diff --git a/ext/gd/tests/bug42434.phpt b/ext/gd/tests/bug42434.phpt
new file mode 100644
index 00000000000..cede1ac17fe
--- /dev/null
+++ b/ext/gd/tests/bug42434.phpt
@@ -0,0 +1,26 @@
+--TEST--
+Bug #42434 (ImageLine w/ antialias = 1px shorter)
+--SKIPIF--
+<?php
+if (!extension_loaded('gd')) {
+	die('skip gd extension not available');
+}
+?>
+--FILE--
+<?php
+$im = imagecreatetruecolor(10, 2);
+imagefilledrectangle($im, 0, 0, 10, 2, 0xFFFFFF);
+
+imageantialias($im, true);
+imageline($im, 0, 0, 10, 0, 0x000000);
+
+if (imagecolorat($im, 9, 0) == 0x000000) {
+	echo 'DONE';
+} else {
+	echo 'Bugged';
+}
+
+imagedestroy($im);
+?>
+--EXPECTF--
+DONE
\ No newline at end of file