```ruby
require "last_hit/version"
require "last_hit/configure"

require 'last_hit/rc_adapter'
require 'last_hit/file_filter'

require 'last_hit/test_handler'

module LastHit
  class << self
    def run_modified_tests
      files = RcAdapter::GitAdapter.get_modified_files
      process(files)
    end

    def run_current_branch_tests(another_branch)
      files = RcAdapter::GitAdapter.get_current_branch_files(another_branch)
      process(files)
    end

    private

    def process(files)
      tests = FileFilter::SpecFilter.get_files(files)
      TestHandler.run(tests)
    end
  end
end
```

Use instance method instead of class method
user
```ruby
require "last_hit/version"
require "last_hit/configure"

require 'last_hit/rc_adapter'
require 'last_hit/file_filter'

require 'last_hit/test_handler'

class LastHit
  def modified_tests
    files = RcAdapter::GitAdapter.modified_files
    process(files)
  end

  def all_tests(base_branch)
    files = RcAdapter::GitAdapter.get_current_branch_files(base_branch)
    process(files)
  end

  private

  def process(files)
    tests = FileFilter::SpecFilter.get_files(files)
    TestHandler.run(tests)
  end
end
```
assistant