Mitigate jRuby build failures

spec/spec_helper.rb

@@ -71,11 +71,23 @@
 
   config.verbose_retry = true
   config.display_try_failure_messages = true
+  config.default_sleep_interval = 1 if RUBY_ENGINE == 'jruby'
   config.around :each, :js do |example|
     example.run_with_retry retry: (ENV['CI'] && RUBY_ENGINE == 'jruby' ? 3 : 2)
   end
   config.retry_callback = proc do |example|
-    Capybara.reset! if example.metadata[:js]
+    if example.metadata[:js]
+      attempt = 0
+      begin
+        Capybara.reset!
+      rescue Ferrum::TimeoutError, Ferrum::NoExecutionContextError
+        attempt += 1
+        raise if attempt >= 3
+
+        sleep attempt
+        retry
+      end
+    end
   end
 
   config.before(:all) do