diff --git a/src/Grant/AbstractGrant.php b/src/Grant/AbstractGrant.php
index e2caed89..fd7b1e48 100644
--- a/src/Grant/AbstractGrant.php
+++ b/src/Grant/AbstractGrant.php
@@ -194,7 +194,6 @@ abstract class AbstractGrant implements GrantTypeInterface
      * Validate scopes in the request.
      *
      * @param string                                               $scopes
-     * @param \League\OAuth2\Server\Entities\ClientEntityInterface $client
      * @param string                                               $redirectUri
      *
      * @throws \League\OAuth2\Server\Exception\OAuthServerException
@@ -203,7 +202,6 @@ abstract class AbstractGrant implements GrantTypeInterface
      */
     public function validateScopes(
         $scopes,
-        ClientEntityInterface $client,
         $redirectUri = null
     ) {
         $scopesList = array_filter(
diff --git a/src/Grant/AuthCodeGrant.php b/src/Grant/AuthCodeGrant.php
index a4cf5dd1..c8b496a4 100644
--- a/src/Grant/AuthCodeGrant.php
+++ b/src/Grant/AuthCodeGrant.php
@@ -186,7 +186,6 @@ class AuthCodeGrant extends AbstractAuthorizeGrant
 
         $scopes = $this->validateScopes(
             $this->getQueryStringParameter('scope', $request),
-            $client,
             $client->getRedirectUri()
         );
 
diff --git a/src/Grant/ClientCredentialsGrant.php b/src/Grant/ClientCredentialsGrant.php
index 49493372..c8ff2d52 100644
--- a/src/Grant/ClientCredentialsGrant.php
+++ b/src/Grant/ClientCredentialsGrant.php
@@ -28,7 +28,7 @@ class ClientCredentialsGrant extends AbstractGrant
     ) {
         // Validate request
         $client = $this->validateClient($request);
-        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request), $client);
+        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request));
 
         // Finalize the requested scopes
         $scopes = $this->scopeRepository->finalizeScopes($scopes, $this->getIdentifier(), $client);
diff --git a/src/Grant/ImplicitGrant.php b/src/Grant/ImplicitGrant.php
index 497542d5..92e5b84b 100644
--- a/src/Grant/ImplicitGrant.php
+++ b/src/Grant/ImplicitGrant.php
@@ -80,7 +80,6 @@ class ImplicitGrant extends AbstractAuthorizeGrant
 
         $scopes = $this->validateScopes(
             $this->getQueryStringParameter('scope', $request),
-            $client,
             $client->getRedirectUri()
         );
 
diff --git a/src/Grant/PasswordGrant.php b/src/Grant/PasswordGrant.php
index 29262306..6d98115d 100644
--- a/src/Grant/PasswordGrant.php
+++ b/src/Grant/PasswordGrant.php
@@ -48,7 +48,7 @@ class PasswordGrant extends AbstractGrant
     ) {
         // Validate request
         $client = $this->validateClient($request);
-        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request), $client);
+        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request));
         $user = $this->validateUser($request, $client);
 
         // Finalize the requested scopes
diff --git a/src/Grant/RefreshTokenGrant.php b/src/Grant/RefreshTokenGrant.php
index 43249647..168e9908 100644
--- a/src/Grant/RefreshTokenGrant.php
+++ b/src/Grant/RefreshTokenGrant.php
@@ -42,7 +42,7 @@ class RefreshTokenGrant extends AbstractGrant
         // Validate request
         $client = $this->validateClient($request);
         $oldRefreshToken = $this->validateOldRefreshToken($request, $client->getIdentifier());
-        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request), $client);
+        $scopes = $this->validateScopes($this->getRequestParameter('scope', $request));
 
         // If no new scopes are requested then give the access token the original session scopes
         if (count($scopes) === 0) {
diff --git a/tests/Grant/AbstractGrantTest.php b/tests/Grant/AbstractGrantTest.php
index 27fe44d5..1321654d 100644
--- a/tests/Grant/AbstractGrantTest.php
+++ b/tests/Grant/AbstractGrantTest.php
@@ -374,7 +374,7 @@ class AbstractGrantTest extends \PHPUnit_Framework_TestCase
         $grantMock = $this->getMockForAbstractClass(AbstractGrant::class);
         $grantMock->setScopeRepository($scopeRepositoryMock);
 
-        $this->assertEquals([$scope], $grantMock->validateScopes('basic   ', new ClientEntity()));
+        $this->assertEquals([$scope], $grantMock->validateScopes('basic   '));
     }
 
     /**
@@ -389,7 +389,7 @@ class AbstractGrantTest extends \PHPUnit_Framework_TestCase
         $grantMock = $this->getMockForAbstractClass(AbstractGrant::class);
         $grantMock->setScopeRepository($scopeRepositoryMock);
 
-        $grantMock->validateScopes('basic   ', new ClientEntity());
+        $grantMock->validateScopes('basic   ');
     }
 
     public function testGenerateUniqueIdentifier()