Getting :ok back from Recaptcha.verify("invalid_response")

[TheFirstAvenger]

I have my test environment set up as described in the readme:

config :recaptcha,
  http_client: Recaptcha.Http.MockClient,
  secret: "6LeIxAcTAAAAAGG-vFI1TnRWxMZNFuojJ4WifJWe"

but I am getting an :ok tuple back from Recaptcha.verify("invalid_response") instead of an :error tuple:

$ MIX_ENV=test iex -S mix
Erlang/OTP 22 [erts-10.7.2.3] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [hipe]

Interactive Elixir (1.10.4) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> Recaptcha.verify("invalid_response")
{:ok,
 %Recaptcha.Response{
   challenge_ts: "2020-10-07T19:01:22Z",
   hostname: "testkey.google.com"
 }}

[jhonathas]

Same problem here. Any solution?