diff --git a/lms/djangoapps/instructor/features/data_download.py b/lms/djangoapps/instructor/features/data_download.py
index 9aefec5d47..93aedec5ec 100644
--- a/lms/djangoapps/instructor/features/data_download.py
+++ b/lms/djangoapps/instructor/features/data_download.py
@@ -74,7 +74,7 @@ def verify_report_is_generated(report_name_substring):
     world.wait_for_visible('#report-downloads-table')
     # Find table and assert a .csv file is present
     quoted_id = http.urlquote(world.course_key).replace('/', '_')
-    expected_file_regexp = quoted_id + '_' + report_name_substring + '\d{4}-\d{2}-\d{2}-\d{4}\.csv'
+    expected_file_regexp = quoted_id + '_' + report_name_substring + '_\d{4}-\d{2}-\d{2}-\d{4}\.csv'
     assert_regexp_matches(
         world.css_html('#report-downloads-table'), expected_file_regexp,
         msg="Expected report filename was not found."