Set QT_QPA_PLATFORM=offscreen for Ubuntu etc

Fixes #2569

diff --git a/test/application_system_test_case.rb b/test/application_system_test_case.rb
index 581297313a0dcc7f23e1c1db7403595e80378785..410fe578a51a8483eb7cca6180a652615ebaf610 100644 (file)
--- a/test/application_system_test_case.rb
+++ b/test/application_system_test_case.rb
@@ -4,7 +4,7 @@ require "capybara/poltergeist"
 # Work around weird debian/ubuntu phantomjs
 # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=817277
 # https://github.com/ariya/phantomjs/issues/14376
-ENV["QT_QPA_PLATFORM"] = "phantom" if IO.popen(["phantomjs", "--version"], :err => :close).read.empty?
+ENV["QT_QPA_PLATFORM"] = "offscreen" if IO.popen(["phantomjs", "--version"], :err => :close).read.empty?
 
 ActiveSupport.on_load(:action_dispatch_system_test_case) do
   ActionDispatch::SystemTesting::Server.silence_puma = true