Use NegatedMatcher for not_match_xxx matchers

lib/capybara/rspec/matchers.rb

@@ -274,8 +274,6 @@ module Capybara
       MatchSelector.new(*args, &optional_filter_block)
     end
 
-    ::RSpec::Matchers.define_negated_matcher :not_match_selector, :match_selector if defined?(::RSpec::Matchers)
-
     # RSpec matcher for whether elements(s) matching a given xpath selector exist
     # See {Capybara::Node::Matchers#has_xpath?}
     def have_xpath(xpath, **options, &optional_filter_block)
@@ -364,6 +362,12 @@ module Capybara
     end
     alias_method :have_no_content, :have_no_text
 
+    %w[selector css xpath].each do |matcher_type|
+      define_method "not_match_#{matcher_type}" do |*args, &optional_filter_block|
+        NegatedMatcher.new(send("match_#{matcher_type}", *args, &optional_filter_block))
+      end
+    end
+
     ##
     # Wait for window to become closed.
     # @example

lib/capybara/spec/session/has_text_spec.rb

@@ -253,7 +253,7 @@ Capybara::SpecHelper.spec '#has_no_text?' do
     expect(@session).not_to have_no_text('exercitation ullamco laboris')
   end
 
-  it "should be true if the given text is not on the page", :focus_ do
+  it "should be true if the given text is not on the page" do
     @session.visit('/with_html')
     expect(@session).to have_no_text('xxxxyzzz')
     expect(@session).to have_no_text('monkey')