diff --git a/lib/widgets/fullscreen/info/info_page.dart b/lib/widgets/fullscreen/info/info_page.dart
index 9142f62ca..adf9b7abf 100644
--- a/lib/widgets/fullscreen/info/info_page.dart
+++ b/lib/widgets/fullscreen/info/info_page.dart
@@ -40,6 +40,7 @@ class InfoPageState extends State<InfoPage> {
 
     final appBar = SliverAppBar(
       leading: IconButton(
+        key: Key('back-button'),
         icon: Icon(AIcons.goUp),
         onPressed: _goToImage,
         tooltip: 'Back to image',
diff --git a/lib/widgets/fullscreen/info/metadata_section.dart b/lib/widgets/fullscreen/info/metadata_section.dart
index f2544e1a4..fb3cf769e 100644
--- a/lib/widgets/fullscreen/info/metadata_section.dart
+++ b/lib/widgets/fullscreen/info/metadata_section.dart
@@ -87,6 +87,7 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
               accentColor: Colors.white,
             ),
             child: ExpansionTileCard(
+              key: Key('tilecard-${dir.name}'),
               value: dir.name,
               expandedNotifier: _expandedDirectoryNotifier,
               title: _DirectoryTitle(dir.name),
diff --git a/test_driver/app_test.dart b/test_driver/app_test.dart
index 51474292d..9d9fd8052 100644
--- a/test_driver/app_test.dart
+++ b/test_driver/app_test.dart
@@ -5,14 +5,16 @@ import 'package:pedantic/pedantic.dart';
 import 'package:test/test.dart';
 
 import 'constants.dart';
+import 'driver_extension.dart';
 import 'utils.dart';
 
+FlutterDriver driver;
+
 void main() {
   group('Aves app', () {
-    FlutterDriver driver;
+    print('adb=${[adb, ...adbDeviceParam].join(' ')}');
 
     setUpAll(() async {
-      print('adb=${[adb, ...adbDeviceParam].join(' ')}');
       await copyContent(sourcePicturesDir, targetPicturesDir);
       await grantPermissions('deckers.thibault.aves.debug', [
         'android.permission.READ_EXTERNAL_STORAGE',
@@ -24,89 +26,147 @@ void main() {
 
     tearDownAll(() async {
       await removeDirectory(targetPicturesDir);
-      if (driver != null) {
-        unawaited(driver.close());
-      }
+      unawaited(driver?.close());
     });
 
-    test('agree to terms and reach home', () async {
-      await driver.scroll(find.text('Terms of Service'), 0, -300, Duration(milliseconds: 500));
+    agreeToTerms();
+    sortCollection();
+    groupCollection();
+    searchAlbum();
+    showFullscreen();
+    toggleOverlay();
+    zoom();
+    showInfoMetadata();
 
