diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fff3aa9..1dad804 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -40,7 +40,7 @@ jobs:
         source actions-ci/install.sh
     - name: Pip install pylint, black, & Sphinx
       run: |
-        pip install --force-reinstall pylint==1.9.2 black==19.10b0 Sphinx sphinx-rtd-theme
+        pip install --force-reinstall pylint black==19.10b0 Sphinx sphinx-rtd-theme
     - name: Library version
       run: git describe --dirty --always --tags
     - name: PyLint
diff --git a/.pylintrc b/.pylintrc
index cd65e95..d8f0ee8 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -119,7 +119,8 @@ spelling-store-unknown-words=no
 [MISCELLANEOUS]
 
 # List of note tags to take in consideration, separated by a comma.
-notes=FIXME,XXX,TODO
+# notes=FIXME,XXX,TODO
+notes=FIXME,XXX
 
 
 [TYPECHECK]
diff --git a/adafruit_motor/motor.py b/adafruit_motor/motor.py
index 69d1a48..31d0b24 100644
--- a/adafruit_motor/motor.py
+++ b/adafruit_motor/motor.py
@@ -40,6 +40,7 @@
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_Motor.git"
 
+
 class DCMotor:
     """DC motor driver. ``positive_pwm`` and ``negative_pwm`` can be swapped if the motor runs in
        the opposite direction from what was expected for "forwards".
@@ -48,6 +49,7 @@ class DCMotor:
          when high and the other is low.
        :param ~pulseio.PWMOut negative_pwm: The motor input that causes the motor to spin backwards
          when high and the other is low."""
+
     def __init__(self, positive_pwm, negative_pwm):
         self._positive = positive_pwm
         self._negative = negative_pwm
@@ -70,10 +72,10 @@ def throttle(self, value):
             self._positive.duty_cycle = 0
             self._negative.duty_cycle = 0
         elif value == 0:
-            self._positive.duty_cycle = 0xffff
-            self._negative.duty_cycle = 0xffff
+            self._positive.duty_cycle = 0xFFFF
+            self._negative.duty_cycle = 0xFFFF
         else:
-            duty_cycle = int(0xffff * abs(value))
+            duty_cycle = int(0xFFFF * abs(value))
             if value < 0:
                 self._positive.duty_cycle = 0
                 self._negative.duty_cycle = duty_cycle
diff --git a/adafruit_motor/servo.py b/adafruit_motor/servo.py
index da760a2..80ef829 100644
--- a/adafruit_motor/servo.py
+++ b/adafruit_motor/servo.py
@@ -34,20 +34,21 @@
 
 # We disable the too few public methods check because this is a private base class for the two types
 # of servos.
-class _BaseServo: # pylint: disable-msg=too-few-public-methods
+class _BaseServo:  # pylint: disable-msg=too-few-public-methods
     """Shared base class that handles pulse output based on a value between 0 and 1.0
 
        :param ~pulseio.PWMOut pwm_out: PWM output object.
        :param int min_pulse: The minimum pulse length of the servo in microseconds.
        :param int max_pulse: The maximum pulse length of the servo in microseconds."""
+
     def __init__(self, pwm_out, *, min_pulse=750, max_pulse=2250):
         self._pwm_out = pwm_out
         self.set_pulse_width_range(min_pulse, max_pulse)
 
     def set_pulse_width_range(self, min_pulse=750, max_pulse=2250):
         """Change min and max pulse widths."""
-        self._min_duty = int((min_pulse * self._pwm_out.frequency) / 1000000 * 0xffff)
-        max_duty = (max_pulse * self._pwm_out.frequency) / 1000000 * 0xffff
+        self._min_duty = int((min_pulse * self._pwm_out.frequency) / 1000000 * 0xFFFF)
+        max_duty = (max_pulse * self._pwm_out.frequency) / 1000000 * 0xFFFF
         self._duty_range = int(max_duty - self._min_duty)
 
