diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
new file mode 100644
index 0000000..3a9284c
--- /dev/null
+++ b/.php-cs-fixer.dist.php
@@ -0,0 +1,39 @@
+<?php
+
+/*
+ * This file is part of PHP CS Fixer / PHPUnit Constraint IsIdenticalString.
+ *
+ * (c) Dariusz Rumiński <dariusz.ruminski@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+use PhpCsFixer\Config;
+use PhpCsFixer\Finder;
+
+$header = <<<'EOF'
+This file is part of PHP CS Fixer / PHPUnit Constraint IsIdenticalString.
+
+(c) Dariusz Rumiński <dariusz.ruminski@gmail.com>
+
+This source file is subject to the MIT license that is bundled
+with this source code in the file LICENSE.
+EOF;
+
+$finder = Finder::create()
+    ->exclude('tests/Fixtures')
+    ->in(__DIR__)
+    ->append([__FILE__])
+;
+
+return (new Config())
+    ->setRiskyAllowed(true)
+    ->setRules([
+        '@PhpCsFixer' => true,
+        '@PhpCsFixer:risky' => true,
+        '@PHPUnit60Migration:risky' => true,
+        'header_comment' => ['header' => $header],
+    ])
+    ->setFinder($finder)
+;
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
deleted file mode 100644
index 58ed836..0000000
--- a/.php-cs-fixer.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-
-$header = <<<'EOF'
-This file is part of PHP CS Fixer / PHPUnit Constraint IsIdenticalString.
-
-(c) Dariusz Rumiński <dariusz.ruminski@gmail.com>
-
-This source file is subject to the MIT license that is bundled
-with this source code in the file LICENSE.
-EOF;
-
-$finder = PhpCsFixer\Finder::create()
-    ->exclude('tests/Fixtures')
-    ->in(__DIR__)
-;
-
-return (new PhpCsFixer\Config)
-    ->setRiskyAllowed(true)
-    ->setRules([
-        '@PhpCsFixer'               => true,
-        '@PhpCsFixer:risky'         => true,
-        '@PHPUnit60Migration:risky' => true,
-        'header_comment'            => ['header' => $header],
-    ])
-    ->setFinder($finder)
-;