botbuilder-dotnet/tests/Microsoft.Bot.Builder.TestBot.Tests/appsettings.json

{
  "cognitiveModels": {
    "flightBooking": {
      "luisAppId": "Set the value here or in launchSettings.json for local dev",
      "luisEndpointKey": "Set the value here or in launchSettings.json for local dev",
      "luisEndpoint": "Set the value here or in launchSettings.json for local dev"
    }
  }
}