diff --git a/CHANGELOG.md b/CHANGELOG.md
index b604f17..b62b853 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,16 +2,17 @@
 
 ## Unreleased
 
+### Fixed
+
+ - prevent an exception if the `log_dir` for the `OhsomeClient` was set to `None`
+ - removed time-dependency of unit tests that would cause them to fail at any time after the cassettes were recorded
+
 ### Changed
 
  - relaxed dependency requirement for `urllib3` to >=2.0.2 to prevent ohsome-py from becoming a 'diamond-dependency'
  - improved and sped up testing (first steps towards [#139](https://github.com/GIScience/ohsome-py/issues/139))
  - move metadata property from singleton to `chached_property`
 
-### Fixed
-
- - removed time-dependency of unit tests that would cause them to fail at any time after the cassettes were recorded
-
 ## 0.3.0
 
 ### Added
diff --git a/ohsome/clients.py b/ohsome/clients.py
index 40ed76b..4053e33 100644
--- a/ohsome/clients.py
+++ b/ohsome/clients.py
@@ -56,7 +56,7 @@ def __init__(
         RetryError by the underlying library.
         """
         self.log = log
-        self.log_dir = Path(log_dir)
+        self.log_dir = Path(log_dir or DEFAULT_LOG_DIR)
         if self.log:
             self.log_dir.mkdir(parents=True, exist_ok=True)
         if base_api_url is not None:
diff --git a/ohsome/test/test_client.py b/ohsome/test/test_client.py
index c0c3767..77f53bf 100644
--- a/ohsome/test/test_client.py
+++ b/ohsome/test/test_client.py
@@ -11,6 +11,7 @@
 import pytest
 
 import ohsome
+from ohsome import OhsomeClient
 from ohsome.constants import OHSOME_VERSION
 
 script_path = os.path.dirname(os.path.realpath(__file__))
@@ -318,3 +319,15 @@ def test_post_with_endpoint_string(base_client):
 
     assert isinstance(result, gpd.GeoDataFrame)
     assert len(result) == 1
+
+
+def test_none_init():
+    """Test if the input parameters can set to None explicitly."""
+    assert OhsomeClient(
+        base_api_url=None,
+        log=None,
+        log_dir=None,
+        cache=None,
+        user_agent=None,
+        retry=None,
+    )