diff --git a/pycallgraph/output/output.py b/pycallgraph/output/output.py
index 662d563..f6f3efa 100644
--- a/pycallgraph/output/output.py
+++ b/pycallgraph/output/output.py
@@ -116,7 +116,7 @@ def debug(self, text):
         self.processor.config.log_debug(text)
 
     @classmethod
-    def add_output_file(cls, subparser, defaults, help):
+    def add_output_file(cls, subparser, defaults, help):  # noqa: A002
         subparser.add_argument(
             '-o', '--output-file', type=str, default=defaults.output_file,
             help=help,
diff --git a/pycallgraph/pycallgraph.py b/pycallgraph/pycallgraph.py
index 6af5428..73e018b 100644
--- a/pycallgraph/pycallgraph.py
+++ b/pycallgraph/pycallgraph.py
@@ -33,7 +33,7 @@ def __init__(self, output=None, config=None):
     def __enter__(self):
         self.start()
 
-    def __exit__(self, type, value, traceback):
+    def __exit__(self, type, value, traceback):  # noqa: A002
         self.done()
 
     def get_tracer_class(self):
diff --git a/pycallgraph/tracer.py b/pycallgraph/tracer.py
index ffcab15..f83cf42 100644
--- a/pycallgraph/tracer.py
+++ b/pycallgraph/tracer.py
@@ -372,4 +372,5 @@ def wrapper(*rest):
 
     return wrapper
 
+
 inspect.getmodule = simple_memoize(inspect.getmodule)