diff --git a/frontend_tests/node_tests/hotkey.js b/frontend_tests/node_tests/hotkey.js
index 4ade46d1e8..db17d3a83c 100644
--- a/frontend_tests/node_tests/hotkey.js
+++ b/frontend_tests/node_tests/hotkey.js
@@ -140,7 +140,7 @@ function stubbing(func_name_to_stub, test_function) {
     // Unmapped keys should immediately return false, without
     // calling any functions outside of hotkey.js.
     assert_unmapped('abdefhlmnoptuxyz');
-    assert_unmapped('BEFHILMNOQTUVWXYZ');
+    assert_unmapped('BEFHILNOQTUVWXYZ');
 
     // We have to skip some checks due to the way the code is
     // currently organized for mapped keys.
@@ -190,7 +190,7 @@ function stubbing(func_name_to_stub, test_function) {
     assert_mapping('g', 'gear_menu.open');
 
     // Next, test keys that only work on a selected message.
-    var message_view_only_keys = '@*+rRjJkKsSvi:G';
+    var message_view_only_keys = '@*+rRjJkKsSvi:GM';
 
     // Check that they do nothing without a selected message
     global.current_msg_list.empty = return_true;
@@ -200,7 +200,7 @@ function stubbing(func_name_to_stub, test_function) {
 
     // Check that they do nothing while in the settings overlay
     hotkey.is_settings_page = return_true;
-    assert_unmapped('@*+rRjJkKsSvi:G');
+    assert_unmapped('@*+rRjJkKsSvi:GM');
     hotkey.is_settings_page = return_false;
 
     // TODO: Similar check for being in the subs page
@@ -220,6 +220,7 @@ function stubbing(func_name_to_stub, test_function) {
     assert_mapping('i', 'popovers.open_message_menu');
     assert_mapping(':', 'popovers.toggle_reactions_popover', true);
     assert_mapping('G', 'navigate.to_end');
+    assert_mapping('M', 'muting_ui.toggle_mute');
 }());
 
 (function test_motion_keys() {