--- a/testing/marionette/client/marionette_driver/marionette.py
+++ b/testing/marionette/client/marionette_driver/marionette.py
@@ -537,18 +537,17 @@ class Alert(object):
         Alert(marionette).dismiss()
     """
 
     def __init__(self, marionette):
         self.marionette = marionette
 
     def accept(self):
         """Accept a currently displayed modal dialog."""
-        # TODO: Switch to "WebDriver:AcceptAlert" in Firefox 62
-        self.marionette._send_message("WebDriver:AcceptDialog")
+        self.marionette._send_message("WebDriver:AcceptAlert")
 
     def dismiss(self):
         """Dismiss a currently displayed modal dialog."""
         self.marionette._send_message("WebDriver:DismissAlert")
 
     @property
     def text(self):
         """Return the currently displayed text in a tab modal."""