diff --git a/.flake8 b/.flake8
index 3aa19a9..8e25972 100644
--- a/.flake8
+++ b/.flake8
@@ -1,12 +1,8 @@
 [flake8]
 max-line-length = 88
 docstring-convention = google
-# Will finish these later
-extend-ignore = D101,D107
+ignore = D107, W503
 per-file-ignores =
-    tests/*.py: D1,D2,D4
-    examples/*.py: D1,D2,D4
-    __version__.py: D100
     __init__.py: F401
 exclude =
     airflow
@@ -16,6 +12,7 @@ exclude =
     setup.py
     build
     dist
+    tests
     .venv
     .tox
     .mypy_cache
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7534157..75a3dac 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -10,6 +10,8 @@ repos:
     hooks:
       - id: flake8
         additional_dependencies: [flake8-docstrings]
+        args: ["--config", ".flake8"]
+        exclude: tests/
 
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: v0.902
diff --git a/airflow_dbt_python/__version__.py b/airflow_dbt_python/__version__.py
index 8201c2f..c847a74 100644
--- a/airflow_dbt_python/__version__.py
+++ b/airflow_dbt_python/__version__.py
@@ -1,3 +1,4 @@
+"""The module's version information."""
 __author__ = "Tomás Farías Santana"
 __copyright__ = "Copyright 2021 Tomás Farías Santana"
 __title__ = "airflow-dbt-python"
diff --git a/airflow_dbt_python/hooks/dbt_s3.py b/airflow_dbt_python/hooks/dbt_s3.py
index 75d694f..37e46f1 100644
--- a/airflow_dbt_python/hooks/dbt_s3.py
+++ b/airflow_dbt_python/hooks/dbt_s3.py
@@ -7,6 +7,12 @@
 
 
 class DbtS3Hook(S3Hook):
+    """Subclass of S3Hook with methods to pull dbt-related files.
+
+    A dbt hook should provide a method to pull a dbt profiles file (profiles.yml) and
+    all the files corresponding to a project.
+    """
+
     def get_dbt_profiles(
         self, s3_profiles_url: str, profiles_dir: Optional[str] = None
     ) -> Path:
diff --git a/examples/__init__.py b/examples/__init__.py
index e69de29..8f6e936 100644
--- a/examples/__init__.py
+++ b/examples/__init__.py
@@ -0,0 +1 @@
+"""Usage examples of airflow-dbt-python."""
diff --git a/examples/basic_dag.py b/examples/basic_dag.py
index ce57e57..165e204 100644
--- a/examples/basic_dag.py
+++ b/examples/basic_dag.py
@@ -1,6 +1,4 @@
-"""
-Sample basic DAG which dbt runs a project
-"""
+"""Sample basic DAG which dbt runs a project."""
 import datetime as dt
 
 from airflow import DAG
diff --git a/examples/complete_dbt_workflow_dag.py b/examples/complete_dbt_workflow_dag.py
index 74ff87c..1f76d95 100644
--- a/examples/complete_dbt_workflow_dag.py
+++ b/examples/complete_dbt_workflow_dag.py
@@ -1,5 +1,6 @@
-"""
-Sample DAG showcasing a complete dbt workflow
+"""Sample DAG showcasing a complete dbt workflow.
+
+The complete workflow includes a sequence of source, seed, and several run commands.
 """
 import datetime as dt
 
diff --git a/examples/dbt_project_in_s3_dag.py b/examples/dbt_project_in_s3_dag.py
index 039a41b..7ed7eb7 100644
--- a/examples/dbt_project_in_s3_dag.py
+++ b/examples/dbt_project_in_s3_dag.py
@@ -1,6 +1,4 @@
-"""
-Sample basic DAG which showcases a dbt project being pulled from S3
-"""
+"""Sample basic DAG which showcases a dbt project being pulled from S3."""
 import datetime as dt
 
 from airflow import DAG
diff --git a/examples/use_dbt_artifacts_dag.py b/examples/use_dbt_artifacts_dag.py
index eeb3e87..8f2cc43 100644
--- a/examples/use_dbt_artifacts_dag.py
+++ b/examples/use_dbt_artifacts_dag.py
@@ -1,6 +1,4 @@
-"""
-Sample DAG to showcase pulling dbt artifacts from XCOM
-"""
+"""Sample DAG to showcase pulling dbt artifacts from XCOM."""
 import datetime as dt
 
