diff --git a/ext/standard/tests/strings/bug37244.phpt b/ext/standard/tests/strings/bug37244.phpt
new file mode 100644
index 00000000000..0718c8a4d3e
--- /dev/null
+++ b/ext/standard/tests/strings/bug37244.phpt
@@ -0,0 +1,18 @@
+--TEST--
+Bug #37244 (base64_decode violates RFC 3548)
+--FILE--
+<?php
+$strings = array(
+    'SW1wbGVtZW50YXRpb25zIE1VU1QgcmVqZWN0IHRoZSBlbmNvZGluZyBpZiBpdCBjb250YWlucyBjaGFyYWN0ZXJzIG91dHNpZGUgdGhlIGJhc2UgYWxwaGFiZXQu',
+    'SW1wbGVtZW$0YXRpb25zIE1VU1QgcmVqZWN0IHRoZSBlbmNvZGluZyBpZiBpdCBjb250YWlucyBjaGFyYWN0ZXJzIG91dHNpZGUgdGhlIGJhc2UgYWxwaGFiZXQu',
+    'SW1wbGVtZW0YXRpb25zIE1VU1QgcmVqZWN0IHRoZSBlbmNvZGluZyBpZiBpdCBjb250YWlucyBjaGFyYWN0ZXJzIG91dHNpZGUgdGhlIGJhc2UgYWxwaGFiZXQu'
+);
+foreach($strings as $string) {
+    var_dump(base64_decode($string, true));
+}
+?>
+--EXPECT--
+string(93) "Implementations MUST reject the encoding if it contains characters outside the base alphabet."
+bool(false)
+string(92) "Implemem][ۜ�UT��Z�X�H[���[��Y�]�۝Z[���\�X�\���]�YHH�\�H[X�]"
+