 15) + 1), -(1 << 31)]:
         check(5, o)
 
+
 def test_9():
-    for o in [1 << 32, (1 << 64) - 1,
-              -((1<<31)+1), -(1<<63),
-              1.0, 0.1, -0.1, -1.0]:
+    for o in [
+        1 << 32,
+        (1 << 64) - 1,
+        -((1 << 31) + 1),
+        -(1 << 63),
+        1.0,
+        0.1,
+        -0.1,
+        -1.0,
+    ]:
         check(9, o)
 
 
 def check_raw(overhead, num):
     check(num + overhead, b" " * num)
 
+
 def test_fixraw():
     check_raw(1, 0)
-    check_raw(1, (1<<5) - 1)
+    check_raw(1, (1 << 5) - 1)
+
 
 def test_raw16():
-    check_raw(3, 1<<5)
-    check_raw(3, (1<<16) - 1)
+    check_raw(3, 1 << 5)
+    check_raw(3, (1 << 16) - 1)
+
 
 def test_raw32():
-    check_raw(5, 1<<16)
+    check_raw(5, 1 << 16)
 
 
 def check_array(overhead, num):
     check(num + overhead, (None,) * num)
 
+
 def test_fixarray():
     check_array(1, 0)
     check_array(1, (1 << 4) - 1)
 
+
 def test_array16():
     check_array(3, 1 << 4)
-    check_array(3, (1<<16)-1)
+    check_array(3, (1 << 16) - 1)
+
 
 def test_array32():
-    check_array(5, (1<<16))
+    check_array(5, (1 << 16))
 
 
 def match(obj, buf):
     assert packb(obj) == buf
     assert unpackb(buf, use_list=0) == obj
 
+
 def test_match():
     cases = [
-        (None, b'\xc0'),
-        (False, b'\xc2'),
-        (True, b'\xc3'),
-        (0, b'\x00'),
-        (127, b'\x7f'),
-        (128, b'\xcc\x80'),
-        (256, b'\xcd\x01\x00'),
-        (-1, b'\xff'),
-        (-33, b'\xd0\xdf'),
-        (-129, b'\xd1\xff\x7f'),
-        ({1:1}, b'\x81\x01\x01'),
+        (None, b"\xc0"),
+        (False, b"\xc2"),
+        (True, b"\xc3"),
+        (0, b"\x00"),
+        (127, b"\x7f"),
+        (128, b"\xcc\x80"),
+        (256, b"\xcd\x01\x00"),
+        (-1, b"\xff"),
+        (-33, b"\xd0\xdf"),
+        (-129, b"\xd1\xff\x7f"),
+        ({1: 1}, b"\x81\x01\x01"),
         (1.0, b"\xcb\x3f\xf0\x00\x00\x00\x00\x00\x00"),
-        ((), b'\x90'),
-        (tuple(range(15)),b"\x9f\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e"),
-        (tuple(range(16)),b"\xdc\x00\x10\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"),
-        ({}, b'\x80'),
-        (dict([(x,x) for x in range(15)]), b'\x8f\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06\x06\x07\x07\x08\x08\t\t\n\n\x0b\x0b\x0c\x0c\r\r\x0e\x0e'),
-        (dict([(x,x) for x in range(16)]), b'\xde\x00\x10\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06\x06\x07\x07\x08\x08\t\t\n\n\x0b\x0b\x0c\x0c\r\r\x0e\x0e\x0f\x0f'),
-        ]
+        ((), b"\x90"),
+        (
+            tuple(range(15)),
+            b"\x9f\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e",
+        ),
+        (
+            tuple(range(16)),
+            b"\xdc\x00\x10\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+        ),
+        ({}, b"\x80"),
+        (
+            dict([(x, x) for x in range(15)]),
+            b"\x8f\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06\x06\x07\x07\x08\x08\t\t\n\n\x0b\x0b\x0c\x0c\r\r\x0e\x0e",
+        ),
+        (
+            dict([(x, x) for x in range(16)]),
+            b"\xde\x00\x10\x00\x00\x01\x01\x02\x02\x03\x03\x04\x04\x05\x05\x06\x06\x07\x07\x08\x08\t\t\n\n\x0b\x0b\x0c\x0c\r\r\x0e\x0e\x0f\x0f",
+        ),
+    ]
 
     for v, p in cases:
         match(v, p)
 
-def test_unicode():
-    assert unpackb(packb('foobar'), use_list=1) == b'foobar'
 
+def test_unicode():
+    assert unpackb(packb("foobar"), use_list=1) == b"foobar"
diff --git a/test/test_extension.py b/test/test_extension.py
index 8aa0cbb..6b36575 100644
--- a/test/test_extension.py
+++ b/test/test_extension.py
@@ -9,37 +9,41 @@ def test_pack_ext_type():
         packer = msgpack.Packer()
         packer.pack_ext_type(0x42, s)
         return packer.bytes()
-    assert p(b'A')        == b'\xd4\x42A'          # fixext 1
-    assert p(b'AB')       == b'\xd5\x42AB'         # fixext 2
-    assert p(b'ABCD')     == b'\xd6\x42ABCD'       # fixext 4
-    assert p(b'ABCDEFGH') == b'\xd7\x42ABCDEFGH'   # fixext 8
-    assert p(b'A'*16)     == b'\xd8\x42' + b'A'*16 # fixext 16
-    assert p(b'ABC')      == b'\xc7\x03\x42ABC'        # ext 8
-    assert p(b'A'*0x0123)     == b'\xc8\x01\x23\x42' + b'A'*0x0123 # ext 16
-    assert p(b'A'*0x00012345) == b'\xc9\x00\x01\x23\x45\x42' + b'A'*0x00012345 # ext 32
+
+    assert p(b"A") == b"\xd4\x42A"  # fixext 1
+    assert p(b"AB") == b"\xd5\x42AB"  # fixext 2
+    assert p(b"ABCD") == b"\xd6\x42ABCD"  # fixext 4
+    assert p(b"ABCDEFGH") == b"\xd7\x42ABCDEFGH"  # fixext 8
+    assert p(b"A" * 16) == b"\xd8\x42" + b"A" * 16  # fixext 16
+    assert p(b"ABC") == b"\xc7\x03\x42ABC"  # ext 8
+    assert p(b"A" * 0x0123) == b"\xc8\x01\x23\x42" + b"A" * 0x0123  # ext 16
+    assert (
+        p(b"A" * 0x00012345) == b"\xc9\x00\x01\x23\x45\x42" + b"A" * 0x00012345
+    )  # ext 32
 
 
 def test_unpack_ext_type():
     def check(b, expected):
         assert msgpack.unpackb(b) == expected
 
