diff --git a/src/AbstractTeller.php b/src/AbstractTeller.php
index fc46e72..9d27c75 100644
--- a/src/AbstractTeller.php
+++ b/src/AbstractTeller.php
@@ -22,116 +22,9 @@ use Psr\Log\{LoggerInterface, LoggerAwareInterface};
  * Actual implementations for Simple Cache interface, so that TypeErrors can be caught and replaced with the
  * PSR-specified exceptions
  */
-abstract class AbstractTeller implements LoggerAwareInterface {
+abstract class AbstractTeller {
 	use _Driver;
 	use LoggerTrait;
 
-	/**
-	 * Set up the cache backend
-	 *
-	 * @param array $config
-	 * @param LoggerInterface|null $logger
-	 */
-	public function __construct(array $config, ?LoggerInterface $logger = NULL)
-	{
-		$this->driver = $this->loadDriver($config);
 
-		if ($logger !== NULL)
-		{
-			$this->setLogger($logger);
-		}
-	}
-
-	/**
-	 * Wipes clean the entire cache's keys.
-	 *
-	 * @return bool True on success and false on failure.
-	 */
-	public function clear(): bool
-	{
-		return $this->driver->flush();
-	}
-
-	/**
-	 * Fetches a value from the cache.
-	 * @throws Exception\InvalidArgumentException
-	 */
-	protected function get(string $key, mixed $default = null): mixed
-	{
-		$this->validateKey($key);
-
-		return ($this->driver->exists($key)) ? $this->driver->get($key) : $default;
-	}
-
-	/**
-	 * Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
-	 * @throws Exception\InvalidArgumentException
-	 */
-	protected function set(string $key, mixed $value, null|int|DateInterval $ttl = null): bool
-	{
-		$this->validateKey($key);
-
-		return $this->driver->set($key, $value, $ttl);
-	}
-
-	/**
-	 * Delete an item from the cache by its unique key.
-	 * @throws Exception\InvalidArgumentException
-	 */
-	protected function delete(string $key): bool
-	{
-		$this->validateKey($key);
-
-		return $this->driver->delete($key);
-	}
-
-	/**
-	 * Obtains multiple cache items by their unique keys.
-	 * @throws Exception\InvalidArgumentException
-	 */
-	protected function getMultiple(iterable $keys, mixed $default = null): iterable
-	{
-		// Check type of keys
-		if ( ! is_iterable($keys))
-		{
-			throw new Exception\InvalidArgumentException('Keys must be an array or a traversable object');
-		}
-
-		$this->validateKeys($keys);
-
-		return $this->driver->getMultiple((array)$keys);
-	}
-
-	/**
-	 * Persists a set of key => value pairs in the cache, with an optional TTL.
-	 */
-	protected function setMultiple(iterable $values, null|int|DateInterval $ttl = null): bool
-	{
-		$this->validateKeys($values, TRUE);
-
-		return ($ttl === NULL)
-			? $this->driver->setMultiple((array)$values)
-			: $this->driver->setMultiple((array)$values, $ttl);
-	}
-
-	/**
-	 * Deletes multiple cache items in a single operation.
-	 */
-	protected function deleteMultiple(iterable $keys): bool
-	{
-		$this->validateKeys($keys);
-
-		return $this->driver->deleteMultiple((array)$keys);
-	}
-
-	/**
-	 * Determines whether an item is present in the cache.
-	 * @throws Exception\InvalidArgumentException
-	 */
-	protected function has(string $key): bool
-	{
-		$this->validateKey($key);
-
-		return $this->driver->exists($key);
-	}
 }
\ No newline at end of file
diff --git a/src/Teller.php b/src/Teller.php
index dd53a24..6207d60 100644
--- a/src/Teller.php
+++ b/src/Teller.php
@@ -17,13 +17,42 @@ namespace Aviat\Banker;
 
 use Aviat\Banker\Exception\InvalidArgumentException;
 use DateInterval;
+use Psr\Log\{LoggerInterface, LoggerAwareInterface};
 use Psr\SimpleCache;
 use TypeError;
 
 /**
  * Implements PSR-16 (SimpleCache)
  */
-class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
+class Teller implements LoggerAwareInterface, SimpleCache\CacheInterface {
+	use _Driver;
+	use LoggerTrait;
+
+	/**
+	 * Set up the cache backend
+	 *
+	 * @param array $config
+	 * @param LoggerInterface|null $logger
+	 */
+	public function __construct(array $config, ?LoggerInterface $logger = NULL)
+	{
+		$this->driver = $this->loadDriver($config);
+
+		if ($logger !== NULL)
+		{
+			$this->setLogger($logger);
+		}
+	}
+
+	/**
+	 * Wipes clean the entire cache's keys.
+	 *
+	 * @return bool True on success and false on failure.
+	 */
+	public function clear(): bool
+	{
+		return $this->driver->flush();
+	}
 
