diff --git a/src/PSR7/SpecFinder.php b/src/PSR7/SpecFinder.php
index c668b058..a3ad854b 100644
--- a/src/PSR7/SpecFinder.php
+++ b/src/PSR7/SpecFinder.php
@@ -26,6 +26,7 @@
 use function json_decode;
 use function json_encode;
 use function property_exists;
+use function substr;
 
 final class SpecFinder
 {
@@ -211,10 +212,10 @@ public function findResponseSpec($addr): ResponseSpec
 
         $response = $operation->responses->getResponse((string) $addr->responseCode());
 
-        if (! $response){
-            $response = $operation->responses->getResponse(substr((string)$addr->responseCode(),0,1) . 'XX');
+        if (! $response) {
+            $response = $operation->responses->getResponse(substr((string) $addr->responseCode(), 0, 1) . 'XX');
         }
-        
+
         if (! $response) {
             $response = $operation->responses->getResponse('default');
         }
diff --git a/tests/PSR7/SpecFinderTest.php b/tests/PSR7/SpecFinderTest.php
index d9f6c785..2a5501b7 100644
--- a/tests/PSR7/SpecFinderTest.php
+++ b/tests/PSR7/SpecFinderTest.php
@@ -163,8 +163,8 @@ public function testResponseStatusCodesWithWildcards(): void
                     type: string
 YAML;
 
-        $schema = (new ValidatorBuilder())->fromYaml($yaml)->getServerRequestValidator()->getSchema();
-        $specFinder = new SpecFinder($schema);
+        $schema       = (new ValidatorBuilder())->fromYaml($yaml)->getServerRequestValidator()->getSchema();
+        $specFinder   = new SpecFinder($schema);
         $responseSpec = $specFinder->findResponseSpec(
             new ResponseAddress('/products.find', 'get', 404)
         );