diff --git a/devtools/client/shared/components/SearchBox.js b/devtools/client/shared/components/SearchBox.js
index b24e2171a364..7af6e0639290 100644
--- a/devtools/client/shared/components/SearchBox.js
+++ b/devtools/client/shared/components/SearchBox.js
@@ -161,11 +161,9 @@ class SearchBox extends PureComponent {
 
     switch (e.key) {
       case "ArrowDown":
-        e.preventDefault();
         autocomplete.jumpBy(1);
         break;
       case "ArrowUp":
-        e.preventDefault();
         autocomplete.jumpBy(-1);
         break;
       case "PageDown":
diff --git a/devtools/client/shared/components/test/chrome/test_searchbox-with-autocomplete.html b/devtools/client/shared/components/test/chrome/test_searchbox-with-autocomplete.html
index 110d5640c1e7..7bec93bc4666 100644
--- a/devtools/client/shared/components/test/chrome/test_searchbox-with-autocomplete.html
+++ b/devtools/client/shared/components/test/chrome/test_searchbox-with-autocomplete.html
@@ -39,13 +39,6 @@ window.onload = async function () {
       "Autocomplete items are rendered as expected");
   }
 
-  function compareCursorPosition(initialElement) {
-    const initialPosition = initialElement.selectionStart;
-    return (element) => {
-      is(element.selectionStart, initialPosition, "Input cursor position is not changed");
-    }
-  }
-
   const React = browserRequire("devtools/client/shared/vendor/react");
   const SearchBox = React.createFactory(
     browserRequire("devtools/client/shared/components/SearchBox")
@@ -123,7 +116,6 @@ window.onload = async function () {
   async function testKeyEventsWithAutocomplete() {
     // Clear the initial input
     $(".devtools-searchinput").focus();
-    const cursorPositionIsNotChanged = compareCursorPosition($(".devtools-searchinput"));
 
     // ArrowDown
     synthesizeKey("KEY_ArrowDown");
@@ -154,7 +146,6 @@ window.onload = async function () {
       "a5",
       "[abc]",
     ]);
-    cursorPositionIsNotChanged($(".devtools-searchinput"));
 
     // PageDown should take -5 places up
     synthesizeKey("KEY_PageUp");
@@ -168,7 +159,6 @@ window.onload = async function () {
       "a5",
       "abc",
     ]);
-    cursorPositionIsNotChanged($(".devtools-searchinput"));
 
     // PageDown should take +5 places down
     synthesizeKey("KEY_PageDown");
@@ -182,7 +172,6 @@ window.onload = async function () {
       "a5",
       "[abc]",
     ]);
-    cursorPositionIsNotChanged($(".devtools-searchinput"));
 
     // Home should take to the top of the list
     synthesizeKey("KEY_Home");
@@ -196,7 +185,6 @@ window.onload = async function () {
       "a5",
       "abc",
     ]);
-    cursorPositionIsNotChanged($(".devtools-searchinput"));
 
     // End should take to the bottom of the list
     synthesizeKey("KEY_End");
@@ -210,7 +198,6 @@ window.onload = async function () {
       "a5",
       "[abc]",
     ]);
-    cursorPositionIsNotChanged($(".devtools-searchinput"));
 
     // Key down in existing state should rollover to the top
     synthesizeKey("KEY_ArrowDown");