fix

tests/Console/Command/DiffTest.php

@@ -204,18 +204,16 @@ public function test_it_cannot_compare_non_existent_files(): void
 
     public function test_it_cannot_compare_a_non_phar_files(): void
     {
+        $this->expectException(InvalidPhar::class);
+        $this->expectExceptionMessageMatches('/^Could not create a Phar or PharData instance for the file.+not\-a\-phar\.phar.+$/');
+
         $this->commandTester->execute(
             [
                 'command' => 'diff',
                 'pharA' => realpath(self::FIXTURES_DIR.'/simple-phar-foo.phar'),
                 'pharB' => realpath(self::FIXTURES_DIR.'/not-a-phar.phar'),
             ],
         );
-
-        $expected = '/^Could not check the PHARs: Could not create a Phar or PharData instance for the file .+$/';
-
-        self::assertMatchesRegularExpression($expected, $this->commandTester->getDisplay(true));
-        self::assertSame(1, $this->commandTester->getStatusCode());
     }
 
     public function test_it_can_compare_phar_files_without_the_phar_extension(): void