diff --git a/openeo/extra/job_management.py b/openeo/extra/job_management.py
index 23e93e18f..405fc1e52 100644
--- a/openeo/extra/job_management.py
+++ b/openeo/extra/job_management.py
@@ -5,12 +5,13 @@
 import logging
 import time
 from pathlib import Path
-from typing import Callable, Union, Dict, Optional
+from typing import Callable, Dict, Optional, Union
 
 import geopandas as gpd
 import pandas as pd
 import requests
-from openeo import Connection, BatchJob
+
+from openeo import BatchJob, Connection
 from openeo.rest import OpenEoApiError
 from openeo.util import deep_get
 
@@ -42,7 +43,7 @@ def start_job(row, connection, **kwargs):
     """
 
     def __init__(self, poll_sleep: int = 60):
-        """Create a MultiBackendJobManager
+        """Create a MultiBackendJobManager.
 
         :param poll_sleep: How many seconds to sleep between polls.
         """
@@ -55,7 +56,16 @@ def add_backend(
         connection: Union[Connection, Callable[[], Connection]],
         parallel_jobs: int = 2,
     ):
-        """Register a backend with a name and a Connection getter"""
+        """
+        Register a backend with a name and a Connection getter.
+
+        :param name:
+            Name of the backend.
+        :param connection:
+            Either a Connection to the backend, or a callable to create a backend connection.
+        :param parallel_jobs:
+            Maximum number of jobs to allow in parallel on a backend.
+        """
         if isinstance(connection, Connection):
             c = connection
             connection = lambda: c
@@ -65,6 +75,12 @@ def add_backend(
         )
 
     def _normalize_df(self, df: pd.DataFrame) -> pd.DataFrame:
+        """Ensure we have the required columns and the expected type for the geometry column.
+
+        :param df: The dataframe to normalize.
+        :return: a new dataframe that is normalized.
+        """
+
         # check for some required columns.
         required_with_default = [
             ("status", "not_started"),
@@ -192,7 +208,7 @@ def on_job_done(self, job: BatchJob, row):
 
         Default implementation downloads the results into a folder containing the title.
 
-        :param job: the job that has finished.
+        :param job: The job that has finished.
         :param row: DataFrame row containing the job's metadata.
         """
         # TODO: param `row` is never accessed in this method. Remove it? Is this intended for future use?
@@ -203,16 +219,26 @@ def on_job_done(self, job: BatchJob, row):
             json.dump(job_metadata, f, ensure_ascii=False)
 
     def on_job_error(self, job: BatchJob, row):
+        """
+        Handles jobs that stopped with errors.  Can be overridden to provide custom behaviour.
+
+        Default implementation writes the error logs to a JSON file.
+
+        :param job: The job that has finished.
+        :param row: DataFrame row containing the job's metadata.
+        """
+        # TODO: param `row` is never accessed in this method. Remove it? Is this intended for future use?
+
         logs = job.logs()
         error_logs = [l for l in logs if l.level.lower() == "error"]
         job_metadata = job.describe_job()
 
         title = job_metadata["title"]
         if len(error_logs) > 0:
-            (f"job_{title}_errors.json").write_text(json.dumps(error_logs, indent=2))
+            f"job_{title}_errors.json".write_text(json.dumps(error_logs, indent=2))
 
     def _update_statuses(self, df: pd.DataFrame):
-        """Update status (and stats) of running jobs (in place)"""
+        """Update status (and stats) of running jobs (in place)."""
         active = df.loc[
             (df.status == "created")
             | (df.status == "queued")
diff --git a/tests/extra/test_job_management.py b/tests/extra/test_job_management.py
index 7219d14f8..83861a1c7 100644
--- a/tests/extra/test_job_management.py
+++ b/tests/extra/test_job_management.py
@@ -1,13 +1,12 @@
-import openeo
-import pandas as pd
-from openeo.rest.job import RESTJob
-
-from openeo.extra.job_management import MultiBackendJobManager
+import os
+from pathlib import Path
 
+import pandas as pd
 import pytest
-import os
 
-from pathlib import Path
+import openeo
+from openeo.extra.job_management import MultiBackendJobManager
+from openeo.rest.job import RESTJob
 
 
 @pytest.fixture