diff --git a/tests/test_reports_accrual.py b/tests/test_reports_accrual.py
index 2ca92b44de0b591fd9e7af08a1ba2bbc080f54d8..f99706c6276d5216e1ab5b36ff3462a80249ef89 100644
--- a/tests/test_reports_accrual.py
+++ b/tests/test_reports_accrual.py
@@ -577,15 +577,19 @@ def test_aging_report_does_not_include_too_recent_postings(accrual_postings):
                              project='Development Grant'),
     ], [])
 
-def run_main(arglist, config=None):
+def run_main(arglist, config=None, out_type=io.StringIO):
     if config is None:
         config = testutil.TestConfig(
             books_path=testutil.test_path('books/accruals.beancount'),
             rt_client=RTClient(),
         )
-    output = io.StringIO()
+    if out_type is io.BytesIO:
+        arglist.insert(0, '--output-file=-')
+    output = out_type()
     errors = io.StringIO()
     retcode = accrual.main(arglist, output, errors, config)
+    output.seek(0)
+    errors.seek(0)
     return retcode, output, errors
 
 def check_main_fails(arglist, config, error_flags):
@@ -593,7 +597,6 @@ def check_main_fails(arglist, config, error_flags):
     assert retcode > 16
     assert (retcode - 16) & error_flags
     assert not output.getvalue()
-    errors.seek(0)
     return errors
 
 @pytest.mark.parametrize('arglist', [
@@ -624,7 +627,7 @@ def test_output_payments_when_only_match(arglist, expect_invoice):
 @pytest.mark.parametrize('arglist,expect_amount', [
     (['310'], 420),
     (['310/3120'], 220),
-    (['entity=Vendor'], 420),
+    (['-t', 'out', 'entity=Vendor'], 420),
 ])
 def test_main_outgoing_report(arglist, expect_amount):
     retcode, output, errors = run_main(arglist)
@@ -643,7 +646,6 @@ def test_main_outgoing_report(arglist, expect_amount):
 @pytest.mark.parametrize('arglist', [
     ['-t', 'balance'],
     ['515/5150'],
-    ['entity=MatchingProgram'],
 ])
 def test_main_balance_report(arglist):
     retcode, output, errors = run_main(arglist)
@@ -666,23 +668,19 @@ def test_main_balance_report_because_no_rt_id():
 
 @pytest.mark.parametrize('arglist', [
     [],
-    ['-t', 'aging', 'entity=Lawyer'],
+    ['entity=Lawyer'],
 ])
-def test_main_aging_report(tmp_path, arglist):
+def test_main_aging_report(arglist):
     if arglist:
         recv_rows = [row for row in AGING_AR if 'Lawyer' in row.entity]
         pay_rows = [row for row in AGING_AP if 'Lawyer' in row.entity]
     else:
         recv_rows = AGING_AR
         pay_rows = AGING_AP
-    output_path = tmp_path / 'AgingReport.ods'
-    arglist.insert(0, f'--output-file={output_path}')
-    retcode, output, errors = run_main(arglist)
+    retcode, output, errors = run_main(arglist, out_type=io.BytesIO)
     assert not errors.getvalue()
     assert retcode == 0
-    assert not output.getvalue()
-    with output_path.open('rb') as ods_file:
-        check_aging_ods(ods_file, None, recv_rows, pay_rows)
+    check_aging_ods(output, None, recv_rows, pay_rows)
 
 def test_main_no_books():
     errors = check_main_fails([], testutil.TestConfig(), 1 | 8)
@@ -693,7 +691,7 @@ def test_main_no_books():
 @pytest.mark.parametrize('arglist', [
     ['499'],
     ['505/99999'],
-    ['entity=NonExistent'],
+    ['-t', 'balance', 'entity=NonExistent'],
 ])
 def test_main_no_matches(arglist, caplog):
     check_main_fails(arglist, None, 8)