testing/README: Fix instructions

TINYCHANGE

testing/README

@@ -15,12 +15,16 @@ The simplest way to run the Org-mode test suite is from the command
 line with the following invocation.  Note that the paths below are
 relative to the base of the Org-mode directory.
 
+Also note that many of the current tests uses babel evaluation...
+
 #+BEGIN_SRC sh :dir (expand-file-name "..")
   # For Emacs earlier than 24, add -L /path/to/ert
   emacs -Q --batch \
         -L lisp/ -L testing/ -L testing/lisp -l lisp/org.el \
         -l lisp/org-id.el -l testing/org-test.el \
-        --eval "(progn (org-reload) (setq org-confirm-babel-evaluate nil))" \
+        --eval "(progn (org-reload) (setq org-confirm-babel-evaluate nil) \
+        (org-babel-do-load-languages 'org-babel-load-languages \
+        '((emacs-lisp . t) (sh . t) (org . t))))" \
         -f org-test-run-batch-tests
 #+END_SRC
 
@@ -43,7 +47,12 @@ load and run the test suite with the following commands.
      (require 'org-test)
    #+END_SRC
 
-2) Then run the test suite,
+2) Disable babel evaluation confirmation
+   #+BEGIN_SRC emacs-lisp
+     (setq org-confirm-babel-evaluate)
+   #+END_SRC
+
+3) Then run the test suite,
    #+BEGIN_SRC emacs-lisp
      (org-test-run-all-tests)
    #+END_SRC