Fix coin_id test

CHANGELOG.md

@@ -20,6 +20,7 @@
 - [#6106](https://github.com/blockscout/blockscout/pull/6106) - Fix 500 response on `/coin-balance` for empty address
 - [#6118](https://github.com/blockscout/blockscout/pull/6118) - Fix unfetched token balances
 - [#6163](https://github.com/blockscout/blockscout/pull/6163) - Fix rate limit logs
+- [#6223](https://github.com/blockscout/blockscout/pull/6223) - Fix coin_id test
 
 ### Chore
 

apps/explorer/test/explorer/exchange_rates/source/coin_gecko_test.exs

@@ -115,7 +115,9 @@ defmodule Explorer.ExchangeRates.Source.CoinGeckoTest do
       {:ok, bypass: bypass}
     end
 
-    test "fetches poa coin id by default", %{bypass: bypass} do
+    test "fetches poa coin id", %{bypass: bypass} do
+      Application.put_env(:explorer, :coin, "POA")
+
       Bypass.expect(bypass, "GET", "/coins/list", fn conn ->
         Conn.resp(conn, 200, @coins_list)
       end)