Skip failing scrolling tests on Qt 5.10 on Travis

See #3572

pytest.ini

@@ -26,6 +26,7 @@ markers =
     this: Used to mark tests during development
     no_invalid_lines: Don't fail on unparseable lines in end2end tests
     issue2478: Tests which are broken on Windows with QtWebEngine, https://github.com/qutebrowser/qutebrowser/issues/2478
+    issue3572: Tests which are broken with QtWebEngine and Qt 5.10, https://github.com/qutebrowser/qutebrowser/issues/3572
     fake_os: Fake utils.is_* to a fake operating system
     unicode_locale: Tests which need an unicode locale to work
 qt_log_level_fail = WARNING

tests/conftest.py

@@ -64,6 +64,10 @@ def _apply_platform_markers(config, item):
         ('no_ci', 'CI' in os.environ, "Skipped on CI."),
         ('issue2478', utils.is_windows and config.webengine,
          "Broken with QtWebEngine on Windows"),
+        ('issue3572',
+         qtutils.version_check('5.10', compiled=False, exact=True) and
+         config.webengine and 'TRAVIS' in os.environ,
+         "Broken with QtWebEngine with Qt 5.10 on Travis"),
         ('unicode_locale', sys.getfilesystemencoding() == 'ascii',
          "Skipped because of ASCII locale"),
     ]

tests/end2end/features/scroll.feature

@@ -233,6 +233,7 @@ Feature: Scrolling
         Then the page should be scrolled vertically
         
     # https://github.com/qutebrowser/qutebrowser/issues/1821
+    @issue3572
     Scenario: :scroll-to-perc without doctype
         When I open data/scroll/no_doctype.html
         And I run :scroll-to-perc 100
@@ -315,6 +316,7 @@ Feature: Scrolling
 
     ## issues
 
+    @issue3572
     Scenario: Relative scroll position with a position:absolute page
         When I open data/scroll/position_absolute.html
         And I run :scroll-to-perc 100