diff --git a/tests/Bin/RectorTest.php b/tests/Bin/RectorTest.php
index fcb3d619a3a..44658f11723 100644
--- a/tests/Bin/RectorTest.php
+++ b/tests/Bin/RectorTest.php
@@ -35,6 +35,10 @@ public function testConsoleOutput(string $command, string $expectedOutput): void
     {
         $process = Process::fromShellCommandline($command);
         $process->run();
-        $this->assertSame($expectedOutput, preg_replace('/ +/', ' ', $process->getOutput()));
+        $this->assertSame($expectedOutput, preg_replace('/ +/', ' ', $process->getOutput()), sprintf(
+            'exit code %s, stderr: %s',
+            $process->getExitCode() ?? 'not started',
+            $process->getErrorOutput()
+        ));
     }
 }