diff --git a/containers/popv/context/main.py b/containers/popv/context/main.py
index 746a648..9b2dcf7 100644
--- a/containers/popv/context/main.py
+++ b/containers/popv/context/main.py
@@ -144,7 +144,7 @@ def _find_in_dir(
 
     def normalize_var_names(
         self, data: scanpy.AnnData, options: PopvOptions
-    ) -> t.Tuple[scanpy.AnnData, pandas.Index]:
+    ) -> scanpy.AnnData:
         lookup = self.load_ensemble_lookup(options)
         names = data.var_names