-    check(b'\xd4\x42A',         ExtType(0x42, b'A'))        # fixext 1
-    check(b'\xd5\x42AB',        ExtType(0x42, b'AB'))       # fixext 2
-    check(b'\xd6\x42ABCD',      ExtType(0x42, b'ABCD'))     # fixext 4
-    check(b'\xd7\x42ABCDEFGH',  ExtType(0x42, b'ABCDEFGH')) # fixext 8
-    check(b'\xd8\x42' + b'A'*16, ExtType(0x42, b'A'*16))    # fixext 16
-    check(b'\xc7\x03\x42ABC',   ExtType(0x42, b'ABC'))      # ext 8
-    check(b'\xc8\x01\x23\x42' + b'A'*0x0123,
-          ExtType(0x42, b'A'*0x0123))                        # ext 16
-    check(b'\xc9\x00\x01\x23\x45\x42' + b'A'*0x00012345,
-          ExtType(0x42, b'A'*0x00012345))                   # ext 32
+    check(b"\xd4\x42A", ExtType(0x42, b"A"))  # fixext 1
+    check(b"\xd5\x42AB", ExtType(0x42, b"AB"))  # fixext 2
+    check(b"\xd6\x42ABCD", ExtType(0x42, b"ABCD"))  # fixext 4
+    check(b"\xd7\x42ABCDEFGH", ExtType(0x42, b"ABCDEFGH"))  # fixext 8
+    check(b"\xd8\x42" + b"A" * 16, ExtType(0x42, b"A" * 16))  # fixext 16
+    check(b"\xc7\x03\x42ABC", ExtType(0x42, b"ABC"))  # ext 8
+    check(b"\xc8\x01\x23\x42" + b"A" * 0x0123, ExtType(0x42, b"A" * 0x0123))  # ext 16
+    check(
+        b"\xc9\x00\x01\x23\x45\x42" + b"A" * 0x00012345,
+        ExtType(0x42, b"A" * 0x00012345),
+    )  # ext 32
 
 
 def test_extension_type():
     def default(obj):
-        print('default called', obj)
+        print("default called", obj)
         if isinstance(obj, array.array):
-            typecode = 123 # application specific typecode
+            typecode = 123  # application specific typecode
             try:
                 data = obj.tobytes()
             except AttributeError:
@@ -48,24 +52,27 @@ def test_extension_type():
         raise TypeError("Unknown type object %r" % (obj,))
 
     def ext_hook(code, data):
-        print('ext_hook called', code, data)
+        print("ext_hook called", code, data)
         assert code == 123
-        obj = array.array('d')
+        obj = array.array("d")
         try:
             obj.frombytes(data)
         except AttributeError:  # PY2
             obj.fromstring(data)
         return obj
 
-    obj = [42, b'hello', array.array('d', [1.1, 2.2, 3.3])]
+    obj = [42, b"hello", array.array("d", [1.1, 2.2, 3.3])]
     s = msgpack.packb(obj, default=default)
     obj2 = msgpack.unpackb(s, ext_hook=ext_hook)
     assert obj == obj2
 
+
 import sys
-if sys.version > '3':
+
+if sys.version > "3":
     long = int
 
+
 def test_overriding_hooks():
     def default(obj):
         if isinstance(obj, long):
diff --git a/test/test_format.py b/test/test_format.py
index 5fec0c3..c2cdfbd 100644
--- a/test/test_format.py
+++ b/test/test_format.py
@@ -3,68 +3,88 @@
 
 from msgpack import unpackb
 
+
 def check(src, should, use_list=0):
     assert unpackb(src, use_list=use_list) == should
 
+
 def testSimpleValue():
-    check(b"\x93\xc0\xc2\xc3", 
-            (None, False, True,))
+    check(b"\x93\xc0\xc2\xc3", (None, False, True,))
+
 
 def testFixnum():
-    check(b"\x92\x93\x00\x40\x7f\x93\xe0\xf0\xff",
-          ((0,64,127,), (-32,-16,-1,),)
-          )
+    check(b"\x92\x93\x00\x40\x7f\x93\xe0\xf0\xff", ((0, 64, 127,), (-32, -16, -1,),))
+
 
 def testFixArray():
-    check(b"\x92\x90\x91\x91\xc0",
-          ((),((None,),),),
-          )
+    check(
+        b"\x92\x90\x91\x91\xc0", ((), ((None,),),),
+    )
+
 
 def testFixRaw():
-    check(b"\x94\xa0\xa1a\xa2bc\xa3def",
-          (b"", b"a", b"bc", b"def",),
-          )
+    check(
+        b"\x94\xa0\xa1a\xa2bc\xa3def", (b"", b"a", b"bc", b"def",),
+    )
+
 
 def testFixMap():
     check(
-          b"\x82\xc2\x81\xc0\xc0\xc3\x81\xc0\x80",
-          {False: {None: None}, True:{None:{}}},
-          )
+        b"\x82\xc2\x81\xc0\xc0\xc3\x81\xc0\x80",
+        {False: {None: None}, True: {None: {}}},
+    )
+
 
 def testUnsignedInt():
     check(
-          b"\x99\xcc\x00\xcc\x80\xcc\xff\xcd\x00\x00\xcd\x80\x00"
-          b"\xcd\xff\xff\xce\x00\x00\x00\x00\xce\x80\x00\x00\x00"
-          b"\xce\xff\xff\xff\xff",
-          (0, 128, 255, 0, 32768, 65535, 0, 2147483648, 4294967295,),
-          )
+        b"\x99\xcc\x00\xcc\x80\xcc\xff\xcd\x00\x00\xcd\x80\x00"
+        b"\xcd\xff\xff\xce\x00\x00\x00\x00\xce\x80\x00\x00\x00"
+        b"\xce\xff\xff\xff\xff",
+        (0, 128, 255, 0, 32768, 65535, 0, 2147483648, 4294967295,),
+    )
+
 
 def testSignedInt():
-    check(b"\x99\xd0\x00\xd0\x80\xd0\xff\xd1\x00\x00\xd1\x80\x00"
-          b"\xd1\xff\xff\xd2\x00\x00\x00\x00\xd2\x80\x00\x00\x00"
-          b"\xd2\xff\xff\xff\xff",
-          (0, -128, -1, 0, -32768, -1, 0, -2147483648, -1,))
+    check(
+        b"\x99\xd0\x00\xd0\x80\xd0\xff\xd1\x00\x00\xd1\x80\x00"
+        b"\xd1\xff\xff\xd2\x00\x00\x00\x00\xd2\x80\x00\x00\x00"
+        b"\xd2\xff\xff\xff\xff",
+        (0, -128, -1, 0, -32768, -1, 0, -2147483648, -1,),
+    )
+
 
 def testRaw():
-    check(b"\x96\xda\x00\x00\xda\x00\x01a\xda\x00\x02ab\xdb\x00\x00"
+    check(
+        b"\x96\xda\x00\x00\xda\x00\x01a\xda\x00\x02ab\xdb\x00\x00"
         b"\x00\x00\xdb\x00\x00\x00\x01a\xdb\x00\x00\x00\x02ab",
-        (b"", b"a", b"ab", b"", b"a", b"ab"))
+        (b"", b"a", b"ab", b"", b"a", b"ab"),
+    )
+
 
 def testArray():
-    check(b"\x96\xdc\x00\x00\xdc\x00\x01\xc0\xdc\x00\x02\xc2\xc3\xdd\x00"
+    check(
+        b"\x96\xdc\x00\x00\xdc\x00\x01\xc0\xdc\x00\x02\xc2\xc3\xdd\x00"
         b"\x00\x00\x00\xdd\x00\x00\x00\x01\xc0\xdd\x00\x00\x00\x02"
         b"\xc2\xc3",
-        ((), (None,), (False,True), (), (None,), (False,True))
-        )
+        ((), (None,), (False, True), (), (None,), (False, True)),
+    )
+
 
 def testMap():
     check(
         b"\x96"
-            b"\xde\x00\x00"
-            b"\xde\x00\x01\xc0\xc2"
-            b"\xde\x00\x02\xc0\xc2\xc3\xc2"
-            b"\xdf\x00\x00\x00\x00"
-            b"\xdf\x00\x00\x00\x01\xc0\xc2"
-            b"\xdf\x00\x00\x00\x02\xc0\xc2\xc3\xc2",
-        ({}, {None: False}, {True: False, None: False}, {},
-            {None: False}, {True: False, None: False}))
+        b"\xde\x00\x00"
+        b"\xde\x00\x01\xc0\xc2"
+        b"\xde\x00\x02\xc0\xc2\xc3\xc2"
+        b"\xdf\x00\x00\x00\x00"
+        b"\xdf\x00\x00\x00\x01\xc0\xc2"
+        b"\xdf\x00\x00\x00\x02\xc0\xc2\xc3\xc2",
+        (
+            {},
+            {None: False},
+            {True: False, None: False},
+            {},
+            {None: False},
+            {True: False, None: False},
+        ),
+    )
diff --git a/test/test_limits.py b/test/test_limits.py
index 8c7606f..6e85030 100644
--- a/test/test_limits.py
+++ b/test/test_limits.py
@@ -4,8 +4,14 @@ from __future__ import absolute_import, division, print_function, unicode_litera
 import pytest
 
 from msgpack import (
-    packb, unpackb, Packer, Unpacker, ExtType,
-    PackOverflowError, PackValueError, UnpackValueError,
+    packb,
+    unpackb,
+    Packer,
+    Unpacker,
+    ExtType,
+    PackOverflowError,
+    PackValueError,
+    UnpackValueError,
 )
 