-      final buttonFinder = find.byValueKey('continue-button');
-      expect(await isEnabled(driver, buttonFinder), equals(false));
-
-      await driver.tap(find.byValueKey('agree-checkbox'));
-      await Future.delayed(Duration(seconds: 1));
-      expect(await isEnabled(driver, buttonFinder), equals(true));
-
-      await driver.tap(buttonFinder);
-      await driver.waitUntilNoTransientCallbacks();
-
-      expect(await driver.getText(find.byValueKey('appbar-title')), 'Aves');
-    });
-
-    test('sort collection', () async {
-      await driver.tap(find.byValueKey('appbar-menu-button'));
-      await driver.waitUntilNoTransientCallbacks();
-
-      await driver.tap(find.byValueKey('menu-sort'));
-      await driver.waitUntilNoTransientCallbacks();
-
-      await driver.tap(find.byValueKey(SortFactor.date.toString()));
-      await driver.tap(find.byValueKey('apply-button'));
-    });
-
-    test('group collection', () async {
-      await driver.tap(find.byValueKey('appbar-menu-button'));
-      await driver.waitUntilNoTransientCallbacks();
-
-      await driver.tap(find.byValueKey('menu-group'));
-      await driver.waitUntilNoTransientCallbacks();
-
-      await driver.tap(find.byValueKey(GroupFactor.album.toString()));
-      await driver.tap(find.byValueKey('apply-button'));
-    });
-
-    test('search album', () async {
-      await driver.tap(find.byValueKey('search-button'));
-      await driver.waitUntilNoTransientCallbacks();
-
-      final album = path.split(targetPicturesDir).last;
-      await driver.tap(find.byType('TextField'));
-      await driver.enterText(album);
-
-      final albumChipFinder = find.byValueKey('album-$album');
-      await driver.waitFor(albumChipFinder);
-      await driver.tap(albumChipFinder);
-    });
-
-    test('show fullscreen', () async {
-      await driver.tap(find.byType('DecoratedThumbnail'));
-      await driver.waitUntilNoTransientCallbacks();
-      await Future.delayed(Duration(seconds: 2));
-
-      final imageViewFinder = find.byValueKey('imageview');
-
-      print('* hide overlay');
-      await driver.tap(imageViewFinder);
-      await Future.delayed(Duration(seconds: 1));
-
-      print('* show overlay');
-      await driver.tap(imageViewFinder);
-      await Future.delayed(Duration(seconds: 1));
-    });
-
-    test('show info', () async {
-      final verticalPageViewFinder = find.byValueKey('vertical-pageview');
-
-      print('* scroll to info');
-      await driver.scroll(verticalPageViewFinder, 0, -600, Duration(milliseconds: 400));
-      await Future.delayed(Duration(seconds: 1));
-
-      // TODO TLAD find.pageBack
-//      print('* back to image');
-//      await driver.tap(find.pageBack());
-//      await Future.delayed(Duration(seconds: 5));
+    test('contemplation', () async {
+      await Future.delayed(Duration(seconds: 5));
     });
   }, timeout: Timeout(Duration(seconds: 10)));
 }
+
+void agreeToTerms() {
+  test('[welcome] agree to terms', () async {
+    await driver.scroll(find.text('Terms of Service'), 0, -300, Duration(milliseconds: 500));
+
+    final buttonFinder = find.byValueKey('continue-button');
+    expect(await isEnabled(driver, buttonFinder), equals(false));
+
+    await driver.tap(find.byValueKey('agree-checkbox'));
+    await Future.delayed(Duration(seconds: 1));
+    expect(await isEnabled(driver, buttonFinder), equals(true));
+
+    await driver.tap(buttonFinder);
+    await driver.waitUntilNoTransientCallbacks();
+
+    expect(await driver.getText(find.byValueKey('appbar-title')), 'Aves');
+  });
+}
+
+void groupCollection() {
+  test('[collection] group', () async {
+    await driver.tap(find.byValueKey('appbar-menu-button'));
+    await driver.waitUntilNoTransientCallbacks();
+
+    await driver.tap(find.byValueKey('menu-group'));
+    await driver.waitUntilNoTransientCallbacks();
+
+    await driver.tap(find.byValueKey(GroupFactor.album.toString()));
+    await driver.tap(find.byValueKey('apply-button'));
+  });
+}
+
+void sortCollection() {
+  test('[collection] sort', () async {
+    await driver.tap(find.byValueKey('appbar-menu-button'));
+    await driver.waitUntilNoTransientCallbacks();
+
+    await driver.tap(find.byValueKey('menu-sort'));
+    await driver.waitUntilNoTransientCallbacks();
+
+    await driver.tap(find.byValueKey(SortFactor.date.toString()));
+    await driver.tap(find.byValueKey('apply-button'));
+  });
+}
+
+void searchAlbum() {
+  test('[collection] search album', () async {
+    await driver.tap(find.byValueKey('search-button'));
+    await driver.waitUntilNoTransientCallbacks();
+
+    final album = path.split(targetPicturesDir).last;
+    await driver.tap(find.byType('TextField'));
+    await driver.enterText(album);
+
+    final albumChipFinder = find.byValueKey('album-$album');
+    await driver.waitFor(albumChipFinder);
+    await driver.tap(albumChipFinder);
+  });
+}
+
+void showFullscreen() {
+  test('[collection] show fullscreen', () async {
+    await driver.tap(find.byType('DecoratedThumbnail'));
+    await driver.waitUntilNoTransientCallbacks();
+    await Future.delayed(Duration(seconds: 2));
+  });
+}
+
+void toggleOverlay() {
+  test('[fullscreen] toggle overlay', () async {
+    final imageViewFinder = find.byValueKey('imageview');
+
+    print('* hide overlay');
+    await driver.tap(imageViewFinder);
+    await Future.delayed(Duration(seconds: 1));
+
+    print('* show overlay');
+    await driver.tap(imageViewFinder);
+    await Future.delayed(Duration(seconds: 1));
+  });
+}
+
+void zoom() {
+  test('[fullscreen] zoom cycle', () async {
+    final imageViewFinder = find.byValueKey('imageview');
+
+    await driver.doubleTap(imageViewFinder);
+    await Future.delayed(Duration(seconds: 1));
+
+    await driver.doubleTap(imageViewFinder);
+    await Future.delayed(Duration(seconds: 1));
+
+    await driver.doubleTap(imageViewFinder);
+    await Future.delayed(Duration(seconds: 1));
+  });
+}
+
+void showInfoMetadata() {
+  test('[fullscreen] show info', () async {
+    final verticalPageViewFinder = find.byValueKey('vertical-pageview');
+
+    print('* scroll down to info');
+    await driver.scroll(verticalPageViewFinder, 0, -600, Duration(milliseconds: 400));
+    await Future.delayed(Duration(seconds: 2));
+
+    print('* scroll down to metadata details');
+    await driver.scroll(verticalPageViewFinder, 0, -800, Duration(milliseconds: 600));
+    await Future.delayed(Duration(seconds: 1));
+
+    print('* toggle GPS metadata');
+    final gpsTileFinder = find.descendant(
+      of: find.byValueKey('tilecard-GPS'),
+      matching: find.byType('ListTile'),
+    );
+    await driver.tap(gpsTileFinder);
+    await driver.waitUntilNoTransientCallbacks();
+    await driver.tap(gpsTileFinder);
+    await driver.waitUntilNoTransientCallbacks();
+
+    print('* scroll up to show app bar');
+    await driver.scroll(verticalPageViewFinder, 0, 100, Duration(milliseconds: 400));
+    await Future.delayed(Duration(seconds: 1));
+
+    print('* back to image');
+    await driver.tap(find.byValueKey('back-button'));
+  });
+}
diff --git a/test_driver/driver_extension.dart b/test_driver/driver_extension.dart
new file mode 100644
index 000000000..9e10657c9
--- /dev/null
+++ b/test_driver/driver_extension.dart
@@ -0,0 +1,11 @@
+import 'package:flutter_driver/flutter_driver.dart';
+
+extension ExtraFlutterDriver on FlutterDriver {
+  static const doubleTapDelay = Duration(milliseconds: 100); // in [kDoubleTapMinTime = 40 ms, kDoubleTapTimeout = 300 ms]
+
+  Future doubleTap(SerializableFinder finder, {Duration timeout}) async {
+    await tap(finder, timeout: timeout);
+    await Future.delayed(doubleTapDelay);
+    await tap(finder, timeout: timeout);
+  }
+}