factorybotが動作しません

前提・実現したいこと

現在rspecを使用して、テストコードの勉強中です。
そこでfactory_botを使用していますが、buildのところでエラーが出てしまいます。
KeyError:　Factory not registered:
こちらがエラー文です。

ご教授お願いいたします。

発生している問題・エラーメッセージ

Comment
  #create
    ニックネームが空では登録できない (FAILED - 1)

Failures:

  1) Comment#create ニックネームが空では登録できない
     Failure/Error: comment = build(:comment,nickname: "")

     KeyError:
       Factory not registered: "comment"
     # ./spec/models/comment_spec.rb:7:in `block (3 levels) in <top (required)>'
     # ------------------
     # --- Caused by: ---
     # KeyError:
     #   key not found: "comment"
     #   ./spec/models/comment_spec.rb:7:in `block (3 levels) in <top (required)>'

Finished in 0.04478 seconds (files took 1.45 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/models/comment_spec.rb:6 # Comment#create ニックネームが空では登録できない

該当のソースコード

spec/modles/comment_spec.rb

require 'rails_helper'

describe Comment do
  describe '#create' do

    it "ニックネームが空では登録できない" do
      comment = build(:comment,nickname: "")
      comment.valid?
      expect(comment.errors[:nickname]).to include("を入力してください")
    end

  end
end

spec/factories/comments.rb

FactoryBot.define do

  factory :comment do
    nickname                  {"田中"}
    text                      {"テキスト"}
  end

end

spec_helper.rb

# This file was generated by the `rails generate rspec:install` command. Conventionally, all
# specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
# The generated `.rspec` file contains `--require spec_helper` which will cause
# this file to always be loaded, without a need to explicitly require it in any
# files.
#
# Given that it is always loaded, you are encouraged to keep this file as
# light-weight as possible. Requiring heavyweight dependencies from this file
# will add to the boot time of your test suite on EVERY test run, even for an
# individual file that may not need all of that loaded. Instead, consider making
# a separate helper file that requires the additional dependencies and performs
# the additional setup, and require it from the spec files that actually need
# it.
#
# See http://rubydoc.info/gems/rspec-core/RSpec/Core/Configuration
RSpec.configure do |config|
  # rspec-expectations config goes here. You can use an alternate
  # assertion/expectation library such as wrong or the stdlib/minitest
  # assertions if you prefer.
  config.expect_with :rspec do |expectations|
    # This option will default to `true` in RSpec 4. It makes the `description`
    # and `failure_message` of custom matchers include text for helper methods
    # defined using `chain`, e.g.:
    #     be_bigger_than(2).and_smaller_than(4).description
    #     # => "be bigger than 2 and smaller than 4"
    # ...rather than:
    #     # => "be bigger than 2"
    expectations.include_chain_clauses_in_custom_matcher_descriptions = true
  end

  # rspec-mocks config goes here. You can use an alternate test double
  # library (such as bogus or mocha) by changing the `mock_with` option here.
  config.mock_with :rspec do |mocks|
    # Prevents you from mocking or stubbing a method that does not exist on
    # a real object. This is generally recommended, and will default to
    # `true` in RSpec 4.
    mocks.verify_partial_doubles = true
  end

  # This option will default to `:apply_to_host_groups` in RSpec 4 (and will
  # have no way to turn it off -- the option exists only for backwards
  # compatibility in RSpec 3). It causes shared context metadata to be
  # inherited by the metadata hash of host groups and examples, rather than
  # triggering implicit auto-inclusion in groups with matching metadata.
  config.shared_context_metadata_behavior = :apply_to_host_groups

# The settings below are suggested to provide a good initial experience
# with RSpec, but feel free to customize to your heart's content.
=begin
  # This allows you to limit a spec run to individual examples or groups
  # you care about by tagging them with `:focus` metadata. When nothing
  # is tagged with `:focus`, all examples get run. RSpec also provides
  # aliases for `it`, `describe`, and `context` that include `:focus`
  # metadata: `fit`, `fdescribe` and `fcontext`, respectively.
  config.filter_run_when_matching :focus

  # Allows RSpec to persist some state between runs in order to support
  # the `--only-failures` and `--next-failure` CLI options. We recommend
  # you configure your source control system to ignore this file.
  config.example_status_persistence_file_path = "spec/examples.txt"

  # Limits the available syntax to the non-monkey patched syntax that is
  # recommended. For more details, see:
  #   - http://rspec.info/blog/2012/06/rspecs-new-expectation-syntax/
  #   - http://www.teaisaweso.me/blog/2013/05/27/rspecs-new-message-expectation-syntax/
  #   - http://rspec.info/blog/2014/05/notable-changes-in-rspec-3/#zero-monkey-patching-mode
  config.disable_monkey_patching!

  # Many RSpec users commonly either run the entire suite or an individual
  # file, and it's useful to allow more verbose output when running an
  # individual spec file.
  if config.files_to_run.one?
    # Use the documentation formatter for detailed output,
    # unless a formatter has already been configured
    # (e.g. via a command-line flag).
    config.default_formatter = "doc"
  end

  # Print the 10 slowest examples and example groups at the
  # end of the spec run, to help surface which specs are running
  # particularly slow.
  config.profile_examples = 10

  # Run specs in random order to surface order dependencies. If you find an
  # order dependency and want to debug it, you can fix the order by providing
  # the seed, which is printed after each run.
  #     --seed 1234
  config.order = :random

  # Seed global randomization in this process using the `--seed` CLI option.
  # Setting this allows you to use `--seed` to deterministically reproduce
  # test failures related to randomization by passing the same `--seed` value
  # as the one that triggered the failure.
  Kernel.srand config.seed
=end
end

試したこと

https://masawada.hatenablog.jp/entry/2018/01/06/012845
こちらの記事を参考に
config.before(:all) do
FactoryBot.reload
end
を追加しましたが解決しません。

補足情報（FW/ツールのバージョンなど）

Rails 5.2.4.1
ruby 2.5.1

gouf

2020/04/02 08:50

どこかで「requre 'factory_bot'」と記述している行があると思いますが、それを「requre 'factory_bot_rails'」に変更した場合、なにか変化は見られますか? Factory not registered: "credit_card" · Issue #341 · thoughtbot/factory_bot_rails https://github.com/thoughtbot/factory_bot_rails/issues/268#issuecomment-384752432