 
@@ -13,30 +19,30 @@ def test_integer():
     x = -(2 ** 63)
     assert unpackb(packb(x)) == x
     with pytest.raises(PackOverflowError):
-        packb(x-1)
+        packb(x - 1)
 
     x = 2 ** 64 - 1
     assert unpackb(packb(x)) == x
     with pytest.raises(PackOverflowError):
-        packb(x+1)
+        packb(x + 1)
 
 
 def test_array_header():
     packer = Packer()
-    packer.pack_array_header(2**32-1)
+    packer.pack_array_header(2 ** 32 - 1)
     with pytest.raises(PackValueError):
-        packer.pack_array_header(2**32)
+        packer.pack_array_header(2 ** 32)
 
 
 def test_map_header():
     packer = Packer()
-    packer.pack_map_header(2**32-1)
+    packer.pack_map_header(2 ** 32 - 1)
     with pytest.raises(PackValueError):
-        packer.pack_array_header(2**32)
+        packer.pack_array_header(2 ** 32)
 
 
 def test_max_str_len():
-    d = 'x' * 3
+    d = "x" * 3
     packed = packb(d)
 
     unpacker = Unpacker(max_str_len=3, raw=False)
@@ -50,7 +56,7 @@ def test_max_str_len():
 
 
 def test_max_bin_len():
-    d = b'x' * 3
+    d = b"x" * 3
     packed = packb(d, use_bin_type=True)
 
     unpacker = Unpacker(max_bin_len=3)
@@ -64,7 +70,7 @@ def test_max_bin_len():
 
 
 def test_max_array_len():
-    d = [1,2,3]
+    d = [1, 2, 3]
     packed = packb(d)
 
     unpacker = Unpacker(max_array_len=3)
@@ -107,8 +113,8 @@ def test_max_ext_len():
 
 # PyPy fails following tests because of constant folding?
 # https://bugs.pypy.org/issue1721
-#@pytest.mark.skipif(True, reason="Requires very large memory.")
-#def test_binary():
+# @pytest.mark.skipif(True, reason="Requires very large memory.")
+# def test_binary():
 #    x = b'x' * (2**32 - 1)
 #    assert unpackb(packb(x)) == x
 #    del x
@@ -117,8 +123,8 @@ def test_max_ext_len():
 #        packb(x)
 #
 #
-#@pytest.mark.skipif(True, reason="Requires very large memory.")
-#def test_string():
+# @pytest.mark.skipif(True, reason="Requires very large memory.")
+# def test_string():
 #    x = 'x' * (2**32 - 1)
 #    assert unpackb(packb(x)) == x
 #    x += 'y'
@@ -126,8 +132,8 @@ def test_max_ext_len():
 #        packb(x)
 #
 #
-#@pytest.mark.skipif(True, reason="Requires very large memory.")
-#def test_array():
+# @pytest.mark.skipif(True, reason="Requires very large memory.")
+# def test_array():
 #    x = [0] * (2**32 - 1)
 #    assert unpackb(packb(x)) == x
 #    x.append(0)
@@ -137,8 +143,9 @@ def test_max_ext_len():
 
 # auto max len
 
+
 def test_auto_max_array_len():
-    packed = b'\xde\x00\x06zz'
+    packed = b"\xde\x00\x06zz"
     with pytest.raises(UnpackValueError):
         unpackb(packed, raw=False)
 
@@ -147,9 +154,10 @@ def test_auto_max_array_len():
     with pytest.raises(UnpackValueError):
         unpacker.unpack()
 
+
 def test_auto_max_map_len():
     # len(packed) == 6 -> max_map_len == 3
-    packed = b'\xde\x00\x04zzz'
+    packed = b"\xde\x00\x04zzz"
     with pytest.raises(UnpackValueError):
         unpackb(packed, raw=False)
 
diff --git a/test/test_memoryview.py b/test/test_memoryview.py
index f6d74ed..e1b63b8 100644
--- a/test/test_memoryview.py
+++ b/test/test_memoryview.py
@@ -10,6 +10,7 @@ import sys
 #  - array type only supports old buffer interface
 #  - array.frombytes is not available, must use deprecated array.fromstring
 if sys.version_info[0] < 3:
+
     def make_memoryview(obj):
         return memoryview(buffer(obj))
 
@@ -20,6 +21,8 @@ if sys.version_info[0] < 3:
 
     def get_data(a):
         return a.tostring()
+
+
 else:
     make_memoryview = memoryview
 
@@ -49,64 +52,64 @@ def _runtest(format, nbytes, expected_header, expected_prefix, use_bin_type):
     # check packed header
     assert packed[:1] == expected_header
     # check packed length prefix, if any
-    assert packed[1:1+len(expected_prefix)] == expected_prefix
+    assert packed[1 : 1 + len(expected_prefix)] == expected_prefix
     # check packed data
-    assert packed[1+len(expected_prefix):] == original_data
+    assert packed[1 + len(expected_prefix) :] == original_data
     # check array unpacked correctly
     assert original_array == reconstructed_array
 
 
 def test_fixstr_from_byte():
-    _runtest('B', 1, b'\xa1', b'', False)
-    _runtest('B', 31, b'\xbf', b'', False)
+    _runtest("B", 1, b"\xa1", b"", False)
+    _runtest("B", 31, b"\xbf", b"", False)
 
 
 def test_fixstr_from_float():
-    _runtest('f', 4, b'\xa4', b'', False)
-    _runtest('f', 28, b'\xbc', b'', False)
+    _runtest("f", 4, b"\xa4", b"", False)
+    _runtest("f", 28, b"\xbc", b"", False)
 
 
 def test_str16_from_byte():
-    _runtest('B', 2**8, b'\xda', b'\x01\x00', False)
-    _runtest('B', 2**16-1, b'\xda', b'\xff\xff', False)
+    _runtest("B", 2 ** 8, b"\xda", b"\x01\x00", False)
+    _runtest("B", 2 ** 16 - 1, b"\xda", b"\xff\xff", False)
 
 
 def test_str16_from_float():
-    _runtest('f', 2**8, b'\xda', b'\x01\x00', False)
-    _runtest('f', 2**16-4, b'\xda', b'\xff\xfc', False)
+    _runtest("f", 2 ** 8, b"\xda", b"\x01\x00", False)
+    _runtest("f", 2 ** 16 - 4, b"\xda", b"\xff\xfc", False)
 
 
 def test_str32_from_byte():
-    _runtest('B', 2**16, b'\xdb', b'\x00\x01\x00\x00', False)
+    _runtest("B", 2 ** 16, b"\xdb", b"\x00\x01\x00\x00", False)
 
