diff --git a/tests/test_reports_query.py b/tests/test_reports_query.py
index fa5270b27bfa19e7a39a0d6b6c113a8b2c0f9ea2..f3ba5947de28d183f993e3317cc397da6091fdfd 100644
--- a/tests/test_reports_query.py
+++ b/tests/test_reports_query.py
@@ -86,10 +86,10 @@ def test_rt_ticket_bad_metadata(ticket_query, meta_name):
         ticket_query(const_operands('id', meta_name))
 
 @pytest.mark.parametrize('field_name,meta_name,expected', [
-    ('id', 'rt-id', 1),
-    ('Queue', 'approval', 'general'),
-    ('Requestors', 'invoice', ['mx1@example.org', 'requestor2@example.org']),
-    ('Due', 'tax-reporting', datetime.datetime(2017, 1, 14, 12, 1, 0, tzinfo=UTC)),
+    ('id', 'rt-id', {1}),
+    ('Queue', 'approval', {'general'}),
+    ('Requestors', 'invoice', {'mx1@example.org', 'requestor2@example.org'}),
+    ('Due', 'tax-reporting', {datetime.datetime(2017, 1, 14, 12, 1, 0, tzinfo=UTC)}),
 ])
 def test_rt_ticket_from_txn(ticket_query, field_name, meta_name, expected):
     func = ticket_query(const_operands(field_name, meta_name))
@@ -97,15 +97,13 @@ def test_rt_ticket_from_txn(ticket_query, field_name, meta_name, expected):
         ('Assets:Cash', 80),
     ])
     context = RowContext(txn, txn.postings[0])
-    if not isinstance(expected, list):
-        expected = [expected]
     assert func(context) == expected
 
 @pytest.mark.parametrize('field_name,meta_name,expected', [
-    ('id', 'rt-id', 2),
-    ('Queue', 'approval', 'general'),
-    ('Requestors', 'invoice', ['mx2@example.org', 'requestor2@example.org']),
-    ('Due', 'tax-reporting', datetime.datetime(2017, 1, 14, 12, 2, 0, tzinfo=UTC)),
+    ('id', 'rt-id', {2}),
+    ('Queue', 'approval', {'general'}),
+    ('Requestors', 'invoice', {'mx2@example.org', 'requestor2@example.org'}),
+    ('Due', 'tax-reporting', {datetime.datetime(2017, 1, 14, 12, 2, 0, tzinfo=UTC)}),
 ])
 def test_rt_ticket_from_post(ticket_query, field_name, meta_name, expected):
     func = ticket_query(const_operands(field_name, meta_name))
@@ -113,19 +111,16 @@ def test_rt_ticket_from_post(ticket_query, field_name, meta_name, expected):
         ('Assets:Cash', 110, {meta_name: 'rt:2/8'}),
     ])
     context = RowContext(txn, txn.postings[0])
-    if not isinstance(expected, list):
-        expected = [expected]
     assert func(context) == expected
 
 @pytest.mark.parametrize('field_name,meta_name,expected,on_txn', [
-    ('id', 'approval', [1, 2], True),
-    ('Queue', 'check', ['general', 'general'], False),
-    ('Requestors', 'invoice', [
+    ('id', 'approval', {1, 2}, True),
+    ('Queue', 'check', {'general'}, False),
+    ('Requestors', 'invoice', {
         'mx1@example.org',
         'mx2@example.org',
         'requestor2@example.org',
-        'requestor2@example.org',
-    ], False),
+    }, False),
 ])
 def test_rt_ticket_multi_results(ticket_query, field_name, meta_name, expected, on_txn):
     func = ticket_query(const_operands(field_name, meta_name))
@@ -136,7 +131,7 @@ def test_rt_ticket_multi_results(ticket_query, field_name, meta_name, expected,
     meta = txn.meta if on_txn else post.meta
     meta[meta_name] = 'rt:1/2 Docs/12.pdf rt:2/8'
     context = RowContext(txn, post)
-    assert sorted(func(context)) == expected
+    assert func(context) == expected
 
 @pytest.mark.parametrize('meta_value,on_txn', testutil.combine_values(
     ['', 'Docs/34.pdf', 'Docs/100.pdf Docs/120.pdf'],
@@ -151,7 +146,7 @@ def test_rt_ticket_no_results(ticket_query, meta_value, on_txn):
     meta = txn.meta if on_txn else post.meta
     meta['check'] = meta_value
     context = RowContext(txn, post)
-    assert func(context) == []
+    assert func(context) == set()
 
 def test_rt_ticket_caches_tickets():
     rt_client = testutil.RTClient()
@@ -162,9 +157,9 @@ def test_rt_ticket_caches_tickets():
         ('Assets:Cash', 160, {'rt-id': 'rt:3'}),
     ])
     context = RowContext(txn, txn.postings[0])
-    assert func(context) == [3]
+    assert func(context) == {3}
     del rt_client.TICKET_DATA['3']
-    assert func(context) == [3]
+    assert func(context) == {3}
 
 def test_rt_ticket_caches_tickets_not_found():
     rt_client = testutil.RTClient()
@@ -176,9 +171,9 @@ def test_rt_ticket_caches_tickets_not_found():
         ('Assets:Cash', 160, {'rt-id': 'rt:3'}),
     ])
     context = RowContext(txn, txn.postings[0])
-    assert func(context) == []
+    assert func(context) == set()
     rt_client.TICKET_DATA['3'] = rt3
-    assert func(context) == []
+    assert func(context) == set()
 
 def test_books_loader_empty():
     result = qmod.BooksLoader(None)()