diff --git a/tests/api/test_study.py b/tests/api/test_study.py
index 70e00b556..b1344f4f4 100644
--- a/tests/api/test_study.py
+++ b/tests/api/test_study.py
@@ -76,7 +76,7 @@ def test_csv(self, client, studies):
         assert response.get('Content-Disposition') == 'attachment; filename="Study.csv"'
         content = b''.join(response.streaming_content).decode('utf-8')
 
-        expected_header = [
+        expected_header = ",".join([
             "\"accession\"",
             "\"analyses\"",
             "\"bioproject\"",
@@ -93,7 +93,7 @@ def test_csv(self, client, studies):
             "\"study_abstract\"",
             "\"study_name\"",
             "\"url\""
-        ]
+        ])
         first_row = [
             "MGYS00000001",
             "",