diff --git a/Classes/Middleware/FallbackMiddleware.php b/Classes/Middleware/FallbackMiddleware.php
index 2d9b5b8b417..9dde2419741 100644
--- a/Classes/Middleware/FallbackMiddleware.php
+++ b/Classes/Middleware/FallbackMiddleware.php
@@ -126,7 +126,7 @@ protected function getHeaders(ServerRequestInterface $request, string &$possible
     protected function getCacheConfiguration(string $possibleStaticFile): array
     {
         $configFile = $possibleStaticFile . '.config.json';
-        if (is_file($configFile) || !is_readable($configFile)) {
+        if (is_file($configFile) && is_readable($configFile)) {
             return (array) json_decode((string) GeneralUtility::getUrl($configFile), true);
         }
 
diff --git a/Tests/Unit/Middleware/FallbackMiddlewareTest.php b/Tests/Unit/Middleware/FallbackMiddlewareTest.php
new file mode 100644
index 00000000000..4986a04524d
--- /dev/null
+++ b/Tests/Unit/Middleware/FallbackMiddlewareTest.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SFC\Staticfilecache\Tests\Unit\Middleware;
+
+use SFC\Staticfilecache\Middleware\FallbackMiddleware;
+use SFC\Staticfilecache\Tests\Unit\AbstractTest;
+
+/**
+ * @internal
+ * @coversNothing
+ */
+final class FallbackMiddlewareTest extends AbstractTest
+{
+    public function testMissingConfigurationFileIsIgnoredWithoutWarning(): void
+    {
+        $subject = (new \ReflectionClass(TestableFallbackMiddleware::class))->newInstanceWithoutConstructor();
+        $possibleStaticFile = sys_get_temp_dir() . '/staticfilecache-' . bin2hex(random_bytes(8)) . '/index';
+
+        set_error_handler(
+            static function (int $severity, string $message, string $file, int $line): never {
+                throw new \ErrorException($message, 0, $severity, $file, $line);
+            },
+        );
+
+        try {
+            self::assertSame([], $subject->getCacheConfigurationForTest($possibleStaticFile));
+        } finally {
+            restore_error_handler();
+        }
+    }
+}
+
+final class TestableFallbackMiddleware extends FallbackMiddleware
+{
+    public function getCacheConfigurationForTest(string $possibleStaticFile): array
+    {
+        return parent::getCacheConfiguration($possibleStaticFile);
+    }
+}