     @property
@@ -56,20 +57,21 @@ def fraction(self):
         For conventional servos, corresponds to the servo position as a fraction
         of the actuation range. Is None when servo is diabled (pulsewidth of 0ms).
         """
-        if self._pwm_out.duty_cycle == 0:      # Special case for disabled servos
+        if self._pwm_out.duty_cycle == 0:  # Special case for disabled servos
             return None
         return (self._pwm_out.duty_cycle - self._min_duty) / self._duty_range
 
     @fraction.setter
     def fraction(self, value):
         if value is None:
-            self._pwm_out.duty_cycle = 0       # disable the motor
+            self._pwm_out.duty_cycle = 0  # disable the motor
             return
         if not 0.0 <= value <= 1.0:
             raise ValueError("Must be 0.0 to 1.0")
         duty_cycle = self._min_duty + int(value * self._duty_range)
         self._pwm_out.duty_cycle = duty_cycle
 
+
 class Servo(_BaseServo):
     """Control the position of a servo.
 
@@ -99,6 +101,7 @@ class Servo(_BaseServo):
          the servo mechanism may hit the end stops, buzz, and draw extra current as it stalls.
          Test carefully to find the safe minimum and maximum.
     """
+
     def __init__(self, pwm_out, *, actuation_range=180, min_pulse=750, max_pulse=2250):
         super().__init__(pwm_out, min_pulse=min_pulse, max_pulse=max_pulse)
         self.actuation_range = actuation_range
@@ -115,18 +118,20 @@ def angle(self):
 
     @angle.setter
     def angle(self, new_angle):
-        if new_angle is None:      # disable the servo by sending 0 signal
+        if new_angle is None:  # disable the servo by sending 0 signal
             self.fraction = None
             return
         if new_angle < 0 or new_angle > self.actuation_range:
             raise ValueError("Angle out of range")
         self.fraction = new_angle / self.actuation_range
 
+
 class ContinuousServo(_BaseServo):
     """Control a continuous rotation servo.
 
        :param int min_pulse: The minimum pulse width of the servo in microseconds.
        :param int max_pulse: The maximum pulse width of the servo in microseconds."""
+
     @property
     def throttle(self):
         """How much power is being delivered to the motor. Values range from ``-1.0`` (full
diff --git a/adafruit_motor/stepper.py b/adafruit_motor/stepper.py
index ffa78bc..5873cec 100644
--- a/adafruit_motor/stepper.py
+++ b/adafruit_motor/stepper.py
@@ -57,6 +57,7 @@
 """Step a fraction of a step by partially activating two neighboring coils. Step size is determined
    by ``microsteps`` constructor argument."""
 
+
 class StepperMotor:
     """A bipolar stepper motor or four coil unipolar motor.
 
@@ -70,10 +71,11 @@ class StepperMotor:
       the fourth coil (unipolar) or second input to second coil (bipolar).
     :param int microsteps: Number of microsteps between full steps. Must be at least 2 and even.
     """
+
     def __init__(self, ain1, ain2, bin1, bin2, *, microsteps=16):
         self._coil = (ain2, bin1, ain1, bin2)
 
-	# set a safe pwm freq for each output
+        # set a safe pwm freq for each output
         for i in range(4):
             if self._coil[i].frequency < 1500:
                 self._coil[i].frequency = 2000
@@ -84,8 +86,10 @@ def __init__(self, ain1, ain2, bin1, bin2, *, microsteps=16):
         if microsteps % 2 == 1:
             raise ValueError("Microsteps must be even")
         self._microsteps = microsteps
-        self._curve = [int(round(0xffff * math.sin(math.pi / (2 * microsteps) * i)))
-                       for i in range(microsteps + 1)]
+        self._curve = [
+            int(round(0xFFFF * math.sin(math.pi / (2 * microsteps) * i)))
+            for i in range(microsteps + 1)
+        ]
         self._update_coils()
 
     def _update_coils(self, *, microstepping=False):
@@ -98,10 +102,12 @@ def _update_coils(self, *, microstepping=False):
 
         # This ensures DOUBLE steps use full torque. Without it, we'd use partial torque from the
         # microstepping curve (0xb504).
-        if not microstepping and (duty_cycles[leading_coil] == duty_cycles[trailing_coil] and
-                                  duty_cycles[leading_coil] > 0):
-            duty_cycles[leading_coil] = 0xffff
-            duty_cycles[trailing_coil] = 0xffff
+        if not microstepping and (
+            duty_cycles[leading_coil] == duty_cycles[trailing_coil]
+            and duty_cycles[leading_coil] > 0
+        ):
+            duty_cycles[leading_coil] = 0xFFFF
+            duty_cycles[trailing_coil] = 0xFFFF
 
         # Energize coils as appropriate:
         for i in range(4):
@@ -145,8 +151,9 @@ def onestep(self, *, direction=FORWARD, style=SINGLE):
                 step_size = half_step
 
             current_interleave = self._current_microstep // half_step
-            if ((style == SINGLE and current_interleave % 2 == 1) or
-                    (style == DOUBLE and current_interleave % 2 == 0)):
+            if (style == SINGLE and current_interleave % 2 == 1) or (
+                style == DOUBLE and current_interleave % 2 == 0
+            ):
                 step_size = half_step
             elif style in (SINGLE, DOUBLE):
                 step_size = full_step
diff --git a/docs/conf.py b/docs/conf.py
index 121c2aa..707edb4 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -2,7 +2,8 @@
 
 import os
 import sys
-sys.path.insert(0, os.path.abspath('..'))
+
+sys.path.insert(0, os.path.abspath(".."))
 
 # -- General configuration ------------------------------------------------
 
@@ -10,9 +11,9 @@
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
 extensions = [
-    'sphinx.ext.autodoc',
-    'sphinx.ext.intersphinx',
-    'sphinx.ext.viewcode',
+    "sphinx.ext.autodoc",
+    "sphinx.ext.intersphinx",
+    "sphinx.ext.viewcode",
 ]
 
 # Uncomment the below if you use native CircuitPython modules such as
@@ -20,29 +21,32 @@
 # autodoc module docs will fail to generate with a warning.
 # autodoc_mock_imports = ["micropython"]
 
-intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3.4", None),
+    "CircuitPython": ("https://circuitpython.readthedocs.io/en/latest/", None),
+}
 
 # Add any paths that contain templates here, relative to this directory.
-templates_path = ['_templates']
+templates_path = ["_templates"]
 
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # General information about the project.
-project = u'Adafruit motor Library'
-copyright = u'2017 Scott Shawcroft'
-author = u'Scott Shawcroft'
+project = u"Adafruit motor Library"
+copyright = u"2017 Scott Shawcroft"
+author = u"Scott Shawcroft"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = u'1.0'
+version = u"1.0"
 # The full version, including alpha/beta/rc tags.
-release = u'1.0'
+release = u"1.0"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
@@ -54,7 +58,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store', '.env', 'CODE_OF_CONDUCT.md']
+exclude_patterns = ["_build", "Thumbs.db", ".DS_Store", ".env", "CODE_OF_CONDUCT.md"]
 
 # The reST default role (used for this markup: `text`) to use for all
 # documents.
@@ -66,7 +70,7 @@
 add_function_parentheses = True
 
 # The name of the Pygments (syntax highlighting) style to use.
-pygments_style = 'sphinx'
+pygments_style = "sphinx"
 
 # If true, `todo` and `todoList` produce output, else they produce nothing.
 todo_include_todos = False
@@ -77,12 +81,13 @@
 # Avoid an `= None` on instance attributes with their own doc strings.
 # Workaround from here: https://github.com/sphinx-doc/sphinx/issues/2044#issuecomment-285888160
 #
-from sphinx.ext.autodoc import (
-    ClassLevelDocumenter, InstanceAttributeDocumenter)
+from sphinx.ext.autodoc import ClassLevelDocumenter, InstanceAttributeDocumenter
+
 
 def iad_add_directive_header(self, sig):
     ClassLevelDocumenter.add_directive_header(self, sig)
 