 
 def test_str32_from_float():
-    _runtest('f', 2**16, b'\xdb', b'\x00\x01\x00\x00', False)
+    _runtest("f", 2 ** 16, b"\xdb", b"\x00\x01\x00\x00", False)
 
 
 def test_bin8_from_byte():
-    _runtest('B', 1, b'\xc4', b'\x01', True)
-    _runtest('B', 2**8-1, b'\xc4', b'\xff', True)
+    _runtest("B", 1, b"\xc4", b"\x01", True)
+    _runtest("B", 2 ** 8 - 1, b"\xc4", b"\xff", True)
 
 
 def test_bin8_from_float():
-    _runtest('f', 4, b'\xc4', b'\x04', True)
-    _runtest('f', 2**8-4, b'\xc4', b'\xfc', True)
+    _runtest("f", 4, b"\xc4", b"\x04", True)
+    _runtest("f", 2 ** 8 - 4, b"\xc4", b"\xfc", True)
 
 
 def test_bin16_from_byte():
-    _runtest('B', 2**8, b'\xc5', b'\x01\x00', True)
-    _runtest('B', 2**16-1, b'\xc5', b'\xff\xff', True)
+    _runtest("B", 2 ** 8, b"\xc5", b"\x01\x00", True)
+    _runtest("B", 2 ** 16 - 1, b"\xc5", b"\xff\xff", True)
 
 
 def test_bin16_from_float():
-    _runtest('f', 2**8, b'\xc5', b'\x01\x00', True)
-    _runtest('f', 2**16-4, b'\xc5', b'\xff\xfc', True)
+    _runtest("f", 2 ** 8, b"\xc5", b"\x01\x00", True)
+    _runtest("f", 2 ** 16 - 4, b"\xc5", b"\xff\xfc", True)
 
 
 def test_bin32_from_byte():
-    _runtest('B', 2**16, b'\xc6', b'\x00\x01\x00\x00', True)
+    _runtest("B", 2 ** 16, b"\xc6", b"\x00\x01\x00\x00", True)
 
 
 def test_bin32_from_float():
-    _runtest('f', 2**16, b'\xc6', b'\x00\x01\x00\x00', True)
+    _runtest("f", 2 ** 16, b"\xc6", b"\x00\x01\x00\x00", True)
diff --git a/test/test_newspec.py b/test/test_newspec.py
index ab05029..f4f2a23 100644
--- a/test/test_newspec.py
+++ b/test/test_newspec.py
@@ -4,85 +4,87 @@ from msgpack import packb, unpackb, ExtType
 
 
 def test_str8():
-    header = b'\xd9'
-    data = b'x' * 32
+    header = b"\xd9"
+    data = b"x" * 32
     b = packb(data.decode(), use_bin_type=True)
     assert len(b) == len(data) + 2
-    assert b[0:2] == header + b'\x20'
+    assert b[0:2] == header + b"\x20"
     assert b[2:] == data
     assert unpackb(b) == data
 
-    data = b'x' * 255
+    data = b"x" * 255
     b = packb(data.decode(), use_bin_type=True)
     assert len(b) == len(data) + 2
-    assert b[0:2] == header + b'\xff'
+    assert b[0:2] == header + b"\xff"
     assert b[2:] == data
     assert unpackb(b) == data
 
 
 def test_bin8():
-    header = b'\xc4'
-    data = b''
+    header = b"\xc4"
+    data = b""
     b = packb(data, use_bin_type=True)
     assert len(b) == len(data) + 2
-    assert b[0:2] == header + b'\x00'
+    assert b[0:2] == header + b"\x00"
     assert b[2:] == data
     assert unpackb(b) == data
 
-    data = b'x' * 255
+    data = b"x" * 255
     b = packb(data, use_bin_type=True)
     assert len(b) == len(data) + 2
-    assert b[0:2] == header + b'\xff'
+    assert b[0:2] == header + b"\xff"
     assert b[2:] == data
     assert unpackb(b) == data
 
 
 def test_bin16():
-    header = b'\xc5'
-    data = b'x' * 256
+    header = b"\xc5"
+    data = b"x" * 256
     b = packb(data, use_bin_type=True)
     assert len(b) == len(data) + 3
     assert b[0:1] == header
-    assert b[1:3] == b'\x01\x00'
+    assert b[1:3] == b"\x01\x00"
     assert b[3:] == data
     assert unpackb(b) == data
 
-    data = b'x' * 65535
+    data = b"x" * 65535
     b = packb(data, use_bin_type=True)
     assert len(b) == len(data) + 3
     assert b[0:1] == header
-    assert b[1:3] == b'\xff\xff'
+    assert b[1:3] == b"\xff\xff"
     assert b[3:] == data
     assert unpackb(b) == data
 
 
 def test_bin32():
-    header = b'\xc6'
-    data = b'x' * 65536
+    header = b"\xc6"
+    data = b"x" * 65536
     b = packb(data, use_bin_type=True)
     assert len(b) == len(data) + 5
     assert b[0:1] == header
-    assert b[1:5] == b'\x00\x01\x00\x00'
+    assert b[1:5] == b"\x00\x01\x00\x00"
     assert b[5:] == data
     assert unpackb(b) == data
 
+
 def test_ext():
     def check(ext, packed):
         assert packb(ext) == packed
         assert unpackb(packed) == ext
-    check(ExtType(0x42, b'Z'), b'\xd4\x42Z') # fixext 1
-    check(ExtType(0x42, b'ZZ'), b'\xd5\x42ZZ') # fixext 2
-    check(ExtType(0x42, b'Z'*4), b'\xd6\x42' + b'Z'*4) # fixext 4
-    check(ExtType(0x42, b'Z'*8), b'\xd7\x42' + b'Z'*8) # fixext 8
-    check(ExtType(0x42, b'Z'*16), b'\xd8\x42' + b'Z'*16) # fixext 16
+
+    check(ExtType(0x42, b"Z"), b"\xd4\x42Z")  # fixext 1
+    check(ExtType(0x42, b"ZZ"), b"\xd5\x42ZZ")  # fixext 2
+    check(ExtType(0x42, b"Z" * 4), b"\xd6\x42" + b"Z" * 4)  # fixext 4
+    check(ExtType(0x42, b"Z" * 8), b"\xd7\x42" + b"Z" * 8)  # fixext 8
+    check(ExtType(0x42, b"Z" * 16), b"\xd8\x42" + b"Z" * 16)  # fixext 16
     # ext 8
-    check(ExtType(0x42, b''), b'\xc7\x00\x42')
-    check(ExtType(0x42, b'Z'*255), b'\xc7\xff\x42' + b'Z'*255)
+    check(ExtType(0x42, b""), b"\xc7\x00\x42")
+    check(ExtType(0x42, b"Z" * 255), b"\xc7\xff\x42" + b"Z" * 255)
     # ext 16
-    check(ExtType(0x42, b'Z'*256), b'\xc8\x01\x00\x42' + b'Z'*256)
-    check(ExtType(0x42, b'Z'*0xffff), b'\xc8\xff\xff\x42' + b'Z'*0xffff)
+    check(ExtType(0x42, b"Z" * 256), b"\xc8\x01\x00\x42" + b"Z" * 256)
+    check(ExtType(0x42, b"Z" * 0xFFFF), b"\xc8\xff\xff\x42" + b"Z" * 0xFFFF)
     # ext 32
-    check(ExtType(0x42, b'Z'*0x10000), b'\xc9\x00\x01\x00\x00\x42' + b'Z'*0x10000)
+    check(ExtType(0x42, b"Z" * 0x10000), b"\xc9\x00\x01\x00\x00\x42" + b"Z" * 0x10000)
     # needs large memory
-    #check(ExtType(0x42, b'Z'*0xffffffff),
+    # check(ExtType(0x42, b'Z'*0xffffffff),
     #              b'\xc9\xff\xff\xff\xff\x42' + b'Z'*0xffffffff)
diff --git a/test/test_obj.py b/test/test_obj.py
index 390c1b6..0b99cea 100644
--- a/test/test_obj.py
+++ b/test/test_obj.py
@@ -4,64 +4,76 @@
 from pytest import raises
 from msgpack import packb, unpackb
 
