diff --git a/Makefile b/Makefile
index 034310cf8..98b979a29 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ all:
 
 flake8:
 	@+flake8 --max-line-length=80 --exclude .asv,.tox,.ipynb_checkpoints,build \
-    -j 8 --count --statistics --exit-zero .
+    --ignore=W503,W504 -j 8 --count --statistics --exit-zero .
 
 test:
 	tox --skip-missing-interpreters
diff --git a/tox.ini b/tox.ini
index fef7be2e3..e49b6d8ad 100644
--- a/tox.ini
+++ b/tox.ini
@@ -77,12 +77,14 @@ commands =
 [testenv:flake8]
 deps = flake8
 commands =
-    flake8 --max-line-length=80 -j 8 --count --statistics --exit-zero .
+    flake8 --max-line-length=80 --exclude .asv,.tox,.ipynb_checkpoints,build \
+  --ignore=W503,W504 -j 8 --count --statistics --exit-zero .
 
 [testenv:setup.py]
 deps =
     docutils
     pygments
+    py-make>=0.1.0
 commands =
     python setup.py check --restructuredtext --metadata --strict
     python setup.py make none
diff --git a/tqdm/_tqdm.py b/tqdm/_tqdm.py
index 209baa4f9..614d86f5d 100755
--- a/tqdm/_tqdm.py
+++ b/tqdm/_tqdm.py
@@ -431,7 +431,7 @@ def format_meter(n, total, elapsed, ncols=None, prefix='', ascii=False,
                 ascii = UTF_FMT
             nsyms = len(ascii) - 1
             bar_length, frac_bar_length = divmod(
-                    int(frac * N_BARS * nsyms), nsyms)
+                int(frac * N_BARS * nsyms), nsyms)
 
             bar = ascii[-1] * bar_length
             frac_bar = ascii[frac_bar_length]
diff --git a/tqdm/tests/tests_tqdm.py b/tqdm/tests/tests_tqdm.py
index 35c62a780..2aed9e719 100644
--- a/tqdm/tests/tests_tqdm.py
+++ b/tqdm/tests/tests_tqdm.py
@@ -74,11 +74,11 @@ def pos_line_diff(res_list, expected_list, raise_nonempty=True):
     elif ln > len(expected_list):
         res = [(r, None) for r in res_list[ln:]]
     res = [(r, e) for r, e in zip(res_list, expected_list)
-           for pos in [len(e)-len(e.lstrip('\n'))]  # bar position
+           for pos in [len(e) - len(e.lstrip('\n'))]  # bar position
            if not r.startswith(e)  # start matches
            or not (r.endswith('\x1b[A' * pos)  # move up at end
                    or r == '\n')  # final bar
-           or r[(-1-pos) * len('\x1b[A'):] == '\x1b[A']  # extra move up
+           or r[(-1 - pos) * len('\x1b[A'):] == '\x1b[A']  # extra move up
     if res and raise_nonempty:
         raise AssertionError(
             "Got => Expected\n" + '\n'.join('"%r" => "%r"' % i for i in res))
@@ -355,21 +355,9 @@ def test_native_string_io_for_default_file():
     stderr = sys.stderr
     try:
         sys.stderr = WriteTypeChecker(expected_type=type(''))
-
         for _ in tqdm(range(3)):
             pass
-    finally:
-        sys.stderr = stderr
-
-
-@with_setup(pretest, posttest)
-def test_native_string_io_for_default_file_with_encoding_none():
-    """Native strings written to unspecified files"""
-    stderr = sys.stderr
-    try:
-        sys.stderr = WriteTypeChecker(expected_type=type(''))
-        sys.stderr.encoding = None
-
+        sys.stderr.encoding = None  # py2 behaviour
         for _ in tqdm(range(3)):
             pass
     finally:
@@ -384,20 +372,16 @@ def test_unicode_string_io_for_specified_file():
 
 
 @with_setup(pretest, posttest)
-def test_byte_string_io_for_specified_file_with_forced_bytes():
-    """Byte strings written to specified files when forced"""
+def test_write_bytes():
+    """Test write_bytes argument with and without `file`"""
+    # specified file (and bytes)
     for _ in tqdm(range(3), file=WriteTypeChecker(expected_type=type(b'')),
                   write_bytes=True):
         pass
-
-
-@with_setup(pretest, posttest)
-def test_unicode_string_io_for_unspecified_file_with_forced_unicode():
-    """Unicode strings written to unspecified file when forced"""
+    # unspecified file (and unicode)
     stderr = sys.stderr
     try:
         sys.stderr = WriteTypeChecker(expected_type=type(u''))
-
         for _ in tqdm(range(3), write_bytes=False):
             pass
     finally: