diff --git a/axe_selenium_python/axe.py b/axe_selenium_python/axe.py
index 6e3bed8..8c74072 100755
--- a/axe_selenium_python/axe.py
+++ b/axe_selenium_python/axe.py
@@ -33,8 +33,10 @@ def execute(self, context=None, options=None):
         :param context: which page part(s) to analyze and/or what to exclude.
         :param options: dictionary of aXe options.
         """
-        template = "var callback = arguments[arguments.length - 1];" \
-                   "axe.run(%s).then(results => callback(results))"
+        template = (
+            "var callback = arguments[arguments.length - 1];"
+            + "axe.run(%s).then(results => callback(results))"
+        )
         args = ""
 
         # If context parameter is passed, add to args
diff --git a/axe_selenium_python/tests/test_axe.py b/axe_selenium_python/tests/test_axe.py
index 0c99c3a..4217572 100755
--- a/axe_selenium_python/tests/test_axe.py
+++ b/axe_selenium_python/tests/test_axe.py
@@ -23,10 +23,13 @@ def firefox_driver():
 def chrome_driver():
     opts = webdriver.ChromeOptions()
     opts.headless = True
-    opts.add_argument('--no-sandbox')
-    driver_path = getenv('CHROMEDRIVER_PATH')
-    driver = webdriver.Chrome(options=opts, executable_path=driver_path) \
-        if driver_path else webdriver.Chrome(options=opts)
+    opts.add_argument("--no-sandbox")
+    driver_path = getenv("CHROMEDRIVER_PATH")
+    driver = (
+        webdriver.Chrome(options=opts, executable_path=driver_path)
+        if driver_path
+        else webdriver.Chrome(options=opts)
+    )
     yield driver
     driver.close()