--- a/browser/components/preferences/in-content/tests/browser_engines.js
+++ b/browser/components/preferences/in-content/tests/browser_engines.js
@@ -11,16 +11,16 @@ add_task(async function() {
   let defaultEngines = Services.search.getDefaultEngines();
   for(let i=0; i<defaultEngines.length; i++) {
       let engine = defaultEngines[i];
       let cellName = tree.view.getCellText(i, tree.columns.getNamedColumn('engineName'));
       is(cellName, engine.name, 'Default search engine ' + engine.name + ' displayed correctly');
   }
 
   // Avoid duplicated keywords
-  tree.view.setCellText(0,tree.columns.getNamedColumn('engineKeyword'), 'keyword');
-  tree.view.setCellText(1,tree.columns.getNamedColumn('engineKeyword'), 'keyword');
-  let cellKeyword = tree.view.getCellText(1,tree.columns.getNamedColumn('engineKeyword'));
+  tree.view.setCellText(0, tree.columns.getNamedColumn('engineKeyword'), 'keyword');
+  tree.view.setCellText(1, tree.columns.getNamedColumn('engineKeyword'), 'keyword');
+  let cellKeyword = tree.view.getCellText(1, tree.columns.getNamedColumn('engineKeyword'));
   isnot(cellKeyword, 'keyword', 'Do not allow duplicated keywords');
 
   await BrowserTestUtils.removeTab(gBrowser.selectedTab);
 });