diff --git a/packages/trace-viewer/src/ui/uiModeView.tsx b/packages/trace-viewer/src/ui/uiModeView.tsx
index f48923b6df..2cc76ff8fd 100644
--- a/packages/trace-viewer/src/ui/uiModeView.tsx
+++ b/packages/trace-viewer/src/ui/uiModeView.tsx
@@ -63,6 +63,8 @@ const queryParams = {
   reporters: searchParams.has('reporter') ? searchParams.getAll('reporter') : undefined,
 };
 
+const isMac = navigator.platform === 'MacIntel';
+
 export const UIModeView: React.FC<{}> = ({
 }) => {
   const [filterText, setFilterText] = React.useState<string>('');
@@ -395,7 +397,7 @@ export const UIModeView: React.FC<{}> = ({
           <div className='section-title'>Playwright</div>
           <ToolbarButton icon='color-mode' title='Toggle color mode' onClick={() => toggleTheme()} />
           <ToolbarButton icon='refresh' title='Reload' onClick={() => reloadTests()} disabled={isRunningTest || isLoading}></ToolbarButton>
-          <ToolbarButton icon='terminal' title={'Toggle output — ' + (navigator.platform === 'MacIntel' ? '⌃ `' : 'Ctrl + `')} toggled={isShowingOutput} onClick={() => { setIsShowingOutput(!isShowingOutput); }} />
+          <ToolbarButton icon='terminal' title={'Toggle output — ' + (isMac ? '⌃`' : 'Ctrl + `')} toggled={isShowingOutput} onClick={() => { setIsShowingOutput(!isShowingOutput); }} />
           {!hasBrowsers && <ToolbarButton icon='lightbulb-autofix' style={{ color: 'var(--vscode-list-warningForeground)' }} title='Playwright browsers are missing' onClick={openInstallDialog} />}
         </Toolbar>
         <FiltersView
@@ -415,8 +417,8 @@ export const UIModeView: React.FC<{}> = ({
           {isRunningTest && progress && <div data-testid='status-line' className='status-line'>
             <div>Running {progress.passed}/{runningState.testIds.size} passed ({(progress.passed / runningState.testIds.size) * 100 | 0}%)</div>
           </div>}
-          <ToolbarButton icon='play' title='Run all - F5' onClick={() => runTests('bounce-if-busy', visibleTestIds)} disabled={isRunningTest || isLoading}></ToolbarButton>
-          <ToolbarButton icon='debug-stop' title='Stop - F5 + Shift' onClick={() => testServerConnection?.stopTests({})} disabled={!isRunningTest || isLoading}></ToolbarButton>
+          <ToolbarButton icon='play' title='Run all — F5' onClick={() => runTests('bounce-if-busy', visibleTestIds)} disabled={isRunningTest || isLoading}></ToolbarButton>
+          <ToolbarButton icon='debug-stop' title={'Stop — ' + (isMac ? '⇧F5' : 'Shift + F5')} onClick={() => testServerConnection?.stopTests({})} disabled={!isRunningTest || isLoading}></ToolbarButton>
           <ToolbarButton icon='eye' title='Watch all' toggled={watchAll} onClick={() => {
             setWatchedTreeIds({ value: new Set() });
             setWatchAll(!watchAll);