diff --git a/kalash/collectors.py b/kalash/collectors.py
index 9a1706f..97a6cd5 100644
--- a/kalash/collectors.py
+++ b/kalash/collectors.py
@@ -9,6 +9,7 @@
 be relevant to a test definition. For example V1 template
 collection looks for `TestCase` instances.
 """
+__docformat__ = "google"
 
 from typing import Optional
 import unittest
diff --git a/kalash/config.py b/kalash/config.py
index ddc95b5..a0d45aa 100644
--- a/kalash/config.py
+++ b/kalash/config.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+__docformat__ = "google"
 __doc__ = """"""
 
 from collections import defaultdict
diff --git a/kalash/filter.py b/kalash/filter.py
index a7a1bc8..173a0d2 100644
--- a/kalash/filter.py
+++ b/kalash/filter.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 from typing import Dict, Union
 from unittest import TestSuite
 from functools import reduce
diff --git a/kalash/kalash_test_loader.py b/kalash/kalash_test_loader.py
index 56bee48..2ac761f 100644
--- a/kalash/kalash_test_loader.py
+++ b/kalash/kalash_test_loader.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 import os
 from typing import Callable
 import unittest
diff --git a/kalash/last_result_filter.py b/kalash/last_result_filter.py
index 5a7ff60..afe14af 100644
--- a/kalash/last_result_filter.py
+++ b/kalash/last_result_filter.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 import os
 import re
 import datetime
diff --git a/kalash/log.py b/kalash/log.py
index 77f35d3..a650a44 100644
--- a/kalash/log.py
+++ b/kalash/log.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 import os
 import sys
 import logging
diff --git a/kalash/metaparser.py b/kalash/metaparser.py
index c41ddeb..b39f001 100644
--- a/kalash/metaparser.py
+++ b/kalash/metaparser.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 from typing import Any, Dict, List, Optional, Union
 
 import yaml
diff --git a/kalash/run.py b/kalash/run.py
index db248f5..f43bc16 100644
--- a/kalash/run.py
+++ b/kalash/run.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 import unittest
 import argparse
 import xmlrunner
diff --git a/kalash/smuggle.py b/kalash/smuggle.py
index 2c3e64c..55ba203 100644
--- a/kalash/smuggle.py
+++ b/kalash/smuggle.py
@@ -2,6 +2,8 @@
 Adapted from: https://pypi.org/project/smuggle/ with minor changes
 related to path handling.
 """
+__docformat__ = "google"
+
 import inspect
 import os
 import sys
diff --git a/kalash/spec.py b/kalash/spec.py
index e97f381..557ac90 100644
--- a/kalash/spec.py
+++ b/kalash/spec.py
@@ -1,4 +1,7 @@
 from __future__ import annotations
+
+__docformat__ = "google"
+
 from dataclasses import dataclass
 from typing import Dict, List
 
diff --git a/kalash/test_case.py b/kalash/test_case.py
index 4984fe6..1e5123e 100644
--- a/kalash/test_case.py
+++ b/kalash/test_case.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 from typing import List, Optional
 import unittest
 import logging
diff --git a/kalash/utils.py b/kalash/utils.py
index 9834682..a520c33 100644
--- a/kalash/utils.py
+++ b/kalash/utils.py
@@ -1,3 +1,5 @@
+__docformat__ = "google"
+
 import datetime