+
 InstanceAttributeDocumenter.add_directive_header = iad_add_directive_header
 
 # -- Options for HTML output ----------------------------------------------
@@ -90,59 +95,62 @@ def iad_add_directive_header(self, sig):
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-on_rtd = os.environ.get('READTHEDOCS', None) == 'True'
+on_rtd = os.environ.get("READTHEDOCS", None) == "True"
 
 if not on_rtd:  # only import and set the theme if we're building docs locally
     try:
         import sphinx_rtd_theme
-        html_theme = 'sphinx_rtd_theme'
-        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), '.']
+
+        html_theme = "sphinx_rtd_theme"
+        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
     except:
-        html_theme = 'default'
-        html_theme_path = ['.']
+        html_theme = "default"
+        html_theme_path = ["."]
 else:
-    html_theme_path = ['.']
+    html_theme_path = ["."]
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ["_static"]
 
 # The name of an image file (relative to this directory) to use as a favicon of
 # the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
 # pixels large.
 #
-html_favicon = '_static/favicon.ico'
+html_favicon = "_static/favicon.ico"
 
 # Output file base name for HTML help builder.
-htmlhelp_basename = 'AdafruitMotorLibrarydoc'
+htmlhelp_basename = "AdafruitMotorLibrarydoc"
 
 # -- Options for LaTeX output ---------------------------------------------
 
 latex_elements = {
-     # The paper size ('letterpaper' or 'a4paper').
-     #
-     # 'papersize': 'letterpaper',
-
-     # The font size ('10pt', '11pt' or '12pt').
-     #
-     # 'pointsize': '10pt',
-
-     # Additional stuff for the LaTeX preamble.
-     #
-     # 'preamble': '',
-
-     # Latex figure (float) alignment
-     #
-     # 'figure_align': 'htbp',
+    # The paper size ('letterpaper' or 'a4paper').
+    #
+    # 'papersize': 'letterpaper',
+    # The font size ('10pt', '11pt' or '12pt').
+    #
+    # 'pointsize': '10pt',
+    # Additional stuff for the LaTeX preamble.
+    #
+    # 'preamble': '',
+    # Latex figure (float) alignment
+    #
+    # 'figure_align': 'htbp',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    (master_doc, 'AdafruitmotorLibrary.tex', u'Adafruitmotor Library Documentation',
-     author, 'manual'),
+    (
+        master_doc,
+        "AdafruitmotorLibrary.tex",
+        u"Adafruitmotor Library Documentation",
+        author,
+        "manual",
+    ),
 ]
 
 # -- Options for manual page output ---------------------------------------
@@ -150,8 +158,13 @@ def iad_add_directive_header(self, sig):
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (master_doc, 'Adafruitmotorlibrary', u'Adafruit motor Library Documentation',
-     [author], 1)
+    (
+        master_doc,
+        "Adafruitmotorlibrary",
+        u"Adafruit motor Library Documentation",
+        [author],
+        1,
+    )
 ]
 
 # -- Options for Texinfo output -------------------------------------------
@@ -160,7 +173,13 @@ def iad_add_directive_header(self, sig):
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    (master_doc, 'AdafruitmotorLibrary', u'Adafruit motor Library Documentation',
-     author, 'AdafruitmotorLibrary', 'One line description of project.',
-     'Miscellaneous'),
+    (
+        master_doc,
+        "AdafruitmotorLibrary",
+        u"Adafruit motor Library Documentation",
+        author,
+        "AdafruitmotorLibrary",
+        "One line description of project.",
+        "Miscellaneous",
+    ),
 ]
diff --git a/examples/motor_pca9685_dc_motor.py b/examples/motor_pca9685_dc_motor.py
index 01e629f..c5c18d2 100644
--- a/examples/motor_pca9685_dc_motor.py
+++ b/examples/motor_pca9685_dc_motor.py
@@ -27,7 +27,7 @@
 # cases. A capacitor can be used to help prevent this. The demo uses motor 4 because it worked ok
 # in testing without a capacitor.
 # See here for more info: https://learn.adafruit.com/adafruit-motor-shield-v2-for-arduino/faq#faq-13
-pca.channels[7].duty_cycle = 0xffff
+pca.channels[7].duty_cycle = 0xFFFF
 motor4 = motor.DCMotor(pca.channels[5], pca.channels[6])
 
