This test is consistently flaky over time in the bots with messages such as: TEST: /path/to/TestWebKitAPI/WebKitGTK/TestWebViewEditor... /webkit/WebKitWebView/editable/editable: PASS GLib-GIO-DEBUG: GTask init_compose_table_async (source object: (nil), source tag: 0x...) finalized without ever returning (using g_task_return_*()). This potentially indicates a bug in the program.