diff --git a/tests/test_reconcile.py b/tests/test_reconcile.py
index 7703921ad83e70aabc8c161644521c3b1e11fd71..fc00ef5c76a39769241dd22716379f7bf66093dd 100644
--- a/tests/test_reconcile.py
+++ b/tests/test_reconcile.py
@@ -13,6 +13,7 @@ from conservancy_beancount.reconcile.statement_reconciler import (
     metadata_for_match,
     write_metadata_to_books,
     totals,
+    subset_match,
 )
 
 # These data structures represent individual transactions as taken from the
@@ -40,6 +41,13 @@ S3 = {
     'check_id': '',
     'line': 444,
 }
+S4 = {
+    'date': datetime.date(2022, 8, 11),
+    'amount': decimal.Decimal('-2260.00'),
+    'payee': 'Trust 0000000362 210',
+    'check_id': '',
+    'line': 555,
+}
 
 # Books transaction examples.
 B1 = {
@@ -114,81 +122,116 @@ B3_unmatched_check_id = {
     'line': 999,
     'bank_statement': "Financial/Bank-Statements/AMEX/2022-01-12_AMEX_statement.pdf"
 }
+B4A = {
+    'date': datetime.date(2022, 8, 11),
+    'amount': decimal.Decimal('-250.00'),
+    'payee': 'TRUST 0000000362 ACH Retirement Plan',
+    'check_id': '',
+    'line': 1000,
+}
+B4B = {
+    'date': datetime.date(2022, 8, 11),
+    'amount': decimal.Decimal('-250.00'),
+    'payee': 'TRUST 0000000362 ACH Retirement Plan',
+    'check_id': '',
+    'line': 1000,
+}
+B4C = {
+    'date': datetime.date(2022, 8, 11),
+    'amount': decimal.Decimal('-1760.00'),
+    'payee': 'TRUST 0000000362 ACH Retirement Plan',
+    'check_id': '',
+    'line': 1000,
+}
+
 
 
 def test_one_exact_match():
     statement = [S1]
     books = [B1]
-    assert match_statement_and_books(statement, books) == [
+    assert match_statement_and_books(statement, books) == (
         # Match, match, notes.
         #
         # The matches are a list so we can implement subset-sum matching where
         # multiple books transactions may match to a single statement
         # transaction.
-        ([S1], [B1], []),
-    ]
+        [([S1], [B1], [])],
+        [],
+        [],
+    )
 
 def test_multiple_exact_matches():
     statement = [S1, S2]
     books = [B1, B2]
-    assert match_statement_and_books(statement, books) == [
-        ([S1], [B1], []),
-        ([S2], [B2], []),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [([S1], [B1], []), ([S2], [B2], [])],
+        [],
+        [],
+    )
 
 def test_one_mismatch():
     statement = [S1]
     books = []
-    assert match_statement_and_books(statement, books) == [
-        ([S1], [], ['no match']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [],
+        [S1],
+        [],
+    )
 
 def test_multiple_mismatches():
     statement = [S1]
     books = [B2]
-    assert match_statement_and_books(statement, books) == [
-        ([S1], [], ['no match']),
-        ([], [B2], ['no match']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [],
+        [S1],
+        [B2],
+    )
 
 def test_next_day_matches():
     statement = [S3]
     books = [B3_next_day]
-    assert match_statement_and_books(statement, books) == [
-        ([S3], [B3_next_day], ['+/- 1 days']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [([S3], [B3_next_day], ['+/- 1 days'])],
+        [],
+        [],
+    )
 
 def test_next_week_matches():
     statement = [S3]
     books = [B3_next_week]
-    assert match_statement_and_books(statement, books) == [
-        ([S3], [B3_next_week], ['+/- 7 days']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [([S3], [B3_next_week], ['+/- 7 days'])],
+        [],
+        [],
+    )
 
 def test_incorrect_amount_does_not_match():
     statement = [S3]
     books = [B3_mismatch_amount]
-    assert match_statement_and_books(statement, books) == [
-        ([S3], [], ['no match']),
-        ([], [B3_mismatch_amount], ['no match']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [],
+        [S3],
+        [B3_mismatch_amount],
+    )
 
 def test_payee_mismatch_ok_when_only_one_that_amount_and_date():
     statement = [S3]
     books = [B3_payee_mismatch_1]
-    assert match_statement_and_books(statement, books) == [
-        ([S3], [B3_payee_mismatch_1], ['payee mismatch', 'only one decent match']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [([S3], [B3_payee_mismatch_1], ['payee mismatch', 'only one decent match'])],
+        [],
+        [],
+    )
 
 def test_payee_mismatch_not_ok_when_multiple_that_amount_and_date():
     statement = [S3]
     books = [B3_payee_mismatch_1, B3_payee_mismatch_2]
     match = match_statement_and_books(statement, books)
-    assert match == [
-        ([S3], [], ['no match']),
-        ([], [B3_payee_mismatch_1], ['no match']),
-        ([], [B3_payee_mismatch_2], ['no match']),
-    ]
+    assert match == (
+        [],
+        [S3],
+        [B3_payee_mismatch_1, B3_payee_mismatch_2],
+    )
 
 def test_remove_payee_junk():
     assert remove_payee_junk('WIDGETSRUS INC PAYMENT 1') == 'WIDGETSRUS'
@@ -251,7 +294,17 @@ def test_payee_not_considered_if_check_id_present():
     # These records match aside from check-id.
     statement = [S3]
     books = [B3_unmatched_check_id]
-    assert match_statement_and_books(statement, books) == [
-        ([S3], [], ['no match']),
-        ([], [B3_unmatched_check_id], ['no match']),
-    ]
+    assert match_statement_and_books(statement, books) == (
+        [],
+        [S3],
+        [B3_unmatched_check_id],
+    )
+
+def test_subset_sum_match():
+    statement = [S4]
+    books = [B4A, B4B, B4C]
+    assert subset_match(statement, books) == (
+        [([S4], [B4A, B4B, B4C], [])],
+        [],  # No remaining statement trans.
+        [],  # No remaining books trans.
+    )