diff --git a/src/Symfony/Component/Process/PhpProcess.php b/src/Symfony/Component/Process/PhpProcess.php
index 6ebf7377ce..126d9b754f 100644
--- a/src/Symfony/Component/Process/PhpProcess.php
+++ b/src/Symfony/Component/Process/PhpProcess.php
@@ -33,11 +33,10 @@ class PhpProcess extends Process
      */
     public function __construct(string $script, string $cwd = null, array $env = null, int $timeout = 60, array $php = null)
     {
-        $executableFinder = new PhpExecutableFinder();
-        if (false === $php = $php ?? $executableFinder->find(false)) {
-            $php = null;
-        } else {
-            $php = array_merge([$php], $executableFinder->findArguments());
+        if (null === $php) {
+            $executableFinder = new PhpExecutableFinder();
+            $php = $executableFinder->find(false);
+            $php = false === $php ? null : array_merge([$php], $executableFinder->findArguments());
         }
         if ('phpdbg' === \PHP_SAPI) {
             $file = tempnam(sys_get_temp_dir(), 'dbg');
diff --git a/src/Symfony/Component/Process/Tests/PhpProcessTest.php b/src/Symfony/Component/Process/Tests/PhpProcessTest.php
index b0f0a57ace..0355c85be6 100644
--- a/src/Symfony/Component/Process/Tests/PhpProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/PhpProcessTest.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Process\Tests;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\Process\PhpExecutableFinder;
 use Symfony\Component\Process\PhpProcess;
 
 class PhpProcessTest extends TestCase
@@ -45,4 +46,18 @@ PHP
 
         $this->assertSame(PHP_VERSION.\PHP_SAPI, $process->getOutput());
     }
+
+    public function testPassingPhpExplicitly()
+    {
+        $finder = new PhpExecutableFinder();
+        $php = array_merge([$finder->find(false)], $finder->findArguments());
+
+        $expected = 'hello world!';
+        $script = <<<PHP
+<?php echo '$expected';
+PHP;
+        $process = new PhpProcess($script, null, null, 60, $php);
+        $process->run();
+        $this->assertEquals($expected, $process->getOutput());
+    }
 }