 print("Forwards slow")
diff --git a/examples/motor_pca9685_stepper_motor.py b/examples/motor_pca9685_stepper_motor.py
index 39020af..824ce61 100644
--- a/examples/motor_pca9685_stepper_motor.py
+++ b/examples/motor_pca9685_stepper_motor.py
@@ -23,10 +23,11 @@
 # Motor 3 is channels 3 and 4 with 2 held high.
 # Motor 4 is channels 5 and 6 with 7 held high.
 
-pca.channels[7].duty_cycle = 0xffff
-pca.channels[2].duty_cycle = 0xffff
-stepper_motor = stepper.StepperMotor(pca.channels[4], pca.channels[3], # Motor 3
-                                     pca.channels[5], pca.channels[6]) # Motor 4
+pca.channels[7].duty_cycle = 0xFFFF
+pca.channels[2].duty_cycle = 0xFFFF
+stepper_motor = stepper.StepperMotor(
+    pca.channels[4], pca.channels[3], pca.channels[5], pca.channels[6]
+)
 
 for i in range(100):
     stepper_motor.onestep()
diff --git a/setup.py b/setup.py
index c84fe4f..5c9e73a 100644
--- a/setup.py
+++ b/setup.py
@@ -7,6 +7,7 @@
 
 # Always prefer setuptools over distutils
 from setuptools import setup, find_packages
+
 # To use a consistent encoding
 from codecs import open
 from os import path
@@ -14,47 +15,38 @@
 here = path.abspath(path.dirname(__file__))
 
 # Get the long description from the README file
-with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
+with open(path.join(here, "README.rst"), encoding="utf-8") as f:
     long_description = f.read()
 
 setup(
-    name='adafruit-circuitpython-motor',
-
+    name="adafruit-circuitpython-motor",
     use_scm_version=True,
-    setup_requires=['setuptools_scm'],
-
-    description='CircuitPython helper library provides higher level objects to control motors and servos.',
+    setup_requires=["setuptools_scm"],
+    description="CircuitPython helper library provides higher level objects to control motors and servos.",
     long_description=long_description,
-    long_description_content_type='text/x-rst',
-
+    long_description_content_type="text/x-rst",
     # The project's main homepage.
-    url='https://github.com/adafruit/Adafruit_CircuitPython_Motor',
-
+    url="https://github.com/adafruit/Adafruit_CircuitPython_Motor",
     # Author details
-    author='Adafruit Industries',
-    author_email='circuitpython@adafruit.com',
-
-    install_requires=['Adafruit-Blinka'],
-
+    author="Adafruit Industries",
+    author_email="circuitpython@adafruit.com",
+    install_requires=["Adafruit-Blinka"],
     # Choose your license
-    license='MIT',
-
+    license="MIT",
     # See https://pypi.python.org/pypi?%3Aaction=list_classifiers
     classifiers=[
-        'Development Status :: 3 - Alpha',
-        'Intended Audience :: Developers',
-        'Topic :: Software Development :: Libraries',
-        'Topic :: System :: Hardware',
-        'License :: OSI Approved :: MIT License',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
+        "Development Status :: 3 - Alpha",
+        "Intended Audience :: Developers",
+        "Topic :: Software Development :: Libraries",
+        "Topic :: System :: Hardware",
+        "License :: OSI Approved :: MIT License",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
     ],
-
     # What does your project relate to?
-    keywords='adafruit servo stepper motor hardware micropython circuitpython',
-
+    keywords="adafruit servo stepper motor hardware micropython circuitpython",
     # You can just specify the packages manually here if your project is
     # simple. Or you can use find_packages().
-    packages=['adafruit_motor'],
-)
\ No newline at end of file
+    packages=["adafruit_motor"],
+)
diff --git a/tests/test_stepper.py b/tests/test_stepper.py
index 3f939b6..e262ab2 100644
--- a/tests/test_stepper.py
+++ b/tests/test_stepper.py
@@ -3,12 +3,13 @@
 from unittest.mock import MagicMock
 
