diff --git a/policyengine_core/simulations/simulation.py b/policyengine_core/simulations/simulation.py
index 23fbe59e..9965735c 100644
--- a/policyengine_core/simulations/simulation.py
+++ b/policyengine_core/simulations/simulation.py
@@ -159,7 +159,9 @@ def __init__(
                     else:
                         version = None
                     dataset = download_huggingface_dataset(
-                        owner + "/" + repo, filename, version
+                        repo=f"{owner}/{repo}",
+                        repo_filename=filename,
+                        version=version,
                     )
                 datasets_by_name = {
                     dataset.name: dataset for dataset in self.datasets
diff --git a/tests/core/tools/test_hugging_face.py b/tests/core/tools/test_hugging_face.py
index 90f8cae9..16c92f29 100644
--- a/tests/core/tools/test_hugging_face.py
+++ b/tests/core/tools/test_hugging_face.py
@@ -9,7 +9,7 @@
 )
 
 
-class TestHfDownload:
+class TestHuggingFaceDownload:
     def test_download_public_repo(self):
         """Test downloading from a public repo"""
         test_repo = "test_repo"
@@ -91,7 +91,6 @@ def test_download_private_repo_no_token(self):
                         download_huggingface_dataset(test_repo, test_filename, test_version)
                         mock_download.assert_not_called()
 
-
 class TestGetOrPromptHfToken:
     def test_get_token_from_environment(self):
         """Test retrieving token when it exists in environment variables"""