diff --git a/narwhals/dependencies.py b/narwhals/dependencies.py
index aabfa7a5e8..6b3fd1a57a 100644
--- a/narwhals/dependencies.py
+++ b/narwhals/dependencies.py
@@ -110,7 +110,6 @@ def is_dask_dataframe(df: Any) -> TypeGuard[dd.DataFrame]:
     return bool((dd := get_dask_dataframe()) is not None and isinstance(df, dd.DataFrame))
 
 
-
 def is_ibis_table(df: Any) -> TypeGuard[duckdb.DuckDBPyRelation]:
     """Check whether `df` is a Ibis Table without importing Ibis."""
     return bool((ibis := get_ibis()) is not None and isinstance(df, ibis.Table))