diff --git a/api/tests/test_api_intercompany_matrix.py b/api/tests/test_api_intercompany_matrix.py
index 2b131f5..44050cd 100644
--- a/api/tests/test_api_intercompany_matrix.py
+++ b/api/tests/test_api_intercompany_matrix.py
@@ -70,7 +70,8 @@ async def _request(client: AsyncClient, version_id: uuid.UUID, suffix: str, sele
 async def _source(
     session: AsyncSession, world: World, *, credit: bool, amount: str, account: str | None = None
 ) -> uuid.UUID:
-    owner, counterparty = reversed(world.members) if credit else world.members
+    pair = world.members[:2]
+    owner, counterparty = reversed(pair) if credit else pair
     code = account or ("60.01" if credit else "62.01")
     document = await make_confirmed_osv(
         session,
@@ -163,6 +164,7 @@ async def test_company_filter_applies_to_matrix_and_export(
     assert [company["id"] for company in data["companies"]] == selected
     assert len(data["cells"]) == 2  # noqa: PLR2004 - одна направленная ячейка на каждую сторону пары
     assert set(data["total_debit"]) == set(data["total_credit"]) == set(selected)
+    assert data["total_debit"] == {selected[0]: "100.00", selected[1]: "0.00"}
     sheet = load_workbook(BytesIO(export.content))["Шахматка"]
     assert [sheet.cell(10, column).value for column in range(3, 6)] == [
         world.members[0].name,