diff --git a/tests/test_reports_related_postings.py b/tests/test_reports_related_postings.py
index 2dda881faac48f290f5ab70755b7564869a6ed04..a9186196e17892a2df0d0750d5de0bb7227e40ac 100644
--- a/tests/test_reports_related_postings.py
+++ b/tests/test_reports_related_postings.py
@@ -27,13 +27,8 @@ from . import testutil
 from conservancy_beancount import data
 from conservancy_beancount.reports import core
 
-def date_seq(date=testutil.FY_MID_DATE, step=1):
-    while True:
-        yield date
-        date = date + datetime.timedelta(days=step)
-
 def accruals_and_payments(acct, src_acct, dst_acct, start_date, *amounts):
-    dates = date_seq(start_date)
+    dates = testutil.date_seq(start_date)
     for amt, currency in amounts:
         yield testutil.Transaction(date=next(dates), postings=[
             (acct, amt, currency),