When filling out forms in Selenium tests, Chrome shows the (usual) bubble, asking to store those credentials.

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While the bubble does not interfere with tests, it is annoying when debugging tests. Here are two ways to disable it:

Option 1: prefs

You can set profile preferences to disable the password manager like so:

prefs = {
  'credentials_enable_service' => false,
  'profile.password_manager_enabled' => false
}

Capybara::Selenium::Driver.new(app, browser: :chrome, prefs: prefs)

Sadly, there are no command line switches for this.

Option 2: Incognito mode

Alternatively, use Incognito mode to make the bubble go away.

Capybara::Selenium::Driver.new(app, browser: :chrome, args: %w[--incognito])

Note that Incognito mode may have other impacts.