diff --git a/frontend_tests/node_tests/filter.js b/frontend_tests/node_tests/filter.js
index b1a15cb698..7ec41ee6dd 100644
--- a/frontend_tests/node_tests/filter.js
+++ b/frontend_tests/node_tests/filter.js
@@ -8,7 +8,6 @@ zrequire('Filter', 'js/filter');
 
 set_global('message_store', {});
 set_global('page_params', {});
-set_global('feature_flags', {});
 
 const me = {
     email: 'me@example.com',
diff --git a/frontend_tests/node_tests/general.js b/frontend_tests/node_tests/general.js
index f4bbd4b123..d4b50b1576 100644
--- a/frontend_tests/node_tests/general.js
+++ b/frontend_tests/node_tests/general.js
@@ -493,7 +493,6 @@ run_test('insert_message', () => {
 */
 
 set_global('channel', {});
-set_global('feature_flags', {});
 set_global('home_msg_list', {});
 set_global('message_list', {});
 set_global('message_viewport', {});
diff --git a/frontend_tests/node_tests/markdown.js b/frontend_tests/node_tests/markdown.js
index 4580d2502f..d234f68e4f 100644
--- a/frontend_tests/node_tests/markdown.js
+++ b/frontend_tests/node_tests/markdown.js
@@ -55,8 +55,6 @@ set_global('document', doc);
 
 set_global('$', global.make_zjquery());
 
-set_global('feature_flags', {local_echo: true});
-
 const people = global.people;
 
 const cordelia = {
diff --git a/frontend_tests/node_tests/message_list.js b/frontend_tests/node_tests/message_list.js
index 5991bb3d88..e653efcb65 100644
--- a/frontend_tests/node_tests/message_list.js
+++ b/frontend_tests/node_tests/message_list.js
@@ -16,7 +16,6 @@ zrequire('MessageListView', 'js/message_list_view');
 const MessageList = zrequire('message_list').MessageList;
 
 set_global('i18n', global.stub_i18n);
-set_global('feature_flags', {});
 
 const with_overrides = global.with_overrides; // make lint happy
 
diff --git a/frontend_tests/node_tests/message_list_view.js b/frontend_tests/node_tests/message_list_view.js
index 839e2f52a2..44b728c225 100644
--- a/frontend_tests/node_tests/message_list_view.js
+++ b/frontend_tests/node_tests/message_list_view.js
@@ -14,7 +14,6 @@ set_global('page_params', {
     twenty_four_hour_time: false,
 });
 set_global('home_msg_list', null);
-set_global('feature_flags', {twenty_four_hour_time: false});
 set_global('people', {small_avatar_url: function () { return ''; }});
 set_global('unread', {message_unread: function () {}});
 // timerender calls setInterval when imported