diff --git a/src/plumpy/base/utils.py b/src/plumpy/base/utils.py
index 2b9728e9..232c5d26 100644
--- a/src/plumpy/base/utils.py
+++ b/src/plumpy/base/utils.py
@@ -16,7 +16,7 @@ def wrapper(self: Any, *args: Any, **kwargs: Any) -> None:
         wrapped(self, *args, **kwargs)
         self._called -= 1
 
-    #the following is to show the correct name later in the call_with_super_check error message
+    # Forward wrapped function name to the decorator to show the correct name in the ``call_with_super_check``
     wrapper.__name__ = wrapped.__name__
     return wrapper
 
diff --git a/src/plumpy/event_helper.py b/src/plumpy/event_helper.py
index b36cd602..9da6ca9a 100644
--- a/src/plumpy/event_helper.py
+++ b/src/plumpy/event_helper.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 import logging
-from typing import TYPE_CHECKING, Any, Callable, Set, Type
+from typing import TYPE_CHECKING, Any, Callable
 
 from . import persistence
 
diff --git a/test/test_processes.py b/test/test_processes.py
index 4b7494f5..158cce66 100644
--- a/test/test_processes.py
+++ b/test/test_processes.py
@@ -800,9 +800,8 @@ def test_instance_state_with_outputs(self):
             # Check that it is a copy
             self.assertIsNot(outputs, bundle.get(BundleKeys.OUTPUTS, {}))
             # Check the contents are the same
-            #we remove the ProcessSaver instance that is an object used only for testing
+            # Remove the ``ProcessSaver`` instance that is only used for testing
             utils.compare_dictionaries(None, None, outputs, bundle.get(BundleKeys.OUTPUTS, {}), exclude={'_listeners'})
-            #self.assertDictEqual(outputs, bundle.get(BundleKeys.OUTPUTS, {}))
 
         self.assertIsNot(proc.outputs, saver.snapshots[-1].get(BundleKeys.OUTPUTS, {}))
 
@@ -877,7 +876,6 @@ def _check_round_trip(self, proc1):
         bundle2 = plumpy.Bundle(proc2)
 
         self.assertEqual(proc1.pid, proc2.pid)
-        #self.assertDictEqual(bundle1, bundle2)
         utils.compare_dictionaries(None, None, bundle1, bundle2, exclude={'_listeners'})
 
 
diff --git a/test/test_workchains.py b/test/test_workchains.py
index 6d9f26c5..c698aff9 100644
--- a/test/test_workchains.py
+++ b/test/test_workchains.py
@@ -304,11 +304,9 @@ def define(cls, spec):
                 )
 
             def step1(self):
-                print('step1')
                 persister.save_checkpoint(self, 'step1')
 
             def step2(self):
-                print('step2')
                 persister.save_checkpoint(self, 'step2')
 
         # add SimpleWorkChain and TestListener to this module global namespace, so they can be reloaded from checkpoint
@@ -321,7 +319,6 @@ def step2(self):
 
         self.assertEqual(process_finished_count, 1)
 
-        print('reload persister checkpoint:')
         workchain_checkpoint = persister.load_checkpoint(workchain.pid, 'step1').unbundle()
         workchain_checkpoint.execute()
         self.assertEqual(process_finished_count, 2)