No require for `test-helper`, it is loaded by ert-runner (fixes #6).

test/test-helper.el

@@ -81,5 +81,5 @@
 
 (defun xwwp-wait-for (script)
   "Wait until scripts evaluate to true")
-(provide 'test-helper)
+
 ;;; test-helper.el ends here

test/xwwp-follow-link-test.el

@@ -22,7 +22,6 @@
 ;;; Code:
 
 (require 'cl-lib)
-(require 'test-helper)
 (require 'with-simulated-input)
 (require 'xwwp-follow-link)
 (require 'xwwp-follow-link-ido)

test/xwwp-test.el

@@ -21,7 +21,6 @@
 
 ;;; Code:
 
-(require 'test-helper)
 (require 'xwwp)
 
 (ert-deftest test-xwwp-js-register-function ()