diff --git a/.env.sample b/.env.sample
index 684e4cb1..6ec09d4a 100644
--- a/.env.sample
+++ b/.env.sample
@@ -1,6 +1,6 @@
-MYSQL_HOST=localhost:3306
+MYSQL_HOST=127.0.0.1
 MYSQL_PORT=3306
-MYSQL_USER=
-MYSQL_PASSWORD=
+MYSQL_USER=root
+MYSQL_PASSWORD=root
 MYSQL_DB_NAME=test_cc
 MYSQL_TABLE_NAME=ccindex
diff --git a/.github/workflows/test_and_types.yml b/.github/workflows/test_and_types.yml
index b119a918..e9186d34 100644
--- a/.github/workflows/test_and_types.yml
+++ b/.github/workflows/test_and_types.yml
@@ -38,7 +38,7 @@ jobs:
         run: cp .env.sample .env
 
       - name: Run tests
-        run: python -m unittest discover -s tests -p "athena_tests.py"  # Replace with your test command
+        run: python -m unittest discover -s tests -p "*_tests.py"  # Replace with your test command
 
   lint_and_types:
     runs-on: ubuntu-latest
diff --git a/cmoncrawl/aggregator/athena_query.py b/cmoncrawl/aggregator/athena_query.py
index c7bf1f63..8d984dba 100644
--- a/cmoncrawl/aggregator/athena_query.py
+++ b/cmoncrawl/aggregator/athena_query.py
@@ -4,7 +4,7 @@
 from datetime import datetime
 from pathlib import Path
 import tempfile
-from typing import Any, AsyncIterable, AsyncIterator, Deque, List, Optional, Set, Tuple
+from typing import Any, AsyncIterable, AsyncIterator, Deque, List, Optional, Set
 import uuid
 import hashlib
 
@@ -122,7 +122,7 @@ def __init__(
         max_retry: int = 5,
         extra_sql_where_clause: str | None = None,
         batch_size: int = 1,
-        aws_profile: str = "default",
+        aws_profile: Optional[str] = None,
         bucket_name: Optional[str] = None,
         catalog_name: str = "AwsDataCatalog",
         database_name: str = "commoncrawl",
diff --git a/cmoncrawl/integrations/commands.py b/cmoncrawl/integrations/commands.py
index 1bda91e4..18528dc1 100644
--- a/cmoncrawl/integrations/commands.py
+++ b/cmoncrawl/integrations/commands.py
@@ -1,5 +1,4 @@
 import argparse
-import logging
 from typing import Any, Dict
 from cmoncrawl.integrations.download import add_args as add_download_args
 from cmoncrawl.integrations.extract import add_args as add_extract_args
diff --git a/cmoncrawl/middleware/stompware.py b/cmoncrawl/middleware/stompware.py
index 725eca83..f6b87363 100644
--- a/cmoncrawl/middleware/stompware.py
+++ b/cmoncrawl/middleware/stompware.py
@@ -312,7 +312,7 @@ async def process(self):
                         extracted_num += 1
                 else:
                     all_purpose_logger.info(f"Failed to extract {message.dr.url}")
-        except Exception as e:
+        except Exception:
             pass
 
         finally:
diff --git a/cmoncrawl/middleware/synchronized.py b/cmoncrawl/middleware/synchronized.py
index 320cc0b9..ea9dcddc 100644
--- a/cmoncrawl/middleware/synchronized.py
+++ b/cmoncrawl/middleware/synchronized.py
@@ -40,7 +40,7 @@ async def query_and_extract(
                     await pipeline.process_domain_record(domain_record, {})
                     total_extracted += 1
                     processed_urls.add(unify_url_id(url))
-                except KeyboardInterrupt as e:
+                except KeyboardInterrupt:
                     break
 
                 except Exception as e:
@@ -116,12 +116,11 @@ async def extract(
             for task in done:
                 try:
                     total_extracted += len(await task)
-                except KeyboardInterrupt as e:
+                except KeyboardInterrupt:
                     break
 
