--- a/taskcluster/taskgraph/transforms/tests.py
+++ b/taskcluster/taskgraph/transforms/tests.py
@@ -658,17 +658,18 @@ def handle_suite_category(config, tests)
             if not any(arg.startswith(category_arg) for arg in extra):
                 extra.append('{}={}'.format(category_arg, flavor))
 
         yield test
 
 
 @transforms.add
 def enable_code_coverage(config, tests):
-    """Enable code coverage for the linux64-ccov/opt & linux64-jsdcov/opt & win64-ccov/debug build-platforms"""
+    """Enable code coverage for the linux64-ccov/opt & linux64-jsdcov/opt & win64-ccov/debug
+    build-platforms"""
     for test in tests:
         if 'ccov' in test['build-platform'] and not test['test-name'].startswith('test-verify'):
             test['mozharness'].setdefault('extra-options', []).append('--code-coverage')
             test['when'] = {}
             test['instance-size'] = 'xlarge'
             # Ensure we don't run on inbound/autoland/beta, but if the test is try only, ignore it
             if 'mozilla-central' in test['run-on-projects'] or \
                     test['run-on-projects'] == 'built-projects':