diff --git a/tests/test_reports_accrual.py b/tests/test_reports_accrual.py
index 0a2d6dd38259de773225d2ec4d83e875f65f6c02..e880b0d33ffeb4de3b9b5f312c1db7cedf1c0036 100644
--- a/tests/test_reports_accrual.py
+++ b/tests/test_reports_accrual.py
@@ -250,6 +250,20 @@ def test_consistency_check_when_inconsistent(meta_key, account):
         assert actual.entry is txn
         assert actual.source.get('lineno') == exp_lineno
 
+def test_consistency_check_cost():
+    account = ACCOUNTS[0]
+    invoice = 'test-cost-invoice'
+    txn = testutil.Transaction(postings=[
+        (account, 100, 'EUR', ('1.1251', 'USD'), {'invoice': invoice, 'lineno': 1}),
+        (account, -100, 'EUR', ('1.125', 'USD'), {'invoice': invoice, 'lineno': 2}),
+    ])
+    related = core.RelatedPostings(data.Posting.from_txn(txn))
+    errors = list(accrual.consistency_check({invoice: related}))
+    for post, err in itertools.zip_longest(txn.postings, errors):
+        assert err.message == f'inconsistent cost for invoice {invoice}: {post.cost}'
+        assert err.entry is txn
+        assert err.source.get('lineno') == post.meta['lineno']
+
 def check_output(output, expect_patterns):
     output.seek(0)
     testutil.check_lines_match(iter(output), expect_patterns)