diff --git a/nwb_linkml/src/nwb_linkml/includes/hdmf.py b/nwb_linkml/src/nwb_linkml/includes/hdmf.py
index 6c0c8bc..58cfb8c 100644
--- a/nwb_linkml/src/nwb_linkml/includes/hdmf.py
+++ b/nwb_linkml/src/nwb_linkml/includes/hdmf.py
@@ -340,7 +340,7 @@ class DynamicTableMixin(BaseModel):
                     )
                 )
             except Exception:
-                raise e
+                raise e from None
 
 
 class VectorDataMixin(BaseModel, Generic[T]):
diff --git a/nwb_linkml/tests/test_logging.py b/nwb_linkml/tests/test_logging.py
index 4585ed1..ddabac1 100644
--- a/nwb_linkml/tests/test_logging.py
+++ b/nwb_linkml/tests/test_logging.py
@@ -22,7 +22,7 @@ def test_init_logger(capsys, tmp_path):
     captured = capsys.readouterr()
     assert "WARNING" in captured.out
 
-    with open(log_file, "r") as lfile:
+    with open(log_file) as lfile:
         log_str = lfile.read()
     assert "WARNING" in log_str
 
@@ -30,6 +30,6 @@ def test_init_logger(capsys, tmp_path):
     logger.info(info_msg)
     captured = capsys.readouterr()
     assert "INFO" in captured.out
-    with open(log_file, "r") as lfile:
+    with open(log_file) as lfile:
         log_str = lfile.read()
     assert "INFO" not in log_str