+
 def _decode_complex(obj):
-    if b'__complex__' in obj:
-        return complex(obj[b'real'], obj[b'imag'])
+    if b"__complex__" in obj:
+        return complex(obj[b"real"], obj[b"imag"])
     return obj
 
+
 def _encode_complex(obj):
     if isinstance(obj, complex):
-        return {b'__complex__': True, b'real': 1, b'imag': 2}
+        return {b"__complex__": True, b"real": 1, b"imag": 2}
     return obj
 
+
 def test_encode_hook():
-    packed = packb([3, 1+2j], default=_encode_complex)
+    packed = packb([3, 1 + 2j], default=_encode_complex)
     unpacked = unpackb(packed, use_list=1)
-    assert unpacked[1] == {b'__complex__': True, b'real': 1, b'imag': 2}
+    assert unpacked[1] == {b"__complex__": True, b"real": 1, b"imag": 2}
+
 
 def test_decode_hook():
-    packed = packb([3, {b'__complex__': True, b'real': 1, b'imag': 2}])
+    packed = packb([3, {b"__complex__": True, b"real": 1, b"imag": 2}])
     unpacked = unpackb(packed, object_hook=_decode_complex, use_list=1)
-    assert unpacked[1] == 1+2j
+    assert unpacked[1] == 1 + 2j
+
 
 def test_decode_pairs_hook():
     packed = packb([3, {1: 2, 3: 4}])
     prod_sum = 1 * 2 + 3 * 4
-    unpacked = unpackb(packed, object_pairs_hook=lambda l: sum(k * v for k, v in l), use_list=1)
+    unpacked = unpackb(
+        packed, object_pairs_hook=lambda l: sum(k * v for k, v in l), use_list=1
+    )
     assert unpacked[1] == prod_sum
 
+
 def test_only_one_obj_hook():
     with raises(TypeError):
-        unpackb(b'', object_hook=lambda x: x, object_pairs_hook=lambda x: x)
+        unpackb(b"", object_hook=lambda x: x, object_pairs_hook=lambda x: x)
+
 
 def test_bad_hook():
     with raises(TypeError):
-        packed = packb([3, 1+2j], default=lambda o: o)
+        packed = packb([3, 1 + 2j], default=lambda o: o)
         unpacked = unpackb(packed, use_list=1)
 
+
 def _arr_to_str(arr):
-    return ''.join(str(c) for c in arr)
+    return "".join(str(c) for c in arr)
+
 
 def test_array_hook():
-    packed = packb([1,2,3])
+    packed = packb([1, 2, 3])
     unpacked = unpackb(packed, list_hook=_arr_to_str, use_list=1)
-    assert unpacked == '123'
+    assert unpacked == "123"
 
 
 class DecodeError(Exception):
     pass
 
+
 def bad_complex_decoder(o):
     raise DecodeError("Ooops!")
 
 
 def test_an_exception_in_objecthook1():
     with raises(DecodeError):
-        packed = packb({1: {'__complex__': True, 'real': 1, 'imag': 2}})
+        packed = packb({1: {"__complex__": True, "real": 1, "imag": 2}})
         unpackb(packed, object_hook=bad_complex_decoder)
 
 
 def test_an_exception_in_objecthook2():
     with raises(DecodeError):
-        packed = packb({1: [{'__complex__': True, 'real': 1, 'imag': 2}]})
+        packed = packb({1: [{"__complex__": True, "real": 1, "imag": 2}]})
         unpackb(packed, list_hook=bad_complex_decoder, use_list=1)
diff --git a/test/test_pack.py b/test/test_pack.py
index b6752e5..de212ef 100644
--- a/test/test_pack.py
+++ b/test/test_pack.py
@@ -17,20 +17,46 @@ def check(data, use_list=False):
     re = unpackb(packb(data), use_list=use_list)
     assert re == data
 
+
 def testPack():
     test_data = [
-            0, 1, 127, 128, 255, 256, 65535, 65536, 4294967295, 4294967296,
-            -1, -32, -33, -128, -129, -32768, -32769, -4294967296, -4294967297,
-            1.0,
-        b"", b"a", b"a"*31, b"a"*32,
-        None, True, False,
-        (), ((),), ((), None,),
+        0,
+        1,
+        127,
+        128,
+        255,
+        256,
+        65535,
+        65536,
+        4294967295,
+        4294967296,
+        -1,
+        -32,
+        -33,
+        -128,
+        -129,
+        -32768,
+        -32769,
+        -4294967296,
+        -4294967297,
+        1.0,
+        b"",
+        b"a",
+        b"a" * 31,
+        b"a" * 32,
+        None,
+        True,
+        False,
+        (),
+        ((),),
+        ((), None,),
         {None: 0},
-        (1<<23),
-        ]
+        (1 << 23),
+    ]
     for td in test_data:
         check(td)
 
+
 def testPackUnicode():
     test_data = ["", "abcd", ["defgh"], "Русский текст"]
     for td in test_data:
@@ -41,43 +67,64 @@ def testPackUnicode():
         re = Unpacker(BytesIO(data), raw=False, use_list=1).unpack()
         assert re == td
 
+
 def testPackBytes():
     test_data = [
-        b"", b"abcd", (b"defgh",),
-        ]
+        b"",
+        b"abcd",
+        (b"defgh",),
+    ]
     for td in test_data:
         check(td)
 
+
 def testPackByteArrays():
     test_data = [
-        bytearray(b""), bytearray(b"abcd"), (bytearray(b"defgh"),),
-        ]
+        bytearray(b""),
+        bytearray(b"abcd"),
+        (bytearray(b"defgh"),),
+    ]
     for td in test_data:
         check(td)
 
-@pytest.mark.skipif(sys.version_info < (3,0), reason="Python 2 passes invalid surrogates")
+
+@pytest.mark.skipif(
+    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
+)
 def testIgnoreUnicodeErrors():
-    re = unpackb(packb(b'abc\xeddef', use_bin_type=False),
-                 raw=False, unicode_errors='ignore')
+    re = unpackb(
+        packb(b"abc\xeddef", use_bin_type=False), raw=False, unicode_errors="ignore"
+    )
     assert re == "abcdef"
 
+
 def testStrictUnicodeUnpack():
-    packed = packb(b'abc\xeddef', use_bin_type=False)
+    packed = packb(b"abc\xeddef", use_bin_type=False)
     with pytest.raises(UnicodeDecodeError):
         unpackb(packed, raw=False, use_list=1)
 
-@pytest.mark.skipif(sys.version_info < (3,0), reason="Python 2 passes invalid surrogates")
+
+@pytest.mark.skipif(
+    sys.version_info < (3, 0), reason="Python 2 passes invalid surrogates"
+)
 def testIgnoreErrorsPack():
-    re = unpackb(packb(u"abc\uDC80\uDCFFdef", use_bin_type=True, unicode_errors='ignore'), raw=False, use_list=1)
+    re = unpackb(
+        packb("abc\uDC80\uDCFFdef", use_bin_type=True, unicode_errors="ignore"),
+        raw=False,
+        use_list=1,
+    )
     assert re == "abcdef"
 
+
 def testDecodeBinary():
     re = unpackb(packb(b"abc"), use_list=1)
     assert re == b"abc"
 
