diff --git a/jwql/jwql_monitors/monitor_filesystem.py b/jwql/jwql_monitors/monitor_filesystem.py
index 5fb99d628..a78711e5d 100755
--- a/jwql/jwql_monitors/monitor_filesystem.py
+++ b/jwql/jwql_monitors/monitor_filesystem.py
@@ -75,6 +75,7 @@
 THUMBNAILS = SETTINGS['thumbnail_filesystem']
 LOGS = SETTINGS['log_dir']
 
+
 def files_per_filter():
     """Querying MAST (rather than looping through the filesystem), determine how
     many files use each filter for each instrument. Note that thiw function takes
@@ -94,7 +95,7 @@ def files_per_filter():
         for fname in FILTERS_PER_INSTRUMENT[instrument]:  # note that this does not include pupil wheel-based filters
             obs = Observations.query_criteria(filters=fname, instrument_name=JWST_INSTRUMENT_NAMES_MIXEDCASE[instrument])
             batch_size = 5
-            batches = [obs[i:i+batch_size] for i in range(0, len(obs), batch_size)]
+            batches = [obs[i : i + batch_size] for i in range(0, len(obs), batch_size)]
 
             obs_table = [Observations.get_product_list(batch) for batch in batches]
             products = unique(vstack(obs_table), keys='productFilename')
diff --git a/jwql/tests/test_utils.py b/jwql/tests/test_utils.py
index 7effb4d0f..121a0dbec 100644
--- a/jwql/tests/test_utils.py
+++ b/jwql/tests/test_utils.py
@@ -512,32 +512,32 @@ def test_validate_config():
             "host": "",
             "port": ""
         },
-        "django_databases" : {
+        "django_databases": {
             "default": {
-                "ENGINE" : "",
-                "NAME" : "",
-                "USER" : "",
-                "PASSWORD" : "",
-                "HOST" : "",
-                "PORT" : ""
+                "ENGINE": "",
+                "NAME": "",
+                "USER": "",
+                "PASSWORD": "",
+                "HOST": "",
+                "PORT": ""
             },
             "monitors": {
-                "ENGINE" : "",
-                "NAME" : "",
-                "USER" : "",
-                "PASSWORD" : "",
-                "HOST" : "",
-                "PORT" : ""
+                "ENGINE": "",
+                "NAME": "",
+                "USER": "",
+                "PASSWORD": "",
+                "HOST": "",
+                "PORT": ""
             }
         },
-        "django_debug" : "",
+        "django_debug": "",
         "jwql_dir": "",
         "jwql_version": "",
         "server_type": "",
         "log_dir": "",
         "mast_token": "",
         "outputs": "",
-        "working" : "",
+        "working": "",
         "preview_image_filesystem": "",
         "filesystem": "",
         "setup_file": "",
diff --git a/jwql/utils/utils.py b/jwql/utils/utils.py
index b141f9ad0..d96388d9a 100644
--- a/jwql/utils/utils.py
+++ b/jwql/utils/utils.py
@@ -602,7 +602,7 @@ def filename_parser(filename):
     except AttributeError:
         filename_dict = {'recognized_filename': False}
         logging.exception((f'\nFile; {filename} was not recognized by filename_parser(). Update parser or '
-                         'constants.py if it should be recognized.\n'))
+                           'constants.py if it should be recognized.\n'))
 
     return filename_dict