diff --git a/tests/unit/javascript/test_js_execution.py b/tests/unit/javascript/test_js_execution.py
index 901c373c4..c5b5018d2 100644
--- a/tests/unit/javascript/test_js_execution.py
+++ b/tests/unit/javascript/test_js_execution.py
@@ -47,15 +47,32 @@ def test_element_js_webkit(webview, js_enabled, expected):
 
 
 @pytest.mark.usefixtures('redirect_webengine_data')
-@pytest.mark.parametrize('js_enabled, expected', [(True, 2.0), (False, 2.0)])
-def test_simple_js_webengine(callback_checker, webengineview, js_enabled,
-                             expected):
+@pytest.mark.parametrize('js_enabled, world, expected', [
+    # main world
+    (True, 0, 2.0),
+    (False, 0, None),
+    # application world
+    (True, 1, 2.0),
+    (False, 1, 2.0),
+    # user world
+    (True, 2, 2.0),
+    (False, 2, 2.0),
+])
+def test_simple_js_webengine(callback_checker, webengineview, qapp,
+                             js_enabled, world, expected):
     """With QtWebEngine, runJavaScript works even when JS is off."""
     # If we get there (because of the webengineview fixture) we can be certain
     # QtWebEngine is available
-    from PyQt5.QtWebEngineWidgets import QWebEngineSettings
-    webengineview.settings().setAttribute(QWebEngineSettings.JavascriptEnabled,
-                                          js_enabled)
+    from PyQt5.QtWebEngineWidgets import QWebEngineSettings, QWebEngineScript
 
-    webengineview.page().runJavaScript('1 + 1', callback_checker.callback)
+    assert world in [QWebEngineScript.MainWorld,
+                     QWebEngineScript.ApplicationWorld,
+                     QWebEngineScript.UserWorld]
+
+    settings = webengineview.settings()
+    settings.setAttribute(QWebEngineSettings.JavascriptEnabled, js_enabled)
+    qapp.processEvents()
+
+    page = webengineview.page()
+    page.runJavaScript('1 + 1', world, callback_checker.callback)
     callback_checker.check(expected)