Can't access inherited method in test environment Rails - ruby-on-rails

Question

I am trying to write a test to check a user flow in my application. For that, I need to test a method called is_apple that is in AppleController, AppleController is inherited from FruitsController. I have a method in FruitsController called taste which can be used inside AppleController's is_apple method. The output is the same as expected in the Development and Production environment. But In the Test environment, The method from the FruitsController is undefined in AppleController. I am new to rails testing, I don't know what is potentially causing this issue in my application's test environment.
test_helper.rb
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'
class ActiveSupport::TestCase
def setup
puts "starting a test"
post "v1/is_apple", params: {colour: 'red', taste: 'sweet'}
end
end
apple_controller.rb
module V1
class AppleController < FruitsController
def is_apple
return true if taste and params[:colour].eql?('red')
end
end
end
fruits_controller.rb
module V1
class FruitsController < ActionController::API
def taste
# assume
return true
end
end
end
I am using minitest '5.10.3' and rails 6. When I run rails test, am getting undefined_method 'taste' in AppleController. Is there any mistakes in my code? , If yes, How can I achieve the behaviour I wanted. Thanks in advance!