diff --git a/client/site_tests/desktopui_CheckRlzPingSent/desktopui_CheckRlzPingSent.py b/client/site_tests/desktopui_CheckRlzPingSent/desktopui_CheckRlzPingSent.py
index 6a3cf1e..980a063 100644
--- a/client/site_tests/desktopui_CheckRlzPingSent/desktopui_CheckRlzPingSent.py
+++ b/client/site_tests/desktopui_CheckRlzPingSent/desktopui_CheckRlzPingSent.py
@@ -80,20 +80,25 @@
             raise error.TestFail('Timed out trying to lock the device')
 
 
-    def run_once(self, logged_in=True):
+    def run_once(self, ping_timeout=30, logged_in=True):
         """
         Main entry to the test.
 
-        @param logged_in: True for real login or guest mode.
+        @param logged_in: True for real login or False for guest mode.
+        @param ping_timeout: Delay time (seconds) before rlz ping is sent.
 
         """
+        # Browser arg to make DUT send rlz ping after a short delay.
+        rlz_flag = '--rlz-ping-delay=%d' % ping_timeout
+
         # If we are testing the ping is sent in guest mode (logged_in=False),
         # we need to first do a real login and wait for the DUT to become
         # 'locked' for rlz. Then logout and enter guest mode.
         if not logged_in:
-            with chrome.Chrome(logged_in=True):
+            with chrome.Chrome(logged_in=True, extra_browser_args=rlz_flag):
                 self._wait_for_rlz_lock()
 
-        with chrome.Chrome(logged_in=logged_in) as cr:
+        with chrome.Chrome(logged_in=logged_in,
+                           extra_browser_args=rlz_flag) as cr:
             self._check_url_for_rlz(cr)
             self._verify_rlz_data()
diff --git a/server/site_tests/rlz_CheckPing/rlz_CheckPing.py b/server/site_tests/rlz_CheckPing/rlz_CheckPing.py
index a9f6394..40b6286 100644
--- a/server/site_tests/rlz_CheckPing/rlz_CheckPing.py
+++ b/server/site_tests/rlz_CheckPing/rlz_CheckPing.py
@@ -54,15 +54,6 @@
                                          '%s' % e.result_obj.stderr)
 
 
-    def _make_rootfs_writable(self):
-        """ Remove rootfs verification on DUT."""
-        logging.info('Disabling rootfs on the DUT.')
-        cmd = ('/usr/share/vboot/bin/make_dev_ssd.sh '
-               '--remove_rootfs_verification --force')
-        self._host.run(cmd)
-        self._host.reboot()
-
-
     def _check_rlz_vpd_settings_post_ping(self):
         """Checks that rlz related vpd settings are correct after the test."""
         def should_send_rlz_ping():
@@ -79,15 +70,6 @@
             raise error.TestFail('rlz_embargo_end_date still present in vpd.')
 
 
-    def _reduce_rlz_ping_delay(self, ping_timeout):
-        """Changes the rlz ping delay so we can test it quickly."""
-
-        # Removes any old rlz ping delays in the file.
-        self._host.run('sed -i /--rlz-ping-delay/d /etc/chrome_dev.conf')
-        self._host.run('echo --rlz-ping-delay=%d >> /etc/chrome_dev.conf' %
-                       ping_timeout)
-
-
     def run_once(self, host, ping_timeout=30, logged_in=True):
         """Main test logic"""
         self._host = host
@@ -101,8 +83,6 @@
 
         # Setup DUT to send rlz ping after a short timeout.
         self._set_vpd_values()
-        self._make_rootfs_writable()
-        self._reduce_rlz_ping_delay(ping_timeout)
         self._host.reboot()
 
         # Login, do a Google search, check for CAF event in RLZ Data file.