diff --git a/nipype/__init__.py b/nipype/__init__.py
index 22e6f97c2d..54872f193e 100644
--- a/nipype/__init__.py
+++ b/nipype/__init__.py
@@ -25,7 +25,7 @@
     import faulthandler
 
     faulthandler.enable()
-except (ImportError, OSError) as e:
+except (ImportError, OSError):
     pass
 
 config = NipypeConfig()
diff --git a/nipype/interfaces/cmtk/tests/test_nbs.py b/nipype/interfaces/cmtk/tests/test_nbs.py
index 51ea9580cd..efc8aed678 100644
--- a/nipype/interfaces/cmtk/tests/test_nbs.py
+++ b/nipype/interfaces/cmtk/tests/test_nbs.py
@@ -8,7 +8,7 @@
 have_cv = True
 try:
     package_check("cviewer")
-except Exception as e:
+except Exception:
     have_cv = False
 
 
@@ -39,7 +39,7 @@ def test_importerror(creating_graphs, tmpdir):
     nbs.inputs.in_group2 = group2
     nbs.inputs.edge_key = "weight"
 
-    with pytest.raises(ImportError) as e:
+    with pytest.raises(ImportError):
         nbs.run()
 
 
diff --git a/nipype/interfaces/io.py b/nipype/interfaces/io.py
index eb64dd141d..46cdfb44f2 100644
--- a/nipype/interfaces/io.py
+++ b/nipype/interfaces/io.py
@@ -530,7 +530,7 @@ def _fetch_bucket(self, bucket_name):
         try:
             import boto3
             import botocore
-        except ImportError as exc:
+        except ImportError:
             err_msg = "Boto3 package is not installed - install boto3 and try again."
             raise Exception(err_msg)
 
@@ -572,7 +572,7 @@ def _fetch_bucket(self, bucket_name):
         # And try fetch the bucket with the name argument
         try:
             _get_head_bucket(s3_resource, bucket_name)
-        except Exception as exc:
+        except Exception:
             # Try to connect anonymously
             s3_resource.meta.client.meta.events.register(
                 "choose-signer.s3.*", botocore.handlers.disable_signing
@@ -2619,7 +2619,6 @@ def _list_outputs(self):
                             )
                         if len(arg) > maxlen:
                             maxlen = len(arg)
-                outfiles = []
                 for i in range(maxlen):
                     argtuple = []
                     for arg in arglist:
diff --git a/nipype/interfaces/tests/test_io.py b/nipype/interfaces/tests/test_io.py
index d0af921f09..fc7f03db9f 100644
--- a/nipype/interfaces/tests/test_io.py
+++ b/nipype/interfaces/tests/test_io.py
@@ -565,7 +565,7 @@ def test_freesurfersource():
 
 def test_freesurfersource_incorrectdir():
     fss = nio.FreeSurferSource()
-    with pytest.raises(TraitError) as err:
+    with pytest.raises(TraitError):
         fss.inputs.subjects_dir = "path/to/no/existing/directory"
 
 
diff --git a/nipype/interfaces/utility/tests/test_csv.py b/nipype/interfaces/utility/tests/test_csv.py
index 8a8f06e509..2ce78876cc 100644
--- a/nipype/interfaces/utility/tests/test_csv.py
+++ b/nipype/interfaces/utility/tests/test_csv.py
@@ -29,7 +29,6 @@ def test_csvReader(tmpdir):
 
 
 def test_csvReader_quoted(tmpdir):
-    header = "files,labels,erosion\n"
     lines = ['foo,"hello, world",300.1\n']
 
     name = tmpdir.join("testfile.csv").strpath
diff --git a/nipype/pipeline/plugins/base.py b/nipype/pipeline/plugins/base.py
index 1ea62c890e..1571ab71a9 100644
--- a/nipype/pipeline/plugins/base.py
+++ b/nipype/pipeline/plugins/base.py
@@ -541,7 +541,7 @@ def _get_result(self, taskid):
                     "Node working directory: ({}) ".format(taskid, timeout, node_dir)
                 )
                 raise OSError(error_message)
-            except OSError as e:
+            except OSError:
                 result_data["traceback"] = "\n".join(format_exception(*sys.exc_info()))
         else:
             results_file = glob(os.path.join(node_dir, "result_*.pklz"))[0]
diff --git a/nipype/pipeline/plugins/tests/test_sgelike.py b/nipype/pipeline/plugins/tests/test_sgelike.py
index a150309e1f..26c3d70a06 100644
--- a/nipype/pipeline/plugins/tests/test_sgelike.py
+++ b/nipype/pipeline/plugins/tests/test_sgelike.py
@@ -27,7 +27,7 @@ def test_crashfile_creation(tmp_path):
     pipe.config["execution"]["crashdump_dir"] = str(tmp_path)
     pipe.add_nodes([pe.Node(interface=Function(function=crasher), name="crasher")])
     sgelike_plugin = SGELikeBatchManagerBase("")
-    with pytest.raises(RuntimeError) as e:
+    with pytest.raises(RuntimeError):
         assert pipe.run(plugin=sgelike_plugin)
 
     crashfiles = list(tmp_path.glob("crash*crasher*.pklz")) + list(
diff --git a/nipype/sphinxext/plot_workflow.py b/nipype/sphinxext/plot_workflow.py
index ca95f56fa3..74745f99cb 100644
--- a/nipype/sphinxext/plot_workflow.py
+++ b/nipype/sphinxext/plot_workflow.py
@@ -672,7 +672,7 @@ def _dummy_print(*arg, **kwarg):
             exec(code, ns)
             if function_name is not None:
                 exec(function_name + "()", ns)
-        except (Exception, SystemExit) as err:
+        except (Exception, SystemExit):
             raise GraphError(traceback.format_exc())
     finally:
         os.chdir(pwd)
diff --git a/nipype/utils/profiler.py b/nipype/utils/profiler.py
index 370097e90b..cc2b4f7905 100644
--- a/nipype/utils/profiler.py
+++ b/nipype/utils/profiler.py
@@ -10,7 +10,7 @@
 
 try:
     import psutil
-except ImportError as exc:
+except ImportError:
     psutil = None