 # Fix up the path to include our neighboring module.
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-micropython = MagicMock() # pylint: disable-msg=invalid-name
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
+micropython = MagicMock()  # pylint: disable-msg=invalid-name
 micropython.const = lambda x: x
 sys.modules["micropython"] = micropython
 
-from adafruit_motor import stepper # pylint: disable-msg=wrong-import-position
+from adafruit_motor import stepper  # pylint: disable-msg=wrong-import-position
+
 
 class Coil:
     def __init__(self):
@@ -24,20 +25,22 @@ def duty_cycle(self):
 
     @duty_cycle.setter
     def duty_cycle(self, value):
-        assert 0 <= value <= 0xffff
+        assert 0 <= value <= 0xFFFF
         self._duty_cycle = value
 
+
 def test_single_coil():
     coil = (Coil(), Coil(), Coil(), Coil())
     # We undo the coil order so our tests make more sense.
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3])
     # Always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
-    for i in range(1, 7): # Test 6 steps so we wrap around
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
+    for i in range(1, 7):  # Test 6 steps so we wrap around
         motor.onestep()
         for j in range(4):
-            assert coil[j].duty_cycle == (0xffff if i % 4 == j else 0)
+            assert coil[j].duty_cycle == (0xFFFF if i % 4 == j else 0)
+
 
 def test_double_coil():
     coil = (Coil(), Coil(), Coil(), Coil())
@@ -45,11 +48,14 @@ def test_double_coil():
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3])
     # Despite double stepping we always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
-    for i in range(6): # Test 6 steps so we wrap around
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
+    for i in range(6):  # Test 6 steps so we wrap around
         motor.onestep(style=stepper.DOUBLE)
         for j in range(4):
-            assert coil[j].duty_cycle == (0xffff if i % 4 == j or (i + 1) % 4 == j else 0)
+            assert coil[j].duty_cycle == (
+                0xFFFF if i % 4 == j or (i + 1) % 4 == j else 0
+            )
+
 
 def test_interleave_steps():
     coil = (Coil(), Coil(), Coil(), Coil())
@@ -57,25 +63,26 @@ def test_interleave_steps():
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3])
     # We always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
-    for i in range(15): # Test 15 half steps so we wrap around
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
+    for i in range(15):  # Test 15 half steps so we wrap around
         motor.onestep(style=stepper.INTERLEAVE)
         for j in range(4):
             expected_value = 0
             # Even half steps should be DOUBLE coil active steps.
             if i % 2 == 0:
-                if j == i // 2 % 4 or j == (i // 2 + 1) %4:
-                    expected_value = 0xffff
+                if j == i // 2 % 4 or j == (i // 2 + 1) % 4:
+                    expected_value = 0xFFFF
             # Odd half steps should be SINGLE coil active steps
             elif j == (i // 2 + 1) % 4:
-                expected_value = 0xffff
+                expected_value = 0xFFFF
             assert coil[j].duty_cycle == expected_value
 
     motor.onestep(direction=stepper.BACKWARD, style=stepper.INTERLEAVE)
     assert coil[0].duty_cycle == 0
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xffff
+    assert coil[3].duty_cycle == 0xFFFF
+
 
