Fix acceptance tests.

cms/djangoapps/contentstore/features/video.feature

@@ -46,26 +46,26 @@ Feature: CMS.Video Component
   Scenario: Closed captions become visible when the mouse hovers over CC button
     Given I have created a Video component with subtitles
     And Make sure captions are closed
-    Then Captions become invisible after 3 seconds
+    Then Captions become "invisible" after 3 seconds
     And I hover over button "CC"
-    Then Captions become visible
+    Then Captions become "visible"
     And I hover over button "volume"
-    Then Captions become invisible after 3 seconds
+    Then Captions become "invisible" after 3 seconds
 
   # 8
   Scenario: Open captions never become invisible
     Given I have created a Video component with subtitles
     And Make sure captions are open
-    Then Captions are visible
+    Then Captions are "visible"
     And I hover over button "CC"
-    Then Captions are visible after 3 seconds
+    Then Captions are "visible" after 3 seconds
     And I hover over button "volume"
-    Then Captions are visible after 3 seconds
+    Then Captions are "visible" after 3 seconds
 
   # 9
   Scenario: Closed captions are invisible when mouse doesn't hover on CC button
     Given I have created a Video component with subtitles
     And Make sure captions are closed
-    Then Captions become invisible after 3 seconds
+    Then Captions become "invisible" after 3 seconds
     And I hover over button "volume"
-    Then Captions are invisible
+    Then Captions are "invisible"

cms/djangoapps/contentstore/features/video.py

@@ -135,15 +135,15 @@ def set_captions_visibility_state(_step, captions_state):
 
 @step('I hover over button "([^"]*)"$')
 def hover_over_button(_step, button):
-    world.browser.find_by_css(BUTTONS[button.strip()]).mouse_over()
+    world.css_find(BUTTONS[button.strip()]).mouse_over()
 
 
-@step('Captions (?:are|become) (.+)$')
+@step('Captions (?:are|become) "([^"]*)"$')
 def are_captions_visibile(_step, visibility_state):
-    _step.given('Captions are {0} after 0 seconds'.format(visibility_state))
+    _step.given('Captions become "{0}" after 0 seconds'.format(visibility_state))
 
 
-@step('Captions (?:are|become) (.+) after (.+) seconds$')
+@step('Captions (?:are|become) "([^"]*)" after (.+) seconds$')
 def check_captions_visibility_state(_step, visibility_state, timeout):
     timeout = int(timeout.strip())