diff --git a/check_done/config.py b/check_done/config.py
index 4218e54..8df9e14 100644
--- a/check_done/config.py
+++ b/check_done/config.py
@@ -138,11 +138,9 @@ def default_config_path() -> Path:
     previous_config_folder = None
     result = None
     while result is None and config_folder != previous_config_folder:
-        # TODO#32 Check yaml and yml, if both exist yaml is picked over yml.
-        config_path_to_check = (config_folder / CONFIG_BASE_NAME).with_suffix(".yaml")
-        if config_path_to_check.is_file():
-            result = config_path_to_check
-        else:
+        config_paths_to_check = [(config_folder / CONFIG_BASE_NAME).with_suffix(suffix) for suffix in [".yaml", ".yml"]]
+        result = next((path for path in config_paths_to_check if path.is_file()), None)
+        if result is None:
             previous_config_folder = config_folder
             config_folder = config_folder.parent
     if result is None:
diff --git a/tests/test_config.py b/tests/test_config.py
index 5791aff..d3c3a68 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -183,6 +183,27 @@ def test_can_resolve_config_default_path():
     assert actual_config_path == expected_config_path
 
 
+def test_can_resolve_default_config_path_with_yml_file_suffix():
+    with tempfile.TemporaryDirectory() as temp_folder, change_current_folder(temp_folder):
+        current_folder = Path(os.getcwd())
+        expected_config_path = (current_folder / CONFIG_BASE_NAME).with_suffix(".yml")
+        expected_config_path.write_text("")
+        actual_config_path = default_config_path()
+    assert actual_config_path == expected_config_path
+
+
+def test_can_resolve_default_config_path_when_both_yaml_and_yml_config_files_exist():
+    with tempfile.TemporaryDirectory() as temp_folder, change_current_folder(temp_folder):
+        current_folder = Path(os.getcwd())
+        current_folder = Path(os.getcwd())
+        expected_config_path_with_prioritized_yaml_suffix = (current_folder / CONFIG_BASE_NAME).with_suffix(".yaml")
+        expected_config_path_with_prioritized_yaml_suffix.write_text("")
+        another_valid_config_path_with_yml_suffix = (current_folder / CONFIG_BASE_NAME).with_suffix(".yml")
+        another_valid_config_path_with_yml_suffix.write_text("")
+        actual_config_path = default_config_path()
+    assert actual_config_path == expected_config_path_with_prioritized_yaml_suffix
+
+
 def test_fails_on_missing_default_config_path():
     with (
         tempfile.TemporaryDirectory() as temp_folder,