 	/**
 	 * Fetches a value from the cache.
@@ -40,7 +69,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::get($key, $default);
+			return $this->_get($key, $default);
 		}
 		catch (TypeError $e)
 		{
@@ -66,7 +95,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::set($key, $value, $ttl);
+			return $this->_set($key, $value, $ttl);
 		}
 		catch (TypeError $e)
 		{
@@ -88,7 +117,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::delete($key);
+			return $this->_delete($key);
 		}
 		catch (TypeError $e)
 		{
@@ -112,7 +141,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::getMultiple($keys, $default);
+			return $this->_getMultiple($keys, $default);
 		}
 		catch (TypeError $e)
 		{
@@ -138,7 +167,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::setMultiple($values, $ttl);
+			return $this->_setMultiple($values, $ttl);
 		}
 		catch (TypeError $e)
 		{
@@ -161,7 +190,7 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::deleteMultiple($keys);
+			return $this->_deleteMultiple($keys);
 		}
 		catch (TypeError $e)
 		{
@@ -188,11 +217,94 @@ class Teller extends AbstractTeller implements SimpleCache\CacheInterface {
 	{
 		try
 		{
-			return parent::has($key);
+			return $this->_has($key);
 		}
 		catch (TypeError $e)
 		{
 			throw new InvalidArgumentException($e->getMessage(), $e->getCode());
 		}
 	}
+
+	/**
+	 * Fetches a value from the cache.
+	 * @throws Exception\InvalidArgumentException
+	 */
+	protected function _get(string $key, mixed $default = null): mixed
+	{
+		$this->validateKey($key);
+
+		return ($this->driver->exists($key)) ? $this->driver->get($key) : $default;
+	}
+
+	/**
+	 * Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
+	 * @throws Exception\InvalidArgumentException
+	 */
+	protected function _set(string $key, mixed $value, null|int|DateInterval $ttl = null): bool
+	{
+		$this->validateKey($key);
+
+		return $this->driver->set($key, $value, $ttl);
+	}
+
+	/**
+	 * Delete an item from the cache by its unique key.
+	 * @throws Exception\InvalidArgumentException
+	 */
+	protected function _delete(string $key): bool
+	{
+		$this->validateKey($key);
+
+		return $this->driver->delete($key);
+	}
+
+	/**
+	 * Obtains multiple cache items by their unique keys.
+	 * @throws Exception\InvalidArgumentException
+	 */
+	protected function _getMultiple(iterable $keys, mixed $default = null): iterable
+	{
+		// Check type of keys
+		if ( ! is_iterable($keys))
+		{
+			throw new Exception\InvalidArgumentException('Keys must be an array or a traversable object');
+		}
+
+		$this->validateKeys($keys);
+
+		return $this->driver->getMultiple((array)$keys);
+	}
+
+	/**
+	 * Persists a set of key => value pairs in the cache, with an optional TTL.
+	 */
+	protected function _setMultiple(iterable $values, null|int|DateInterval $ttl = null): bool
+	{
+		$this->validateKeys($values, TRUE);
+
+		return ($ttl === NULL)
+			? $this->driver->setMultiple((array)$values)
+			: $this->driver->setMultiple((array)$values, $ttl);
+	}
+
+	/**
+	 * Deletes multiple cache items in a single operation.
+	 */
+	protected function _deleteMultiple(iterable $keys): bool
+	{
+		$this->validateKeys($keys);
+
+		return $this->driver->deleteMultiple((array)$keys);
+	}
+
+	/**
+	 * Determines whether an item is present in the cache.
+	 * @throws Exception\InvalidArgumentException
+	 */
+	protected function _has(string $key): bool
+	{
+		$this->validateKey($key);
+
+		return $this->driver->exists($key);
+	}
 }
\ No newline at end of file
diff --git a/tests/TellerTest.php b/tests/TellerTest.php
index 3fa759e..77cc404 100644
--- a/tests/TellerTest.php
+++ b/tests/TellerTest.php
@@ -58,8 +58,6 @@ class TellerTest extends TestCase {
 
 	public function testGetDefaultLogger(): void
 	{
-		$this->markTestSkipped();
-
 		$friend = new Friend($this->teller);
 		$driverFriend = new Friend($friend->driver);
 
@@ -74,8 +72,6 @@ class TellerTest extends TestCase {
 
 	public function testSetLoggerInConstructor(): void
 	{
-		$this->markTestSkipped();
-
 		$logger = new Logger('test');
 		$logger->pushHandler(new SyslogHandler('warning', LOG_USER, Logger::WARNING));
 
@@ -98,8 +94,6 @@ class TellerTest extends TestCase {
 
 	public function testGetSetLogger(): void
 	{
-		$this->markTestSkipped();
-
 		$logger = new Logger('test');
 		$logger->pushHandler(new SyslogHandler('warning2',LOG_USER, Logger::WARNING));