diff --git a/tests/fixtures/supporting_nodes.py b/tests/fixtures/supporting_nodes.py
index cca09e2cb..2ad7fe25d 100644
--- a/tests/fixtures/supporting_nodes.py
+++ b/tests/fixtures/supporting_nodes.py
@@ -11,11 +11,54 @@ def complex_file_node() -> cript.File:
     """
     complex file node with only required arguments
     """
-    my_file = cript.File(name="my complex file node fixture", source="https://criptapp.org", type="calibration", extension=".csv", data_dictionary="my file's data dictionary")
+    # TODO add notes="my complex URL file source notes" since this is a complex node
+    #   and update all other tests that depend on this fixture and addition of notes would throw them off
+    my_file = cript.File(
+        name="my complex file node fixture",
+        source="https://criptapp.org",
+        type="calibration",
+        extension=".csv",
+        data_dictionary="my file's data dictionary",
+    )
 
     return my_file
 
 
+@pytest.fixture(scope="function")
+def complex_local_file_node(tmp_path_factory) -> cript.File:
+    """
+    complex local file node with all possible arguments
+
+    1. create a temporary file and get its file path
+    1. create a unique string
+    1. write unique string to temporary file
+    1. create a file node with the source being the temporary file
+    """
+    # create unique string
+    import datetime
+    import uuid
+
+    file_text: str = (
+        f"This is an automated test from the Python SDK within "
+        f"`tests/nodes/supporting_nodes/test_file.py/test_local_file_source_upload_and_download()` "
+        f"checking that the file source is automatically and correctly uploaded to AWS S3. "
+        f"The test is conducted on UTC time of '{datetime.datetime.utcnow()}' "
+        f"with the unique UUID of '{str(uuid.uuid4())}'"
+    )
+
+    # create a temp file and write to it
+    local_file_dir = tmp_path_factory.mktemp("complex_local_file_node_fixture_dir")
+    local_file_path = local_file_dir / "my_local_file_fixture.txt"
+    local_file_path.write_text(file_text)
+
+    # create file node with source being a local file on computer
+    my_local_file = cript.File(
+        name="my complex local file node fixture", source=str(local_file_path), type="calibration", extension=".csv", data_dictionary="my complex local files fixture data dictionary", notes="my complex local files fixture notes"
+    )
+
+    return my_local_file
+
+
 @pytest.fixture(scope="function")
 def complex_user_dict() -> dict:
     user_dict = {"node": ["User"]}