diff --git a/Dbal/Schema.php b/Dbal/Schema.php
index 56ea9dc..ff9ee01 100644
--- a/Dbal/Schema.php
+++ b/Dbal/Schema.php
@@ -94,9 +94,9 @@ protected function addEntryTable()
         $table->addUniqueIndex(['class_id', 'object_identity_id', 'field_name', 'ace_order']);
         $table->addIndex(['class_id', 'object_identity_id', 'security_identity_id']);
 
-        $table->addForeignKeyConstraint($this->getTable($this->options['class_table_name']), ['class_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
-        $table->addForeignKeyConstraint($this->getTable($this->options['oid_table_name']), ['object_identity_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
-        $table->addForeignKeyConstraint($this->getTable($this->options['sid_table_name']), ['security_identity_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
+        $table->addForeignKeyConstraint($this->getTable($this->options['class_table_name'])->getName(), ['class_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
+        $table->addForeignKeyConstraint($this->getTable($this->options['oid_table_name'])->getName(), ['object_identity_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
+        $table->addForeignKeyConstraint($this->getTable($this->options['sid_table_name'])->getName(), ['security_identity_id'], ['id'], ['onDelete' => 'CASCADE', 'onUpdate' => 'CASCADE']);
     }
 
     /**
@@ -116,7 +116,7 @@ protected function addObjectIdentitiesTable()
         $table->addUniqueIndex(['object_identifier', 'class_id']);
         $table->addIndex(['parent_object_identity_id']);
 
-        $table->addForeignKeyConstraint($table, ['parent_object_identity_id'], ['id']);
+        $table->addForeignKeyConstraint($table->getName(), ['parent_object_identity_id'], ['id']);
     }
 
     /**
@@ -137,8 +137,8 @@ protected function addObjectIdentityAncestorsTable()
             // MS SQL Server does not support recursive cascading
             $action = 'NO ACTION';
         }
-        $table->addForeignKeyConstraint($oidTable, ['object_identity_id'], ['id'], ['onDelete' => $action, 'onUpdate' => $action]);
-        $table->addForeignKeyConstraint($oidTable, ['ancestor_id'], ['id'], ['onDelete' => $action, 'onUpdate' => $action]);
+        $table->addForeignKeyConstraint($oidTable->getName(), ['object_identity_id'], ['id'], ['onDelete' => $action, 'onUpdate' => $action]);
+        $table->addForeignKeyConstraint($oidTable->getName(), ['ancestor_id'], ['id'], ['onDelete' => $action, 'onUpdate' => $action]);
     }
 
     /**
diff --git a/Tests/Dbal/MutableAclProviderTest.php b/Tests/Dbal/MutableAclProviderTest.php
index d29a0d9..368a399 100644
--- a/Tests/Dbal/MutableAclProviderTest.php
+++ b/Tests/Dbal/MutableAclProviderTest.php
@@ -263,7 +263,7 @@ public function testUpdateDoesNothingWhenThereAreNoChanges()
         ;
         $con
             ->expects($this->never())
-            ->method('executeUpdate')
+            ->method('executeStatement')
         ;
 
         $provider = new MutableAclProvider($con, new PermissionGrantingStrategy(), []);
@@ -536,7 +536,10 @@ protected function setUp(): void
             ],
             $configuration
         );
-        $this->connection->setNestTransactionsWithSavepoints(true);
+        if (method_exists($configuration, 'setNestTransactionsWithSavepoints')) {
+            // DBAL < 4.0
+            $this->connection->setNestTransactionsWithSavepoints(true);
+        }
 
         // import the schema
         $schema = new Schema($this->getOptions());
@@ -547,6 +550,7 @@ protected function setUp(): void
 
     protected function tearDown(): void
     {
+        $this->connection->close();
         $this->connection = null;
     }