diff --git a/rowers/tests/test_units.py b/rowers/tests/test_units.py
index c3230821..82298a0f 100644
--- a/rowers/tests/test_units.py
+++ b/rowers/tests/test_units.py
@@ -78,7 +78,7 @@ class ForceUnits(TestCase):
         average_N = int(df['averageforce'].mean())
         self.assertEqual(average_N,398)
 
-        df = dataprep.clean_df_stats(datadf,ignoreadvanced=False)
+        df = dataprep.clean_df_stats(df,ignoreadvanced=False)
         average_N = int(df['averageforce'].mean())
         self.assertEqual(average_N,399)