diff --git a/apps/settings/lib/SetupChecks/MemcacheConfigured.php b/apps/settings/lib/SetupChecks/MemcacheConfigured.php
index c5acf5b5e34ba..2be94d7ed5f0c 100644
--- a/apps/settings/lib/SetupChecks/MemcacheConfigured.php
+++ b/apps/settings/lib/SetupChecks/MemcacheConfigured.php
@@ -59,7 +59,7 @@ public function run(): SetupResult {
 		}
 
 		if ($this->cacheFactory->isLocalCacheAvailable()) {
-			$random = random_bytes(64);
+			$random = bin2hex(random_bytes(64));
 			$local = $this->cacheFactory->createLocal('setupcheck.local');
 			try {
 				$local->set('test', $random);
@@ -76,7 +76,7 @@ public function run(): SetupResult {
 		}
 
 		if ($this->cacheFactory->isAvailable()) {
-			$random = random_bytes(64);
+			$random = bin2hex(random_bytes(64));
 			$distributed = $this->cacheFactory->createDistributed('setupcheck');
 			try {
 				$distributed->set('test', $random);