diff --git a/src/Driver/ApcuDriver.php b/src/Driver/ApcuDriver.php
index 320f6ea..ba58084 100644
--- a/src/Driver/ApcuDriver.php
+++ b/src/Driver/ApcuDriver.php
@@ -76,7 +76,7 @@ class ApcuDriver extends AbstractDriver {
 		$this->validateKeys($keys);
 
 		$status = FALSE;
-		return apcu_fetch($keys, $status);
+		return (array)apcu_fetch($keys, $status);
 	}
 
 	/**
diff --git a/src/Driver/RedisDriver.php b/src/Driver/RedisDriver.php
index 589a8df..4e5a788 100644
--- a/src/Driver/RedisDriver.php
+++ b/src/Driver/RedisDriver.php
@@ -78,13 +78,11 @@ class RedisDriver extends AbstractDriver {
 	 */
 	public function get(string $key): mixed
 	{
-		$raw = $this->conn->get($key);
-		if ($raw === NULL)
-		{
-			return null;
-		}
+		$raw = $this->conn->get($key) ?? '';
+		$parsed = @unserialize($raw);
+		$hasError = is_array(error_get_last());
 
-		return unserialize($raw);
+		return ($hasError) ? NULL : $parsed;
 	}
 
 	/**
diff --git a/src/ItemCollection.php b/src/ItemCollection.php
index 9743774..6780bda 100644
--- a/src/ItemCollection.php
+++ b/src/ItemCollection.php
@@ -25,6 +25,7 @@ use JsonSerializable;
  *
  * @see http://php.net/manual/en/class.arrayiterator.php
  * @see http://php.net/manual/en/class.jsonserializable.php
+ * @extends ArrayIterator<string, CacheItemInterface>
  */
 class ItemCollection extends ArrayIterator implements JsonSerializable {
 
@@ -39,7 +40,7 @@ class ItemCollection extends ArrayIterator implements JsonSerializable {
 	 * Create the collection object from the raw
 	 * CacheItemInterface array
 	 *
-	 * @param array $items - array of CacheItemInterface objects
+	 * @param CacheItemInterface[] $items - array of CacheItemInterface objects
 	 * @param int $flags - flags
 	 */
 	public function __construct(array $items = [], int $flags = 0)
@@ -51,7 +52,7 @@ class ItemCollection extends ArrayIterator implements JsonSerializable {
 	/**
 	 * Specify what data to serialize when using `json_encode`
 	 *
-	 * @return array - The full set of data to be serialized
+	 * @return CacheItemInterface[] - The full set of data to be serialized
 	 */
 	public function jsonSerialize(): array
 	{
diff --git a/src/Pool.php b/src/Pool.php
index 2837238..7867ba7 100644
--- a/src/Pool.php
+++ b/src/Pool.php
@@ -26,6 +26,7 @@ use function is_string;
  */
 final class Pool implements CacheItemPoolInterface, LoggerAwareInterface {
 	use _Driver;
+	use KeyValidateTrait;
 	use LoggerTrait;
 
 	/**
diff --git a/src/Teller.php b/src/Teller.php
index c5cf126..e1b3d4d 100644
--- a/src/Teller.php
+++ b/src/Teller.php
@@ -24,6 +24,7 @@ use Psr\SimpleCache;
  */
 class Teller implements LoggerAwareInterface, SimpleCache\CacheInterface {
 	use _Driver;
+	use KeyValidateTrait;
 	use LoggerTrait;
 
 	/**
diff --git a/src/_Driver.php b/src/_Driver.php
index 6f1c17c..e19cd5d 100644
--- a/src/_Driver.php
+++ b/src/_Driver.php
@@ -21,20 +21,13 @@ use Aviat\Banker\Driver\AbstractDriver;
  * Private trait for shared driver-related functionality
  */
 trait _Driver {
-	use KeyValidateTrait;
-
 	/**
 	 * Driver class for handling the chosen caching backend
-	 *
-	 * @var AbstractDriver
 	 */
 	private AbstractDriver $driver;
 
 	/**
 	 * Instantiate the appropriate cache backend based on the config
-	 *
-	 * @param array $driverConfig
-	 * @return AbstractDriver
 	 */
 	protected function loadDriver(array $driverConfig = []): AbstractDriver
 	{
@@ -44,6 +37,7 @@ trait _Driver {
 		$driverConfig['connection'] = $driverConfig['connection'] ?? [];
 		$driverConfig['options'] = $driverConfig['options'] ?? [];
 
+		// @phpstan-ignore-next-line
 		return new $class($driverConfig['connection'], $driverConfig['options']);
 	}
 }
\ No newline at end of file
diff --git a/tests/ItemCollectionTest.php b/tests/ItemCollectionTest.php
index d8f82c2..9346114 100644
--- a/tests/ItemCollectionTest.php
+++ b/tests/ItemCollectionTest.php
@@ -20,7 +20,7 @@ use PHPUnit\Framework\TestCase;
 
 class ItemCollectionTest extends TestCase {
 
-	protected $collection;
+	protected ItemCollection $collection;
 
 	public function setUp(): void
 	{