diff --git a/tests/test_reports_related_postings.py b/tests/test_reports_related_postings.py
index 49f0534c8f5516e14004830e0086fe8373d772cd..bb4cdad4f0a4e07ec473f6408b3419de4b74f52c 100644
--- a/tests/test_reports_related_postings.py
+++ b/tests/test_reports_related_postings.py
@@ -398,3 +398,21 @@ def test_group_by_first_meta_link(link_swap_posts):
         actual = actual_all.get(key, '')
         assert len(actual) == 2
         assert all(post.account == expect_account for post in actual)
+
+def test_group_by_account():
+    entries = [
+        testutil.Transaction(postings=[
+            ('Income:Donations', -10),
+            ('Assets:Cash', 10),
+        ]),
+        testutil.Transaction(postings=[
+            ('Income:Donations', -20),
+            ('Assets:Cash', 20),
+        ]),
+    ]
+    postings = data.Posting.from_entries(entries)
+    actual = dict(core.RelatedPostings.group_by_account(postings))
+    assert len(actual) == 2
+    for key, related in actual.items():
+        assert len(related) == 2
+        assert all(post.account == key for post in related)