diff --git a/backend/test/fixtures/pbmc3k-genesets.csv b/backend/test/fixtures/pbmc3k-genesets.csv
index 83340d4c..d15d6c78 100644
--- a/backend/test/fixtures/pbmc3k-genesets.csv
+++ b/backend/test/fixtures/pbmc3k-genesets.csv
@@ -1,13 +1,13 @@
 # Test fixture
 gene_set_name,gene_set_description,gene_symbol,gene_description
-first gene set name,,F5, a gene_description
+first gene set name,a description,F5, a gene_description
 first gene set name,a description,NO_SUCH_GENE, non-existent gene
 first gene set name,a description,F5, duplicate gene
-first gene set name, a description,SUMO3,
-first gene set name,,SRM,
-second_gene_set,,RER1
-second_gene_set,,SIK1
-third gene set,,NO_SUCH_GENE
+first gene set name,a description,SUMO3,
+first gene set name,a description,SRM,
+second_gene_set,,RER1,
+second_gene_set,,SIK1,
+third gene set,,NO_SUCH_GENE,
 fourth_gene_set,fourth description,,gene intentionally missing
 fifth_dataset,,,
 summary test,,ACD,
diff --git a/backend/test/test_czi_hosted/unit/common/test_api.py b/backend/test/test_czi_hosted/unit/common/test_api.py
index ee729750..6b5f80df 100644
--- a/backend/test/test_czi_hosted/unit/common/test_api.py
+++ b/backend/test/test_czi_hosted/unit/common/test_api.py
@@ -569,17 +569,24 @@ class EndPointsCxg(unittest.TestCase, EndPoints):
             result.text,
             """gene_set_name,gene_set_description,gene_symbol,gene_description\r
 first gene set name,a description,F5, a gene_description\r
+first gene set name,a description,NO_SUCH_GENE, non-existent gene\r
+first gene set name,a description,F5, duplicate gene
 first gene set name,a description,SUMO3,\r
 first gene set name,a description,SRM,\r
 second gene set,,RER1,\r
 second gene set,,SIK1,\r
-third gene set,,,\r
-fourth_gene_set,fourth description,,\r
+third gene set,,NO_SUCH_GENE,\r
+fourth_gene_set,fourth description,,gene intentionally missing\r
 fifth_dataset,,,\r
 summary test,,ACD,\r
 summary test,,AATF,\r
 summary test,,F5,\r
 summary test,,PIGU,\r
+geneset_to_delete,,,\r
+geneset_to_edit,,,\r
+fill_this_geneset,,RER1,\r
+empty_this_geneset,,SIK1,\r
+brush_this_gene,,SIK1,\r
 """,
         )