diff --git a/tests/test_reports_related_postings.py b/tests/test_reports_related_postings.py
index 1848c0f29729b144502dec6dbb0d5b2fc691315a..ba0066ddfca9a4144d80fd27261e1208605711ca 100644
--- a/tests/test_reports_related_postings.py
+++ b/tests/test_reports_related_postings.py
@@ -30,9 +30,10 @@ from conservancy_beancount.reports import core
 def accruals_and_payments(acct, src_acct, dst_acct, start_date, *amounts):
     dates = testutil.date_seq(start_date)
     for amt, currency in amounts:
+        post_meta = {'metanumber': amt, 'metacurrency': currency}
         yield testutil.Transaction(date=next(dates), postings=[
-            (acct, amt, currency),
-            (dst_acct if amt < 0 else src_acct, -amt, currency),
+            (acct, amt, currency, post_meta),
+            (dst_acct if amt < 0 else src_acct, -amt, currency, post_meta),
         ])
 
 @pytest.fixture
@@ -174,3 +175,33 @@ def test_meta_values_many_types():
     for index, value in enumerate(expected):
         related.add(testutil.Posting('Income:Donations', -index, key=value))
     assert related.meta_values('key') == expected
+
+def test_group_by_meta_zero():
+    assert len(core.RelatedPostings.group_by_meta([], 'metacurrency')) == 0
+
+def test_group_by_meta_key_error():
+    # Make sure the return value doesn't act like a defaultdict.
+    with pytest.raises(KeyError):
+        core.RelatedPostings.group_by_meta([], 'metakey')['metavalue']
+
+def test_group_by_meta_one(credit_card_cycle):
+    posting = next(post for post in data.Posting.from_entries(credit_card_cycle)
+                   if post.account.is_credit_card())
+    actual = core.RelatedPostings.group_by_meta([posting], 'metacurrency')
+    assert set(actual) == {'USD'}
+
+def test_group_by_meta_many(two_accruals_three_payments):
+    postings = [post for post in data.Posting.from_entries(two_accruals_three_payments)
+                if post.account == 'Assets:Receivable:Accounts']
+    actual = core.RelatedPostings.group_by_meta(postings, 'metacurrency')
+    assert set(actual) == {'USD', 'EUR'}
+    for key, group in actual.items():
+        assert 2 <= len(group) <= 3
+        assert group.balance().is_zero()
+
+def test_group_by_meta_many_single_posts(two_accruals_three_payments):
+    postings = [post for post in data.Posting.from_entries(two_accruals_three_payments)
+                if post.account == 'Assets:Receivable:Accounts']
+    actual = core.RelatedPostings.group_by_meta(postings, 'metanumber')
+    assert set(actual) == {post.units.number for post in postings}
+    assert len(actual) == len(postings)