Merge branch '8.5' into 9.6

* 8.5:
  Add test for #6406

Author: sebastianbergmann

tests/end-to-end/regression/6406.phpt

@@ -0,0 +1,19 @@
+--TEST--
+https://github.com/sebastianbergmann/phpunit/issues/6406
+--FILE--
+<?php declare(strict_types=1);
+$_SERVER['argv'][] = '--do-not-cache-result';
+$_SERVER['argv'][] = '--no-configuration';
+$_SERVER['argv'][] = __DIR__ . '/6406/Issue6406Test.php';
+
+require_once __DIR__ . '/../../bootstrap.php';
+
+PHPUnit\TextUI\Command::main();
+--EXPECTF--
+PHPUnit %s by Sebastian Bergmann and contributors.
+
+..                                                                  2 / 2 (100%)
+
+Time: %s, Memory: %s
+
+OK (2 tests, 2 assertions)

tests/end-to-end/regression/6406/Issue6406Test.php

@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace PHPUnit\TestFixture\Issue6406;
+
+use const INF;
+use const NAN;
+use PHPUnit\Framework\TestCase;
+
+final class Issue6406Test extends TestCase
+{
+    public static function provider(): array
+    {
+        return [
+            'inf' => [INF],
+            'nan' => [NAN],
+        ];
+    }
+
+    /**
+     * @dataProvider provider
+     */
+    public function testOne($value): void
+    {
+        $this->assertTrue(true);
+    }
+}