diff --git a/tests/Reflection/CodeFileTest.php b/tests/Reflection/CodeFileTest.php
index 03c6caf..22500f2 100644
--- a/tests/Reflection/CodeFileTest.php
+++ b/tests/Reflection/CodeFileTest.php
@@ -1,45 +1,72 @@
 <?php
 declare(strict_types=1);
 
 namespace Keruald\OmniTools\Tests\Reflection;
 
 use Keruald\OmniTools\Reflection\CodeFile;
 use Keruald\OmniTools\Tests\WithData;
 use PHPUnit\Framework\TestCase;
 
 use Acme\MockLib\Bar; // a mock class in a mock namespace to test include
 
 class CodeFileTest extends TestCase {
 
     use WithData;
 
     /**
      * @var CodeFile
      */
     private $validCodeFile;
 
     /**
      * @var CodeFile
      */
     private $notExistingCodeFile;
 
     public function setUp () : void {
         $file = $this->getDataPath("MockLib/Bar.php");
         $this->validCodeFile = CodeFile::from($file);
 
         $this->notExistingCodeFile = CodeFile::from("/notexisting");
     }
 
     public function testCanInclude () : void {
         $this->assertTrue($this->validCodeFile->canBeIncluded());
         $this->assertFalse($this->notExistingCodeFile->canBeIncluded());
     }
 
+    public function testCanBeIncludedWhenFileModeForbidsReading () : void {
+        $file = $this->getNonReadableFile();
+
+        $this->assertFalse(CodeFile::From($file)->canBeIncluded());
+
+        unlink($file);
+    }
+
     public function testTryInclude () : void {
         $this->assertTrue($this->validCodeFile->tryInclude());
         $this->assertTrue(class_exists(Bar::class));
 
         $this->assertFalse($this->notExistingCodeFile->tryInclude());
     }
 
+    public function testIsReadable () : void {
+        $this->assertTrue($this->validCodeFile->isReadable());
+    }
+
+    public function testIsReadableWhenFileModeForbidsReading () : void {
+        $file = $this->getNonReadableFile();
+
+        $this->assertFalse(CodeFile::From($file)->isReadable());
+
+        unlink($file);
+    }
+
+    private function getNonReadableFile () : string {
+        $file = tempnam(sys_get_temp_dir(), "testCodeFile");
+        chmod($file, 0);
+
+        return $file;
+    }
+
 }