diff --git a/spec/Gaufrette/Adapter/DoctrineDbalSpec.php b/spec/Gaufrette/Adapter/DoctrineDbalSpec.php
index 091ee157..24f1d309 100644
--- a/spec/Gaufrette/Adapter/DoctrineDbalSpec.php
+++ b/spec/Gaufrette/Adapter/DoctrineDbalSpec.php
@@ -6,7 +6,7 @@
 require_once 'functions.php';
 
 use Doctrine\DBAL\Connection;
-use Doctrine\DBAL\Driver\Statement;
+use Doctrine\DBAL\Result;
 use PhpSpec\ObjectBehavior;
 use Prophecy\Argument;
 
@@ -46,13 +46,18 @@ function it_checks_if_file_exists(Connection $connection)
                 return sprintf('"%s"', $argument[0]);
             });
 
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
-            ->fetchColumn('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(12);
         $this->exists('filename')->shouldReturn(true);
 
         $connection
-            ->fetchColumn('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(0);
         $this->exists('filename')->shouldReturn(false);
     }
@@ -67,8 +72,14 @@ function it_writes_to_new_file(Connection $connection)
             ->will(function ($argument) {
                 return sprintf('"%s"', $argument[0]);
             });
+
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
-            ->fetchColumn('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(false);
         $connection
             ->insert(
@@ -90,13 +101,18 @@ function it_writes_to_new_file(Connection $connection)
      */
     function it_write_file(Connection $connection)
     {
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
             ->quoteIdentifier(Argument::any())
             ->will(function ($argument) {
                 return sprintf('"%s"', $argument[0]);
             });
         $connection
-            ->fetchColumn('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT COUNT("key") FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(true);
         $connection
             ->update(
@@ -120,13 +136,18 @@ function it_write_file(Connection $connection)
      */
     function it_reads_file(Connection $connection)
     {
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
             ->quoteIdentifier(Argument::any())
             ->will(function ($argument) {
                 return sprintf('"%s"', $argument[0]);
             });
         $connection
-            ->fetchColumn('SELECT "content" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT "content" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn('some content');
 
         $this->read('filename')->shouldReturn('some content');
@@ -137,13 +158,18 @@ function it_reads_file(Connection $connection)
      */
     function it_calculates_checksum(Connection $connection)
     {
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
             ->quoteIdentifier(Argument::any())
             ->will(function ($argument) {
                 return sprintf('"%s"', $argument[0]);
             });
         $connection
-            ->fetchColumn('SELECT "checksum" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT "checksum" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(1234);
 
         $this->checksum('filename')->shouldReturn(1234);
@@ -154,13 +180,18 @@ function it_calculates_checksum(Connection $connection)
      */
     function it_gets_mtime(Connection $connection)
     {
+        $method = 'fetchOne'; // dbal 3.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
+        }
+
         $connection
             ->quoteIdentifier(Argument::any())
             ->will(function ($argument) {
                 return sprintf('"%s"', $argument[0]);
             });
         $connection
-            ->fetchColumn('SELECT "mtime" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
+            ->$method('SELECT "mtime" FROM "someTableName" WHERE "key" = :key', ['key' => 'filename'])
             ->willReturn(1234);
 
         $this->mtime('filename')->shouldReturn(1234);
@@ -194,11 +225,19 @@ function it_renames_file(Connection $connection)
 
     /**
      * @param \Doctrine\DBAL\Connection $connection
-     * @param \Doctrine\DBAL\Statement $stmt
      */
-    function it_get_keys(Connection $connection, Statement $stmt)
+    function it_get_keys(Connection $connection, $result)
     {
-        $stmt->fetchAll(\PDO::FETCH_COLUMN)->willReturn(['filename', 'filename1', 'filename2']);
+        if (class_exists(Result::class)) {
+            // dbal 3.x
+            $result->beADoubleOf(Result::class);
+            $result->fetchAllNumeric()->willReturn(['filename', 'filename1', 'filename2']);
+        } else {
+            // BC layer for dbal 2.x
+            $result->beADoubleOf(\Doctrine\DBAL\Statement::class);
+            $result->fetchAll(\PDO::FETCH_COLUMN)->willReturn(['filename', 'filename1', 'filename2']);
+        }
+
         $connection
             ->quoteIdentifier(Argument::any())
             ->will(function ($argument) {
@@ -206,7 +245,7 @@ function it_get_keys(Connection $connection, Statement $stmt)
             });
         $connection
             ->executeQuery('SELECT "key" FROM "someTableName"')
-            ->willReturn($stmt);
+            ->willReturn($result);
 
         $this->keys()->shouldReturn(['filename', 'filename1', 'filename2']);
     }
diff --git a/src/Gaufrette/Adapter/DoctrineDbal.php b/src/Gaufrette/Adapter/DoctrineDbal.php
index 1d725e3f..af3b4159 100644
--- a/src/Gaufrette/Adapter/DoctrineDbal.php
+++ b/src/Gaufrette/Adapter/DoctrineDbal.php
@@ -2,6 +2,7 @@
 
 namespace Gaufrette\Adapter;
 
+use Doctrine\DBAL\Result;
 use Gaufrette\Adapter;
 use Gaufrette\Util;
 use Doctrine\DBAL\Connection;
@@ -52,6 +53,12 @@ public function keys()
             $this->getQuotedTable()
         ));
 
+        if (class_exists(Result::class)) {
+            // dbal 3.x
+            return $stmt->fetchAllNumeric();
+        }
+
+        // BC layer for dbal 2.x
         return $stmt->fetchAll(\PDO::FETCH_COLUMN);
     }
 
@@ -89,8 +96,8 @@ public function checksum($key)
     public function exists($key)
     {
         $method = 'fetchOne'; // dbal 3.x
-        if (!method_exists($this->connection, $method)) {
-            $method = 'fetchColumn'; // dbal 2.x
+        if (!method_exists(Connection::class, $method)) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
         }
 
         return (boolean) $this->connection->$method(
@@ -159,8 +166,8 @@ public function isDirectory($key)
     private function getColumnValue($key, $column)
     {
         $method = 'fetchOne'; // dbal 3.x
-        if (!method_exists($this->connection, $method)) {
-            $method = 'fetchColumn'; // dbal 2.x
+        if (!method_exists(Connection::class, $method)) {
+            $method = 'fetchColumn'; // BC layer for dbal 2.x
         }
 
         $value = $this->connection->$method(
@@ -184,8 +191,8 @@ public function listKeys($prefix = '')
         $prefix = trim($prefix);
 
         $method = 'fetchAllAssociative'; // dbal 3.x
-        if (!method_exists($this->connection, 'fetchAllAssociative')) {
-            $method = 'fetchAll'; // dbal 2.x
+        if (!method_exists(Connection::class, 'fetchAllAssociative')) {
+            $method = 'fetchAll'; // BC layer for dbal 2.x
         }
 
         $keys = $this->connection->$method(