diff --git a/run-tests.php b/run-tests.php
index 830dcd759be..935f821f4e6 100755
--- a/run-tests.php
+++ b/run-tests.php
@@ -597,6 +597,15 @@ if (isset($argc) && $argc > 1) {
 					putenv("TEST_PHP_EXECUTABLE=$php");
 					$environment['TEST_PHP_EXECUTABLE'] = $php;
 					break;
+				case 'P':
+					if(constant('PHP_BINARY')) {
+						$php = PHP_BINARY;
+					} else {
+						break;
+					}
+					putenv("TEST_PHP_EXECUTABLE=$php");
+					$environment['TEST_PHP_EXECUTABLE'] = $php;
+					break;
 				case 'q':
 					putenv('NO_INTERACTION=1');
 					break;
@@ -686,6 +695,8 @@ Options:
 
     -p <php>    Specify PHP executable to run.
 
+    -P          Use PHP_BINARY as PHP executable to run.
+
     -q          Quiet, no user interaction (same as environment NO_INTERACTION).
 
     -s <file>   Write output to <file>.