diff --git a/backend/tools_test.go b/backend/tools_test.go
index 8d50f31..d30f10e 100644
--- a/backend/tools_test.go
+++ b/backend/tools_test.go
@@ -256,7 +256,7 @@ func TestExecuteTool_MoveCard_BetweenColumns_OpensHistory(t *testing.T) {
 
 	histRes := executeTool(db, "card_history", mustJSON(t, map[string]string{"id": card.ID}))
 	mustOK(t, histRes)
-	hist := histRes.Result.([]HistoryEntry)
+	hist := histRes.Result.(*CardHistoryResponse).ColumnHistory
 	if len(hist) != 2 {
 		t.Fatalf("expected 2 history entries, got %d", len(hist))
 	}
@@ -286,7 +286,7 @@ func TestExecuteTool_CardHistory_Single(t *testing.T) {
 
 	res := executeTool(db, "card_history", mustJSON(t, map[string]string{"id": card.ID}))
 	mustOK(t, res)
-	hist := res.Result.([]HistoryEntry)
+	hist := res.Result.(*CardHistoryResponse).ColumnHistory
 	if len(hist) != 1 || hist[0].ExitedAt != nil {
 		t.Fatalf("expected 1 open history entry, got %+v", hist)
 	}