--- a/widget/tests/test_keycodes.xul
+++ b/widget/tests/test_keycodes.xul
@@ -3239,26 +3239,26 @@ function* runXULKeyTests()
                           modifiers:{metaKey:1}, chars:"'", unmodifiedChars:"'"},
                          "reservedUnshiftedKey");
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:MAC_VK_ANSI_Quote,
                           modifiers:{metaKey:1, shiftKey:1}, chars:"\"", unmodifiedChars:"'"},
                          "reservedShiftedKey");
   }
   else if (IS_WIN) {
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:WIN_VK_OEM_1,
-                          modifiers:{ctrlKey:1}, chars:";"},
+                          modifiers:{ctrlKey:1}, chars:""},
                          "unshiftedKey");
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:WIN_VK_OEM_1,
-                          modifiers:{ctrlKey:1, shiftKey:1}, chars:";"},
+                          modifiers:{ctrlKey:1, shiftKey:1}, chars:""},
                          "shiftedKey");
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:WIN_VK_OEM_7,
-                          modifiers:{ctrlKey:1}, chars:"'"},
+                          modifiers:{ctrlKey:1}, chars:""},
                          "reservedUnshiftedKey");
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:WIN_VK_OEM_7,
-                          modifiers:{ctrlKey:1, shiftKey:1}, chars:"'"},
+                          modifiers:{ctrlKey:1, shiftKey:1}, chars:""},
                          "reservedShiftedKey");
   }
 
   // 429160
   if (IS_MAC) {
     yield testKeyElement({layout:KEYBOARD_LAYOUT_EN_US, keyCode:MAC_VK_ANSI_F,
                           modifiers:{metaKey:1, altKey:1}, chars:"\u0192", unmodifiedChars:"f"},
                          "commandOptionF");
@@ -3434,17 +3434,17 @@ function* runReservedKeyTests()
 
   if (IS_MAC) {
     // Cmd+T is reserved for opening new tab.
     yield testReservedKey({layout:KEYBOARD_LAYOUT_EN_US, keyCode:MAC_VK_ANSI_T,
                            modifiers:{metaKey:1}, chars:"t", unmodifiedChars:"t"});
   } else if (IS_WIN) {
     // Ctrl+T is reserved for opening new tab.
     yield testReservedKey({layout:KEYBOARD_LAYOUT_EN_US, keyCode:WIN_VK_T,
-                           modifiers:{ctrlKey:1}, chars:"t"});
+                           modifiers:{ctrlKey:1}, chars:"\u0014"});
   }
 
   finializeKeyElementTest();
 }
 
 function* runTextInputTests()
 {
   var textbox = document.getElementById("textbox");