diff --git a/internal/store/listitems_test.go b/internal/store/listitems_test.go
new file mode 100644
index 0000000..eb2a464
--- /dev/null
+++ b/internal/store/listitems_test.go
@@ -0,0 +1,149 @@
+package store
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+)
+
+var listNow = time.Date(2026, 8, 4, 12, 0, 0, 0, time.UTC)
+
+func TestAddListItemDedupesTheOpenList(t *testing.T) {
+	ctx := context.Background()
+	s := newTestStore(t)
+
+	first, err := s.AddListItem(ctx, ListItem{Item: "молоко", Source: "tap:voice", CreatedTs: listNow})
+	if err != nil {
+		t.Fatalf("add: %v", err)
+	}
+	if !first.Created {
+		t.Fatal("the first молоко did not create a row")
+	}
+	again, err := s.AddListItem(ctx, ListItem{Item: " Молоко ", Source: "tap:voice", CreatedTs: listNow})
+	if err != nil {
+		t.Fatalf("add again: %v", err)
+	}
+	if again.Created {
+		t.Error("молоко was added twice")
+	}
+	if again.ID != first.ID {
+		t.Errorf("second add points at %d; want the existing %d", again.ID, first.ID)
+	}
+	if _, err := s.AddListItem(ctx, ListItem{Item: "  "}); !errors.Is(err, ErrListItemEmpty) {
+		t.Errorf("empty item: %v; want ErrListItemEmpty", err)
+	}
+}
+
+// A crossed-off item does not block the next one: buying milk again next week
+// is a new line, the way saying an errand again is a new task.
+func TestCrossedOffItemComesBack(t *testing.T) {
+	ctx := context.Background()
+	s := newTestStore(t)
+
+	first, err := s.AddListItem(ctx, ListItem{Item: "молоко", CreatedTs: listNow})
+	if err != nil {
+		t.Fatalf("add: %v", err)
+	}
+	if err := s.SetListItemStatus(ctx, first.ID, ListItemDone, listNow); err != nil {
+		t.Fatalf("cross off: %v", err)
+	}
+	next, err := s.AddListItem(ctx, ListItem{Item: "молоко", CreatedTs: listNow.Add(time.Hour)})
+	if err != nil {
+		t.Fatalf("add after: %v", err)
+	}
+	if !next.Created || next.ID == first.ID {
+		t.Errorf("second молоко reused row %d; want a new one", next.ID)
+	}
+	open, err := s.ListItems(ctx, "", "")
+	if err != nil {
+		t.Fatalf("list: %v", err)
+	}
+	if len(open) != 1 || open[0].ID != next.ID {
+		t.Errorf("open list %+v; want only the new row", open)
+	}
+}
+
+// Lists are separate stores under one table: the same word on two lists is two
+// items, and reading one never reads the other.
+func TestListsDoNotSeeEachOther(t *testing.T) {
+	ctx := context.Background()
+	s := newTestStore(t)
+
+	if _, err := s.AddListItem(ctx, ListItem{List: "покупки", Item: "вода", CreatedTs: listNow}); err != nil {
+		t.Fatalf("add: %v", err)
+	}
+	if _, err := s.AddListItem(ctx, ListItem{List: "Аптека", Item: "вода", CreatedTs: listNow}); err != nil {
+		t.Fatalf("add: %v", err)
+	}
+	for _, c := range []struct{ list, want string }{
+		{"покупки", "покупки"},
+		{"аптека", "аптека"},
+		{"", "покупки"},
+	} {
+		got, err := s.ListItems(ctx, c.list, "")
+		if err != nil {
+			t.Fatalf("list %q: %v", c.list, err)
+		}
+		if len(got) != 1 {
+			t.Fatalf("list %q has %d items; want 1", c.list, len(got))
+		}
+		if got[0].List != c.want {
+			t.Errorf("list %q returned tag %q; want %q", c.list, got[0].List, c.want)
+		}
+	}
+}
+
+func TestClearListCrossesOffEverythingOpen(t *testing.T) {
+	ctx := context.Background()
+	s := newTestStore(t)
+
+	for _, item := range []string{"молоко", "хлеб", "яйца"} {
+		if _, err := s.AddListItem(ctx, ListItem{Item: item, CreatedTs: listNow}); err != nil {
+			t.Fatalf("add %s: %v", item, err)
+		}
+	}
+	if _, err := s.AddListItem(ctx, ListItem{List: "аптека", Item: "бинт", CreatedTs: listNow}); err != nil {
+		t.Fatalf("add: %v", err)
+	}
+	n, err := s.ClearList(ctx, "покупки", listNow)
+	if err != nil {
+		t.Fatalf("clear: %v", err)
+	}
+	if n != 3 {
+		t.Errorf("cleared %d; want 3", n)
+	}
+	left, err := s.ListItems(ctx, "покупки", "")
+	if err != nil {
+		t.Fatalf("list: %v", err)
+	}
+	if len(left) != 0 {
+		t.Errorf("%d items still open; want none", len(left))
+	}
+	done, err := s.ListItems(ctx, "покупки", ListItemDone)
+	if err != nil {
+		t.Fatalf("list done: %v", err)
+	}
+	if len(done) != 3 || done[0].ResolvedTs == nil {
+		t.Errorf("done list %+v; want 3 rows carrying a resolved time", done)
+	}
+	other, err := s.ListItems(ctx, "аптека", "")
+	if err != nil {
+		t.Fatalf("list: %v", err)
+	}
+	if len(other) != 1 {
+		t.Error("clearing покупки touched аптека")
+	}
+}
+
+func TestSetListItemStatusRejectsWhatIsNotAStatus(t *testing.T) {
+	ctx := context.Background()
+	s := newTestStore(t)
+
+	if err := s.SetListItemStatus(ctx, 1, "куплено", listNow); !errors.Is(err, ErrListItemStatus) {
+		t.Errorf("bad status: %v; want ErrListItemStatus", err)
+	}
+	if err := s.SetListItemStatus(ctx, 999, ListItemDone, listNow); !errors.Is(err, ErrListItemNotFound) {
+		t.Errorf("missing row: %v; want ErrListItemNotFound", err)
+	}
+}