+my $i3_pid;
+my $i3_autostart;
+
+END {
+
+ # testcases which start i3 manually should always call exit_gracefully
+ # on their own. Let’s see, whether they really did.
+ if (! $i3_autostart) {
+ return unless $i3_pid;
+
+ $tester->ok(undef, 'testcase called exit_gracefully()');
+ }
+
+ # don't trigger SIGCHLD handler
+ local $SIG{CHLD};
+
+ # From perldoc -v '$?':
+ # Inside an "END" subroutine $? contains the value
+ # that is going to be given to "exit()".
+ #
+ # Since waitpid sets $?, we need to localize it,
+ # otherwise TAP would be misinterpreted our return status
+ local $?;
+
+ # When measuring code coverage, try to exit i3 cleanly (otherwise, .gcda
+ # files are not written)
+ if ($ENV{COVERAGE} || $ENV{VALGRIND}) {
+ exit_gracefully($i3_pid, "/tmp/nested-$ENV{DISPLAY}");
+
+ } else {
+ kill(9, $i3_pid)
+ or $tester->BAIL_OUT("could not kill i3");
+
+ waitpid $i3_pid, 0;
+ }
+}
+