 from airflow import DAG
@@ -10,9 +8,7 @@
 
 
 def process_dbt_artifacts(**context):
-    """
-    Report which model or models took the longest to compile and execute
-    """
+    """Report which model or models took the longest to compile and execute."""
     run_results = context["ti"].xcom_pull(
         key="run_results.json", task_ids="dbt_run_daily"
     )
diff --git a/tests/conftest.py b/tests/conftest.py
index fbfbb53..3d9e703 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,3 +1,8 @@
+"""Conftest file including setting common fixtures.
+
+Common fixtures include a connection to a postgres database, a set of sample model and
+ seed files, dbt configuration files, and temporary directories for everything.
+"""
 import boto3
 import pytest
 from dbt.version import __version__ as DBT_VERSION
diff --git a/tests/test_dbt_base.py b/tests/test_dbt_base.py
index 456b84d..52410d4 100644
--- a/tests/test_dbt_base.py
+++ b/tests/test_dbt_base.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtBaseOperator."""
 from pathlib import Path
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_build.py b/tests/test_dbt_build.py
index 90994a3..f84e792 100644
--- a/tests/test_dbt_build.py
+++ b/tests/test_dbt_build.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtBuildOperator."""
 import json
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_clean.py b/tests/test_dbt_clean.py
index fdf5316..606fd06 100644
--- a/tests/test_dbt_clean.py
+++ b/tests/test_dbt_clean.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtCleanOperator."""
 from unittest.mock import patch
 
 from airflow_dbt_python.operators.dbt import DbtCleanOperator, DbtCompileOperator
diff --git a/tests/test_dbt_compile.py b/tests/test_dbt_compile.py
index 24b427d..9eda40b 100644
--- a/tests/test_dbt_compile.py
+++ b/tests/test_dbt_compile.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtCompileOperator."""
 from unittest.mock import patch
 
 from dbt.contracts.results import RunStatus
diff --git a/tests/test_dbt_debug.py b/tests/test_dbt_debug.py
index f23e60a..9ef2e01 100644
--- a/tests/test_dbt_debug.py
+++ b/tests/test_dbt_debug.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtDebugOperator."""
 from unittest.mock import patch
 
 from dbt.version import __version__ as DBT_VERSION
diff --git a/tests/test_dbt_deps.py b/tests/test_dbt_deps.py
index 88a0463..f9ffc48 100644
--- a/tests/test_dbt_deps.py
+++ b/tests/test_dbt_deps.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtDepsOperator."""
 from unittest.mock import patch
 
 import pytest
diff --git a/tests/test_dbt_list.py b/tests/test_dbt_list.py
index c34e1e7..06bef0a 100644
--- a/tests/test_dbt_list.py
+++ b/tests/test_dbt_list.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtListOperator."""
 from itertools import chain
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_parse.py b/tests/test_dbt_parse.py
index a679d67..54b1db5 100644
--- a/tests/test_dbt_parse.py
+++ b/tests/test_dbt_parse.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtParseOperator."""
 from pathlib import Path
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_run.py b/tests/test_dbt_run.py
index 805559d..1e13139 100644
--- a/tests/test_dbt_run.py
+++ b/tests/test_dbt_run.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtRunOperator."""
 import json
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_run_operation.py b/tests/test_dbt_run_operation.py
index 3d8b7f4..908cc2a 100644
--- a/tests/test_dbt_run_operation.py
+++ b/tests/test_dbt_run_operation.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtRunOperationOperator."""
 from unittest.mock import patch
 
 import pytest
diff --git a/tests/test_dbt_s3_hook.py b/tests/test_dbt_s3_hook.py
index 936be43..7322eb2 100644
--- a/tests/test_dbt_s3_hook.py
+++ b/tests/test_dbt_s3_hook.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtS3Hook."""
 import pytest
 
 try:
diff --git a/tests/test_dbt_seed.py b/tests/test_dbt_seed.py
index c97ecf4..0f7a6ee 100644
--- a/tests/test_dbt_seed.py
+++ b/tests/test_dbt_seed.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtSeedOperator."""
 import json
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_snapshot.py b/tests/test_dbt_snapshot.py
index 6bdd31f..0eeb9f1 100644
--- a/tests/test_dbt_snapshot.py
+++ b/tests/test_dbt_snapshot.py
@@ -1,9 +1,10 @@
+"""Unit test module for DbtSnapshotOperator."""
 from unittest.mock import patch
 
 import pytest
-from airflow import AirflowException
 from dbt.contracts.results import RunStatus
 
+from airflow import AirflowException
 from airflow_dbt_python.operators.dbt import DbtSnapshotOperator
 
 
diff --git a/tests/test_dbt_source.py b/tests/test_dbt_source.py
index 3639b3d..d1a3de8 100644
--- a/tests/test_dbt_source.py
+++ b/tests/test_dbt_source.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtSourceOperator."""
 from pathlib import Path
 from unittest.mock import patch
 
diff --git a/tests/test_dbt_test.py b/tests/test_dbt_test.py
index dbad6bb..1c72a73 100644
--- a/tests/test_dbt_test.py
+++ b/tests/test_dbt_test.py
@@ -1,3 +1,4 @@
+"""Unit test module for DbtTestOperator."""
 from unittest.mock import patch
 
 import pytest