 def test_microstep_steps():
     coil = (Coil(), Coil(), Coil(), Coil())
@@ -83,73 +90,75 @@ def test_microstep_steps():
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3], microsteps=2)
     # We always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
     motor.onestep(style=stepper.MICROSTEP)
-    assert coil[0].duty_cycle == 0xb504
-    assert coil[1].duty_cycle == 0xb504
+    assert coil[0].duty_cycle == 0xB504
+    assert coil[1].duty_cycle == 0xB504
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0
 
     motor.onestep(style=stepper.MICROSTEP)
     assert coil[0].duty_cycle == 0x0
-    assert coil[1].duty_cycle == 0xffff
+    assert coil[1].duty_cycle == 0xFFFF
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0
 
     motor.onestep(style=stepper.MICROSTEP)
     assert coil[0].duty_cycle == 0
-    assert coil[1].duty_cycle == 0xb504
-    assert coil[2].duty_cycle == 0xb504
+    assert coil[1].duty_cycle == 0xB504
+    assert coil[2].duty_cycle == 0xB504
     assert coil[3].duty_cycle == 0
 
     motor.onestep(direction=stepper.BACKWARD, style=stepper.MICROSTEP)
     assert coil[0].duty_cycle == 0x0
-    assert coil[1].duty_cycle == 0xffff
+    assert coil[1].duty_cycle == 0xFFFF
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0
 
+
 def test_double_to_single():
     coil = (Coil(), Coil(), Coil(), Coil())
     # We undo the coil order so our tests make more sense.
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3])
     # We always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
 
     motor.onestep(direction=stepper.BACKWARD, style=stepper.DOUBLE)
-    assert coil[0].duty_cycle == 0xffff
+    assert coil[0].duty_cycle == 0xFFFF
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xffff
+    assert coil[3].duty_cycle == 0xFFFF
 
     motor.onestep(direction=stepper.BACKWARD, style=stepper.SINGLE)
     assert coil[0].duty_cycle == 0
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xffff
+    assert coil[3].duty_cycle == 0xFFFF
 
     motor.onestep(direction=stepper.FORWARD, style=stepper.DOUBLE)
-    assert coil[0].duty_cycle == 0xffff
+    assert coil[0].duty_cycle == 0xFFFF
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xffff
+    assert coil[3].duty_cycle == 0xFFFF
 
     motor.onestep(direction=stepper.FORWARD, style=stepper.SINGLE)
-    assert coil[0].duty_cycle == 0xffff
+    assert coil[0].duty_cycle == 0xFFFF
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0
 
+
 def test_microstep_to_single():
     coil = (Coil(), Coil(), Coil(), Coil())
     # We undo the coil order so our tests make more sense.
     motor = stepper.StepperMotor(coil[2], coil[0], coil[1], coil[3])
     # We always start with a single step.
     for j in range(4):
-        assert coil[j].duty_cycle == (0xffff if j == 0 else 0)
+        assert coil[j].duty_cycle == (0xFFFF if j == 0 else 0)
 
     motor.onestep(direction=stepper.BACKWARD, style=stepper.MICROSTEP)
-    assert coil[0].duty_cycle == 0xfec3
+    assert coil[0].duty_cycle == 0xFEC3
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0x1918
@@ -158,16 +167,16 @@ def test_microstep_to_single():
     assert coil[0].duty_cycle == 0
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xffff
+    assert coil[3].duty_cycle == 0xFFFF
 
     motor.onestep(direction=stepper.FORWARD, style=stepper.MICROSTEP)
     assert coil[0].duty_cycle == 0x1918
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
-    assert coil[3].duty_cycle == 0xfec3
+    assert coil[3].duty_cycle == 0xFEC3
 
     motor.onestep(direction=stepper.FORWARD, style=stepper.SINGLE)
-    assert coil[0].duty_cycle == 0xffff
+    assert coil[0].duty_cycle == 0xFFFF
     assert coil[1].duty_cycle == 0
     assert coil[2].duty_cycle == 0
     assert coil[3].duty_cycle == 0