diff --git a/src/Command/AnalyserRunner.php b/src/Command/AnalyserRunner.php
index 6e5a92467d..2b0d936cae 100644
--- a/src/Command/AnalyserRunner.php
+++ b/src/Command/AnalyserRunner.php
@@ -62,6 +62,7 @@ public function runAnalyser(
 			&& function_exists('proc_open')
 			&& $mainScript !== null
 			&& $schedule->getNumberOfProcesses() > 0
+			&& count($files) > 1
 		) {
 			$loop = new StreamSelectLoop();
 			$result = null;