diff --git a/cms/static/cms/js/require-config.js b/cms/static/cms/js/require-config.js
index 426fae9f59..0ec76eb22a 100644
--- a/cms/static/cms/js/require-config.js
+++ b/cms/static/cms/js/require-config.js
@@ -95,7 +95,7 @@
             // end of Annotation tool files
 
             // externally hosted files
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
             'youtube': [
                 // youtube URL does not end in '.js'. We add '?noext' to the path so
                 // that require.js adds the '.js' to the query component of the URL,
diff --git a/cms/static/cms/js/spec/main.js b/cms/static/cms/js/spec/main.js
index a74bf1cb9f..86923264a8 100644
--- a/cms/static/cms/js/spec/main.js
+++ b/cms/static/cms/js/spec/main.js
@@ -56,7 +56,7 @@
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
             'URI': 'xmodule_js/common_static/js/vendor/URI.min',
             'mock-ajax': 'xmodule_js/common_static/js/vendor/mock-ajax',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix',
             'js/spec/test_utils': 'js/spec/test_utils'
diff --git a/cms/static/cms/js/spec/main_squire.js b/cms/static/cms/js/spec/main_squire.js
index b4eb462775..49850e0999 100644
--- a/cms/static/cms/js/spec/main_squire.js
+++ b/cms/static/cms/js/spec/main_squire.js
@@ -48,7 +48,7 @@
             'draggabilly': 'xmodule_js/common_static/js/vendor/draggabilly',
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
             'URI': 'xmodule_js/common_static/js/vendor/URI.min',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',   // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix'
         },
diff --git a/common/static/common/js/discussion/mathjax_include.js b/common/static/common/js/discussion/mathjax_include.js
index 942dc54b58..34594f86ca 100644
--- a/common/static/common/js/discussion/mathjax_include.js
+++ b/common/static/common/js/discussion/mathjax_include.js
@@ -42,6 +42,6 @@ if (typeof MathJax === 'undefined') {
             });
         };
     };
-    vendorScript.src = 'https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG';
+    vendorScript.src = 'https://cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG';
     document.body.appendChild(vendorScript);
 }
diff --git a/common/templates/mathjax_include.html b/common/templates/mathjax_include.html
index c41818c3e5..7c8d0c99ca 100644
--- a/common/templates/mathjax_include.html
+++ b/common/templates/mathjax_include.html
@@ -76,4 +76,4 @@
 <!-- This must appear after all mathjax-config blocks, so it is after the imports from the other templates.
      It can't be run through static.url because MathJax uses crazy url introspection to do lazy loading of
      MathJax extension libraries -->
-<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG"></script>
+<script type="text/javascript" src="https://cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG"></script>
diff --git a/common/test/acceptance/pages/lms/teams.py b/common/test/acceptance/pages/lms/teams.py
index 467b5885b0..2bf616622e 100644
--- a/common/test/acceptance/pages/lms/teams.py
+++ b/common/test/acceptance/pages/lms/teams.py
@@ -502,6 +502,10 @@ class TeamPage(CoursePage, PaginatedUIMixin, BreadcrumbsMixin):
 
     def click_leave_team_link(self, remaining_members=0, cancel=False):
         """ Click on Leave Team link"""
+        self.wait_for(
+            lambda: self.team_leave_link_present,
+            description="Leave Team button did not become present"
+        )
         self.q(css='.leave-team-link').first.click()
         confirm_prompt(self, cancel, require_notification=False)
 
diff --git a/lms/static/lms/js/spec/main.js b/lms/static/lms/js/spec/main.js
index a1ffbcd859..2586aac146 100644
--- a/lms/static/lms/js/spec/main.js
+++ b/lms/static/lms/js/spec/main.js
@@ -51,7 +51,7 @@
             'squire': 'xmodule_js/common_static/js/vendor/Squire',
             'jasmine-imagediff': 'xmodule_js/common_static/js/vendor/jasmine-imagediff',
             'domReady': 'xmodule_js/common_static/js/vendor/domReady',
-            mathjax: '//cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
+            mathjax: '//cdn.mathjax.org/mathjax/2.7-latest/MathJax.js?config=TeX-MML-AM_SVG&delayStartupUntil=configured',  // eslint-disable-line max-len
             'youtube': '//www.youtube.com/player_api?noext',
             'coffee/src/ajax_prefix': 'xmodule_js/common_static/coffee/src/ajax_prefix',
             'coffee/src/instructor_dashboard/student_admin': 'coffee/src/instructor_dashboard/student_admin',