diff --git a/.github/workflows/testsv2.yml b/.github/workflows/testsv2.yml
index 98679d44..103fff81 100644
--- a/.github/workflows/testsv2.yml
+++ b/.github/workflows/testsv2.yml
@@ -7,7 +7,7 @@ jobs:
     timeout-minutes: 60
     strategy:
       matrix:
-        operating-system: [ubuntu-latest]
+        operating-system: [ubuntu-22.04]
         php-versions: ['8.0', '8.1', '8.2', '8.3']
     name: PHP ${{ matrix.php-versions }} quality/tests on ${{ matrix.operating-system }}
     env:
diff --git a/lib/Phpfastcache/Drivers/Redis/Driver.php b/lib/Phpfastcache/Drivers/Redis/Driver.php
index 49d5e21f..8a24d311 100644
--- a/lib/Phpfastcache/Drivers/Redis/Driver.php
+++ b/lib/Phpfastcache/Drivers/Redis/Driver.php
@@ -125,13 +125,15 @@ protected function driverConnect(): bool
      */
     protected function driverReadAllKeys(string $pattern = '*'): iterable
     {
-        $i = -1;
-        $keys = $this->instance->scan($i, $pattern === '' ? '*' : $pattern, ExtendedCacheItemPoolInterface::MAX_ALL_KEYS_COUNT);
-        if (is_iterable($keys)) {
-            return $keys;
-        } else {
-            return [];
-        }
+        $i = null;
+        $pattern = $pattern === '' ? '*' : $pattern;
+        do {
+            $keys[] = $this->instance->scan($i, $pattern);
+            if (\count($keys) > ExtendedCacheItemPoolInterface::MAX_ALL_KEYS_COUNT) {
+                break;
+            }
+        } while ($i > 0);
+        return \array_merge([], ...$keys);
     }
 
     /**
diff --git a/lib/Phpfastcache/Drivers/Rediscluster/Driver.php b/lib/Phpfastcache/Drivers/Rediscluster/Driver.php
index 54b8afb0..d791201c 100644
--- a/lib/Phpfastcache/Drivers/Rediscluster/Driver.php
+++ b/lib/Phpfastcache/Drivers/Rediscluster/Driver.php
@@ -62,7 +62,8 @@ public function getStats(): DriverStatistic
                     trim(<<<EOF
                         Redis Cluster version v%s, php-ext v%s with %d master nodes and %d slaves connected are up since %s.
                         For more information see RawData.
-                    EOF),
+                    EOF
+                    ),
                     implode(', ', array_unique(array_column($infos, 'redis_version'))),
                     \phpversion("redis"),
                     count($masters),
@@ -123,21 +124,18 @@ protected function driverConnect(): bool
      */
     protected function driverReadAllKeys(string $pattern = '*'): iterable
     {
-        $keys = [[]];
+        $result = [[]];
         foreach ($this->instance->_masters() as $master) {
-            $i = -1;
-            $result = $this->instance->scan(
-                $i,
-                $master,
-                $pattern === '' ? '*' : $pattern,
-                ExtendedCacheItemPoolInterface::MAX_ALL_KEYS_COUNT
-            );
-            if (is_array($result)) {
-                $keys[] = $result;
-            }
+            $i = 0;
+            $pattern = $pattern === '' ? '*' : $pattern;
+            do {
+                $result[] = $this->instance->scan($i, $master, $pattern);
+                if (\count($result) > ExtendedCacheItemPoolInterface::MAX_ALL_KEYS_COUNT) {
+                    break;
+                }
+            } while ($i > 0);
         }
-
-        return array_unique(array_merge(...$keys));
+        return array_unique(\array_merge(...$result));
     }
 
     /**