-                except Exception as _:
+                except Exception:
                     all_purpose_logger.error(f"Error in task {task}", exc_info=True)
-                    pass
     except Exception as e:
         all_purpose_logger.error(e, exc_info=True)
 
diff --git a/extractors/my_extractor.py b/extractors/my_extractor.py
index 2fa9b8b3..0fa27b43 100644
--- a/extractors/my_extractor.py
+++ b/extractors/my_extractor.py
@@ -1,28 +1,30 @@
 from bs4 import BeautifulSoup
 from cmoncrawl.common.types import PipeMetadata
 from cmoncrawl.processor.pipeline.extractor import BaseExtractor
+
+
 class MyExtractor(BaseExtractor):
-   def __init__(self):
-      # you can force a specific encoding if you know it
-      super().__init__(encoding=None)
+    def __init__(self):
+        # you can force a specific encoding if you know it
+        super().__init__(encoding=None)
+
+    def extract_soup(self, soup: BeautifulSoup, metadata: PipeMetadata):
+        # here you can extract the data you want from the soup
+        # and return a dict with the data you want to save
+        body = soup.select_one("body")
+        if body is None:
+            return None
+        return {"body": body.get_text()}
+
+    # You can also override the following methods to drop the files you don't want to extracti
+    # Return True to keep the file, False to drop it
+    def filter_raw(self, response: str, metadata: PipeMetadata) -> bool:
+        return True
 
-   def extract_soup(self, soup: BeautifulSoup, metadata: PipeMetadata):
-      # here you can extract the data you want from the soup
-      # and return a dict with the data you want to save
-      body = soup.select_one("body")
-      if body is None:
-        return None
-      return {
-         "body": body.get_text()
-      }
+    def filter_soup(self, soup: BeautifulSoup, metadata: PipeMetadata) -> bool:
+        return True
 
-   # You can also override the following methods to drop the files you don't want to extracti
-   # Return True to keep the file, False to drop it
-   def filter_raw(self, response: str, metadata: PipeMetadata) -> bool:
-      return True
-   def filter_soup(self, soup: BeautifulSoup, metadata: PipeMetadata) -> bool:
-      return True
 
 # Make sure to instantiate your extractor into extractor variable
 # The name must match so that the framework can find it
-extractor = MyExtractor()
\ No newline at end of file
+extractor = MyExtractor()
diff --git a/tests/athena_tests.py b/tests/athena_tests.py
index 50332017..6eac6f6b 100644
--- a/tests/athena_tests.py
+++ b/tests/athena_tests.py
@@ -6,7 +6,7 @@
 from unittest.mock import patch
 
 import boto3
-from tests.utils import MySQLRecordsDB
+from tests.utils import MySQLRecordsDB, set_up_aws_credentials_testing
 import aioboto3
 
 from cmoncrawl.aggregator.athena_query import (
@@ -120,6 +120,7 @@ async def asyncSetUp(self) -> None:
             "https://index.commoncrawl.org/CC-MAIN-2021-09-index",
             "https://index.commoncrawl.org/CC-MAIN-2020-50-index",
         ]
+        set_up_aws_credentials_testing()
 
     def test_prepare_athena_sql_query_multiple_urls(self):
         query = prepare_athena_sql_query(
@@ -242,6 +243,7 @@ def setUp(self) -> None:
         self.mock_s3.start()
         self.mock_athena = mock_athena()
         self.mock_athena.start()
+        set_up_aws_credentials_testing()
 
     def tearDown(self) -> None:
         self.mock_s3.stop()
@@ -546,7 +548,7 @@ async def test_batch_size_zero(self):
 
     async def test_extra_sql_where(self):
         self.domains = ["seznam.cz"]
-        where_clause = "cc.fetch_status != 200"
+        where_clause = 'cc.warc_filename = "filename1"'
         self.iterator = AthenaAggregator.AthenaAggregatorIterator(
             aws_client=self.aws_client,
             domains=self.domains,
diff --git a/tests/utils.py b/tests/utils.py
index 6b4f2d50..e98ae567 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -27,7 +27,7 @@ def seed_db(self):
                     100,
                     200,
                     "CC-MAIN-2021-05",
-                    100,
+                    200,
                     "warc",
                 ],
                 [
@@ -130,3 +130,13 @@ def setUp(self):
     def tearDown(self):
         self.remove_db()
         self.db.close()
+
+
+def set_up_aws_credentials_testing():
+    import os
+
+    os.environ["AWS_ACCESS_KEY_ID"] = "testing"
+    os.environ["AWS_SECRET_ACCESS_KEY"] = "testing"
+    os.environ["AWS_SECURITY_TOKEN"] = "testing"
+    os.environ["AWS_SESSION_TOKEN"] = "testing"
+    os.environ["AWS_DEFAULT_REGION"] = "us-east-1"