diff --git a/ext/gd/tests/bug77269.phpt b/ext/gd/tests/bug77269.phpt
deleted file mode 100644
index 2bd5758e1a903..0000000000000
--- a/ext/gd/tests/bug77269.phpt
+++ /dev/null
@@ -1,18 +0,0 @@
---TEST--
-Bug #77269 (Potential unsigned underflow in gdImageScale)
---SKIPIF--
-<?php
-if (!extension_loaded('gd')) die('skip gd extension not available');
-if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
-?>
---INI--
-memory_limit=2G
---FILE--
-<?php
-$im = imagecreate(2**28, 1);
-imagescale($im, 1, 1, IMG_TRIANGLE);
-
-?>
---EXPECTF--
-Warning: imagescale():%S Product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully
- in %s on line %d
diff --git a/ext/gd/tests/bug77272.phpt b/ext/gd/tests/bug77272.phpt
index 678333f06c0eb..e5cf816f78264 100644
--- a/ext/gd/tests/bug77272.phpt
+++ b/ext/gd/tests/bug77272.phpt
@@ -5,6 +5,7 @@ memory_limit=-1
 --SKIPIF--
 <?php
 if (!extension_loaded('gd')) die('skip gd extension not available');
+if (PHP_INT_SIZE != 8) die("skip this test is for 64bit platform only");
 if (!GD_BUNDLED && version_compare(GD_VERSION, '2.2.5', '<=')) die('skip upstream fix not yet released');
 if (getenv("SKIP_SLOW_TESTS")) die("skip slow test");
 ?>
diff --git a/ext/sysvshm/tests/bug72858.phpt b/ext/sysvshm/tests/bug72858.phpt
index efa72edb5b1e0..905eb49c8f4d1 100644
--- a/ext/sysvshm/tests/bug72858.phpt
+++ b/ext/sysvshm/tests/bug72858.phpt
@@ -3,16 +3,15 @@ Bug #72858 shm_attach null dereference
 --SKIPIF--
 <?php
 if (!extension_loaded("sysvshm")){ print 'skip'; }
-if (4 < PHP_INT_SIZE) { print "skip 32-bit only"; }
 if (substr(PHP_OS, 0, 3) != "WIN") { print "skip windows only"; }
 ?>
 --FILE--
 <?php
 
-$v1=100;
-$v2=0xffffffff / 4 + 0x1337;
-shm_attach($v1,$v2);
+$v1 = 100;
+$v2 = PHP_INT_MAX;
+shm_attach($v1, $v2);
 
 ?>
 --EXPECTF--
-Warning: shm_attach(): Failed for key 0x64: Not enough space in %s on line %d
+Warning: shm_attach(): Failed for key 0x64: No error in %s on line %d