+
 def testPackFloat():
-    assert packb(1.0, use_single_float=True)  == b'\xca' + struct.pack(str('>f'), 1.0)
-    assert packb(1.0, use_single_float=False) == b'\xcb' + struct.pack(str('>d'), 1.0)
+    assert packb(1.0, use_single_float=True) == b"\xca" + struct.pack(str(">f"), 1.0)
+    assert packb(1.0, use_single_float=False) == b"\xcb" + struct.pack(str(">d"), 1.0)
+
 
 def testArraySize(sizes=[0, 5, 50, 1000]):
     bio = BytesIO()
@@ -92,6 +139,7 @@ def testArraySize(sizes=[0, 5, 50, 1000]):
     for size in sizes:
         assert unpacker.unpack() == list(range(size))
 
+
 def test_manualreset(sizes=[0, 5, 50, 1000]):
     packer = Packer(autoreset=False)
     for size in sizes:
@@ -105,7 +153,8 @@ def test_manualreset(sizes=[0, 5, 50, 1000]):
         assert unpacker.unpack() == list(range(size))
 
     packer.reset()
-    assert packer.bytes() == b''
+    assert packer.bytes() == b""
+
 
 def testMapSize(sizes=[0, 5, 50, 1000]):
     bio = BytesIO()
@@ -113,8 +162,8 @@ def testMapSize(sizes=[0, 5, 50, 1000]):
     for size in sizes:
         bio.write(packer.pack_map_header(size))
         for i in range(size):
-            bio.write(packer.pack(i)) # key
-            bio.write(packer.pack(i * 2)) # value
+            bio.write(packer.pack(i))  # key
+            bio.write(packer.pack(i * 2))  # value
 
     bio.seek(0)
     unpacker = Unpacker(bio)
@@ -123,21 +172,24 @@ def testMapSize(sizes=[0, 5, 50, 1000]):
 
 
 def test_odict():
-    seq = [(b'one', 1), (b'two', 2), (b'three', 3), (b'four', 4)]
+    seq = [(b"one", 1), (b"two", 2), (b"three", 3), (b"four", 4)]
     od = OrderedDict(seq)
     assert unpackb(packb(od), use_list=1) == dict(seq)
+
     def pair_hook(seq):
         return list(seq)
+
     assert unpackb(packb(od), object_pairs_hook=pair_hook, use_list=1) == seq
 
 
 def test_pairlist():
-    pairlist = [(b'a', 1), (2, b'b'), (b'foo', b'bar')]
+    pairlist = [(b"a", 1), (2, b"b"), (b"foo", b"bar")]
     packer = Packer()
     packed = packer.pack_map_pairs(pairlist)
     unpacked = unpackb(packed, object_pairs_hook=list)
     assert pairlist == unpacked
 
+
 def test_get_buffer():
     packer = Packer(autoreset=0, use_bin_type=True)
     packer.pack([1, 2])
diff --git a/test/test_read_size.py b/test/test_read_size.py
index 4e6c2b9..8d8df64 100644
--- a/test/test_read_size.py
+++ b/test/test_read_size.py
@@ -1,66 +1,71 @@
 """Test Unpacker's read_array_header and read_map_header methods"""
 from msgpack import packb, Unpacker, OutOfData
+
 UnexpectedTypeException = ValueError
 
+
 def test_read_array_header():
     unpacker = Unpacker()
-    unpacker.feed(packb(['a', 'b', 'c']))
+    unpacker.feed(packb(["a", "b", "c"]))
     assert unpacker.read_array_header() == 3
-    assert unpacker.unpack() == b'a'
-    assert unpacker.unpack() == b'b'
-    assert unpacker.unpack() == b'c'
+    assert unpacker.unpack() == b"a"
+    assert unpacker.unpack() == b"b"
+    assert unpacker.unpack() == b"c"
     try:
         unpacker.unpack()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except OutOfData:
-        assert 1, 'okay'
+        assert 1, "okay"
 
 
 def test_read_map_header():
     unpacker = Unpacker()
-    unpacker.feed(packb({'a': 'A'}))
+    unpacker.feed(packb({"a": "A"}))
     assert unpacker.read_map_header() == 1
-    assert unpacker.unpack() == B'a'
-    assert unpacker.unpack() == B'A'
+    assert unpacker.unpack() == b"a"
+    assert unpacker.unpack() == b"A"
     try:
         unpacker.unpack()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except OutOfData:
-        assert 1, 'okay'
+        assert 1, "okay"
+
 
 def test_incorrect_type_array():
     unpacker = Unpacker()
     unpacker.feed(packb(1))
     try:
         unpacker.read_array_header()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except UnexpectedTypeException:
-        assert 1, 'okay'
+        assert 1, "okay"
+
 
 def test_incorrect_type_map():
     unpacker = Unpacker()
     unpacker.feed(packb(1))
     try:
         unpacker.read_map_header()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except UnexpectedTypeException:
-        assert 1, 'okay'
+        assert 1, "okay"
+
 
 def test_correct_type_nested_array():
     unpacker = Unpacker()
-    unpacker.feed(packb({'a': ['b', 'c', 'd']}))
+    unpacker.feed(packb({"a": ["b", "c", "d"]}))
     try:
         unpacker.read_array_header()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except UnexpectedTypeException:
-        assert 1, 'okay'
+        assert 1, "okay"
+
 
 def test_incorrect_type_nested_map():
     unpacker = Unpacker()
-    unpacker.feed(packb([{'a': 'b'}]))
+    unpacker.feed(packb([{"a": "b"}]))
     try:
         unpacker.read_map_header()
-        assert 0, 'should raise exception'
+        assert 0, "should raise exception"
     except UnexpectedTypeException:
-        assert 1, 'okay'
-
+        assert 1, "okay"
diff --git a/test/test_seq.py b/test/test_seq.py
index fed9ff4..0d5d806 100644
--- a/test/test_seq.py
+++ b/test/test_seq.py
@@ -7,8 +7,9 @@ import msgpack
 
 binarydata = bytes(bytearray(range(256)))
 
+
 def gen_binary_data(idx):
-    return binarydata[:idx % 300]
+    return binarydata[: idx % 300]
 
 
 def test_exceeding_unpacker_read_size():
@@ -18,10 +19,10 @@ def test_exceeding_unpacker_read_size():
 
     NUMBER_OF_STRINGS = 6
     read_size = 16
-                                # 5 ok for read_size=16, while 6 glibc detected *** python: double free or corruption (fasttop):
-                                # 20 ok for read_size=256, while 25 segfaults / glibc detected *** python: double free or corruption (!prev)
-                                # 40 ok for read_size=1024, while 50 introduces errors
-                                # 7000 ok for read_size=1024*1024, while 8000 leads to  glibc detected *** python: double free or corruption (!prev):
+    # 5 ok for read_size=16, while 6 glibc detected *** python: double free or corruption (fasttop):
+    # 20 ok for read_size=256, while 25 segfaults / glibc detected *** python: double free or corruption (!prev)
+    # 40 ok for read_size=1024, while 50 introduces errors
+    # 7000 ok for read_size=1024*1024, while 8000 leads to  glibc detected *** python: double free or corruption (!prev):
 
     for idx in range(NUMBER_OF_STRINGS):
         data = gen_binary_data(idx)
diff --git a/test/test_sequnpack.py b/test/test_sequnpack.py
index 59718f5..e576571 100644
--- a/test/test_sequnpack.py
+++ b/test/test_sequnpack.py
@@ -10,102 +10,115 @@ from pytest import raises
 
