diff --git a/workflow/tests/test_pool_and_psuedoreplicate.py b/workflow/tests/test_pool_and_psuedoreplicate.py
index 34fa27b50e4c4b4d577439fc95e0e91002ac72e3..7f8945b489200ca4202e76b80598127446c4643c 100644
--- a/workflow/tests/test_pool_and_psuedoreplicate.py
+++ b/workflow/tests/test_pool_and_psuedoreplicate.py
@@ -36,9 +36,9 @@ def design_experiment_3(design_experiment):
     # Drop Replicate A_2
     design_df = design_experiment.drop(design_experiment.index[1])
     # Update to be paired as first
-    design_experiment.loc[0, 'control_tag_align'] = 'B_1.bedpe.gz'
-    design_experiment.loc[0, 'tag_align'] = 'A_1.bedpe.gz'
-    return design_experiment
+    design_df.loc[0, 'control_tag_align'] = 'B_1.bedpe.gz'
+    design_df.loc[0, 'tag_align'] = 'A_1.bedpe.gz'
+    return design_df
 
 
 @pytest.mark.unit