 def test_partialdata():
     unpacker = Unpacker()
-    unpacker.feed(b'\xa5')
-    with raises(StopIteration): next(iter(unpacker))
-    unpacker.feed(b'h')
-    with raises(StopIteration): next(iter(unpacker))
-    unpacker.feed(b'a')
-    with raises(StopIteration): next(iter(unpacker))
-    unpacker.feed(b'l')
-    with raises(StopIteration): next(iter(unpacker))
-    unpacker.feed(b'l')
-    with raises(StopIteration): next(iter(unpacker))
-    unpacker.feed(b'o')
-    assert next(iter(unpacker)) == b'hallo'
+    unpacker.feed(b"\xa5")
+    with raises(StopIteration):
+        next(iter(unpacker))
+    unpacker.feed(b"h")
+    with raises(StopIteration):
+        next(iter(unpacker))
+    unpacker.feed(b"a")
+    with raises(StopIteration):
+        next(iter(unpacker))
+    unpacker.feed(b"l")
+    with raises(StopIteration):
+        next(iter(unpacker))
+    unpacker.feed(b"l")
+    with raises(StopIteration):
+        next(iter(unpacker))
+    unpacker.feed(b"o")
+    assert next(iter(unpacker)) == b"hallo"
+
 
 def test_foobar():
     unpacker = Unpacker(read_size=3, use_list=1)
-    unpacker.feed(b'foobar')
-    assert unpacker.unpack() == ord(b'f')
-    assert unpacker.unpack() == ord(b'o')
-    assert unpacker.unpack() == ord(b'o')
-    assert unpacker.unpack() == ord(b'b')
-    assert unpacker.unpack() == ord(b'a')
-    assert unpacker.unpack() == ord(b'r')
+    unpacker.feed(b"foobar")
+    assert unpacker.unpack() == ord(b"f")
+    assert unpacker.unpack() == ord(b"o")
+    assert unpacker.unpack() == ord(b"o")
+    assert unpacker.unpack() == ord(b"b")
+    assert unpacker.unpack() == ord(b"a")
+    assert unpacker.unpack() == ord(b"r")
     with raises(OutOfData):
         unpacker.unpack()
 
-    unpacker.feed(b'foo')
-    unpacker.feed(b'bar')
+    unpacker.feed(b"foo")
+    unpacker.feed(b"bar")
 
     k = 0
-    for o, e in zip(unpacker, 'foobarbaz'):
+    for o, e in zip(unpacker, "foobarbaz"):
         assert o == ord(e)
         k += 1
-    assert k == len(b'foobar')
+    assert k == len(b"foobar")
+
 
 def test_foobar_skip():
     unpacker = Unpacker(read_size=3, use_list=1)
-    unpacker.feed(b'foobar')
-    assert unpacker.unpack() == ord(b'f')
+    unpacker.feed(b"foobar")
+    assert unpacker.unpack() == ord(b"f")
     unpacker.skip()
-    assert unpacker.unpack() == ord(b'o')
+    assert unpacker.unpack() == ord(b"o")
     unpacker.skip()
-    assert unpacker.unpack() == ord(b'a')
+    assert unpacker.unpack() == ord(b"a")
     unpacker.skip()
     with raises(OutOfData):
         unpacker.unpack()
 
+
 def test_maxbuffersize():
     with raises(ValueError):
         Unpacker(read_size=5, max_buffer_size=3)
     unpacker = Unpacker(read_size=3, max_buffer_size=3, use_list=1)
-    unpacker.feed(b'fo')
+    unpacker.feed(b"fo")
     with raises(BufferFull):
-        unpacker.feed(b'ob')
-    unpacker.feed(b'o')
-    assert ord('f') == next(unpacker)
-    unpacker.feed(b'b')
-    assert ord('o') == next(unpacker)
-    assert ord('o') == next(unpacker)
-    assert ord('b') == next(unpacker)
+        unpacker.feed(b"ob")
+    unpacker.feed(b"o")
+    assert ord("f") == next(unpacker)
+    unpacker.feed(b"b")
+    assert ord("o") == next(unpacker)
+    assert ord("o") == next(unpacker)
+    assert ord("b") == next(unpacker)
 
 
 def test_readbytes():
     unpacker = Unpacker(read_size=3)
-    unpacker.feed(b'foobar')
-    assert unpacker.unpack() == ord(b'f')
-    assert unpacker.read_bytes(3) == b'oob'
-    assert unpacker.unpack() == ord(b'a')
-    assert unpacker.unpack() == ord(b'r')
+    unpacker.feed(b"foobar")
+    assert unpacker.unpack() == ord(b"f")
+    assert unpacker.read_bytes(3) == b"oob"
+    assert unpacker.unpack() == ord(b"a")
+    assert unpacker.unpack() == ord(b"r")
 
     # Test buffer refill
-    unpacker = Unpacker(io.BytesIO(b'foobar'), read_size=3)
-    assert unpacker.unpack() == ord(b'f')
-    assert unpacker.read_bytes(3) == b'oob'
-    assert unpacker.unpack() == ord(b'a')
-    assert unpacker.unpack() == ord(b'r')
+    unpacker = Unpacker(io.BytesIO(b"foobar"), read_size=3)
+    assert unpacker.unpack() == ord(b"f")
+    assert unpacker.read_bytes(3) == b"oob"
+    assert unpacker.unpack() == ord(b"a")
+    assert unpacker.unpack() == ord(b"r")
+
 
 def test_issue124():
     unpacker = Unpacker()
-    unpacker.feed(b'\xa1?\xa1!')
-    assert tuple(unpacker) == (b'?', b'!')
+    unpacker.feed(b"\xa1?\xa1!")
+    assert tuple(unpacker) == (b"?", b"!")
     assert tuple(unpacker) == ()
     unpacker.feed(b"\xa1?\xa1")
-    assert tuple(unpacker) == (b'?',)
+    assert tuple(unpacker) == (b"?",)
     assert tuple(unpacker) == ()
     unpacker.feed(b"!")
-    assert tuple(unpacker) == (b'!',)
+    assert tuple(unpacker) == (b"!",)
     assert tuple(unpacker) == ()
 
 
 def test_unpack_tell():
     stream = io.BytesIO()
-    messages = [2**i-1 for i in range(65)]
-    messages += [-(2**i) for i in range(1, 64)]
-    messages += [b'hello', b'hello'*1000, list(range(20)),
-                 {i: bytes(i)*i for i in range(10)},
-                 {i: bytes(i)*i for i in range(32)}]
+    messages = [2 ** i - 1 for i in range(65)]
+    messages += [-(2 ** i) for i in range(1, 64)]
+    messages += [
+        b"hello",
+        b"hello" * 1000,
+        list(range(20)),
+        {i: bytes(i) * i for i in range(10)},
+        {i: bytes(i) * i for i in range(32)},
+    ]
     offsets = []
     for m in messages:
         pack(m, stream)
diff --git a/test/test_stricttype.py b/test/test_stricttype.py
index 87e7c1c..78e1723 100644
--- a/test/test_stricttype.py
+++ b/test/test_stricttype.py
@@ -5,30 +5,32 @@ from msgpack import packb, unpackb, ExtType
 
 
 def test_namedtuple():
-    T = namedtuple('T', "foo bar")
+    T = namedtuple("T", "foo bar")
+
     def default(o):
         if isinstance(o, T):
             return dict(o._asdict())
-        raise TypeError('Unsupported type %s' % (type(o),))
+        raise TypeError("Unsupported type %s" % (type(o),))
+
     packed = packb(T(1, 42), strict_types=True, use_bin_type=True, default=default)
     unpacked = unpackb(packed, raw=False)
-    assert unpacked == {'foo': 1, 'bar': 42}
+    assert unpacked == {"foo": 1, "bar": 42}
 
 
 def test_tuple():
-    t = ('one', 2, b'three', (4, ))
+    t = ("one", 2, b"three", (4,))
 
     def default(o):
         if isinstance(o, tuple):
             return {
-                '__type__': 'tuple',
-                'value': list(o),
-                }
-        raise TypeError('Unsupported type %s' % (type(o),))
+                "__type__": "tuple",
+                "value": list(o),
+            }
+        raise TypeError("Unsupported type %s" % (type(o),))
 
     def convert(o):
-        if o.get('__type__') == 'tuple':
-            return tuple(o['value'])
+        if o.get("__type__") == "tuple":
+            return tuple(o["value"])
         return o
 
     data = packb(t, strict_types=True, use_bin_type=True, default=default)
@@ -38,7 +40,7 @@ def test_tuple():
 
 
 def test_tuple_ext():
-    t = ('one', 2, b'three', (4, ))
+    t = ("one", 2, b"three", (4,))
 
     MSGPACK_EXT_TYPE_TUPLE = 0
 
@@ -46,7 +48,8 @@ def test_tuple_ext():
         if isinstance(o, tuple):
             # Convert to list and pack
             payload = packb(
-                list(o), strict_types=True, use_bin_type=True, default=default)
+                list(o), strict_types=True, use_bin_type=True, default=default
+            )
             return ExtType(MSGPACK_EXT_TYPE_TUPLE, payload)
         raise TypeError(repr(o))
 
@@ -54,7 +57,7 @@ def test_tuple_ext():
         if code == MSGPACK_EXT_TYPE_TUPLE:
             # Unpack and convert to tuple
             return tuple(unpackb(payload, raw=False, ext_hook=convert))
-        raise ValueError('Unknown Ext code {}'.format(code))
+        raise ValueError("Unknown Ext code {}".format(code))
 
     data = packb(t, strict_types=True, use_bin_type=True, default=default)
     expected = unpackb(data, raw=False, ext_hook=convert)
diff --git a/test/test_subtype.py b/test/test_subtype.py
index 6807508..d91d455 100644
--- a/test/test_subtype.py
+++ b/test/test_subtype.py
@@ -4,16 +4,21 @@
 from msgpack import packb, unpackb
 from collections import namedtuple
 
+
 class MyList(list):
     pass
 
+
 class MyDict(dict):
     pass
 
+
 class MyTuple(tuple):
     pass
 
-MyNamedTuple = namedtuple('MyNamedTuple', 'x y')
+
+MyNamedTuple = namedtuple("MyNamedTuple", "x y")
+
 
 def test_types():
     assert packb(MyDict()) == packb(dict())
diff --git a/test/test_timestamp.py b/test/test_timestamp.py
index 55c2f6d..1348e69 100644
--- a/test/test_timestamp.py
+++ b/test/test_timestamp.py
@@ -4,34 +4,34 @@ from msgpack import Timestamp
 
 def test_timestamp():
     # timestamp32
-    ts = Timestamp(2**32 - 1)
+    ts = Timestamp(2 ** 32 - 1)
     assert ts.to_bytes() == b"\xff\xff\xff\xff"
     packed = msgpack.packb(ts)
     assert packed == b"\xd6\xff" + ts.to_bytes()
     unpacked = msgpack.unpackb(packed)
     assert ts == unpacked
-    assert ts.seconds == 2**32 - 1 and ts.nanoseconds == 0
+    assert ts.seconds == 2 ** 32 - 1 and ts.nanoseconds == 0
 
     # timestamp64
-    ts = Timestamp(2**34 - 1, 999999999)
+    ts = Timestamp(2 ** 34 - 1, 999999999)
     assert ts.to_bytes() == b"\xee\x6b\x27\xff\xff\xff\xff\xff"
     packed = msgpack.packb(ts)
     assert packed == b"\xd7\xff" + ts.to_bytes()
     unpacked = msgpack.unpackb(packed)
     assert ts == unpacked
-    assert ts.seconds == 2**34 - 1 and ts.nanoseconds == 999999999
+    assert ts.seconds == 2 ** 34 - 1 and ts.nanoseconds == 999999999
 
     # timestamp96
-    ts = Timestamp(2**63 - 1, 999999999)
+    ts = Timestamp(2 ** 63 - 1, 999999999)
     assert ts.to_bytes() == b"\x3b\x9a\xc9\xff\x7f\xff\xff\xff\xff\xff\xff\xff"
     packed = msgpack.packb(ts)
     assert packed == b"\xc7\x0c\xff" + ts.to_bytes()
     unpacked = msgpack.unpackb(packed)
     assert ts == unpacked
-    assert ts.seconds == 2**63 - 1 and ts.nanoseconds == 999999999
+    assert ts.seconds == 2 ** 63 - 1 and ts.nanoseconds == 999999999
 
     # negative fractional
-    ts = Timestamp(-2.3)  #s: -3, ns: 700000000
+    ts = Timestamp(-2.3)  # s: -3, ns: 700000000
     assert ts.to_bytes() == b"\x29\xb9\x27\x00\xff\xff\xff\xff\xff\xff\xff\xfd"
     packed = msgpack.packb(ts)
     assert packed == b"\xc7\x0c\xff" + ts.to_bytes()
diff --git a/test/test_unpack.py b/test/test_unpack.py
index 00a1061..bc74c4d 100644
--- a/test/test_unpack.py
+++ b/test/test_unpack.py
@@ -5,7 +5,7 @@ from pytest import raises, mark
 
 
 def test_unpack_array_header_from_file():
-    f = BytesIO(packb([1,2,3,4]))
+    f = BytesIO(packb([1, 2, 3, 4]))
     unpacker = Unpacker(f)
     assert unpacker.read_array_header() == 4
     assert unpacker.unpack() == 1
@@ -16,8 +16,10 @@ def test_unpack_array_header_from_file():
         unpacker.unpack()
 
 
-@mark.skipif("not hasattr(sys, 'getrefcount') == True",
-             reason='sys.getrefcount() is needed to pass this test')
+@mark.skipif(
+    "not hasattr(sys, 'getrefcount') == True",
+    reason="sys.getrefcount() is needed to pass this test",
+)
 def test_unpacker_hook_refcnt():
     result = []
 
@@ -43,12 +45,9 @@ def test_unpacker_hook_refcnt():
 
 
 def test_unpacker_ext_hook():
-
     class MyUnpacker(Unpacker):
-
         def __init__(self):
-            super(MyUnpacker, self).__init__(
-                ext_hook=self._hook, raw=False)
+            super(MyUnpacker, self).__init__(ext_hook=self._hook, raw=False)
 
         def _hook(self, code, data):
             if code == 1:
@@ -57,15 +56,15 @@ def test_unpacker_ext_hook():
                 return ExtType(code, data)
 
     unpacker = MyUnpacker()
-    unpacker.feed(packb({'a': 1}))
-    assert unpacker.unpack() == {'a': 1}
-    unpacker.feed(packb({'a': ExtType(1, b'123')}))
-    assert unpacker.unpack() == {'a': 123}
-    unpacker.feed(packb({'a': ExtType(2, b'321')}))
-    assert unpacker.unpack() == {'a': ExtType(2, b'321')}
+    unpacker.feed(packb({"a": 1}))
+    assert unpacker.unpack() == {"a": 1}
+    unpacker.feed(packb({"a": ExtType(1, b"123")}))
+    assert unpacker.unpack() == {"a": 123}
+    unpacker.feed(packb({"a": ExtType(2, b"321")}))
+    assert unpacker.unpack() == {"a": ExtType(2, b"321")}
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     test_unpack_array_header_from_file()
     test_unpacker_hook_refcnt()
     test_unpacker_ext_hook()