diff --git a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
index 7e05af1b1e5..30799fd4e33 100644
--- a/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
+++ b/lib/Doctrine/DBAL/Platforms/OraclePlatform.php
@@ -1166,14 +1166,4 @@ public function getBlobTypeDeclarationSQL(array $field)
     {
         return 'BLOB';
     }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function quoteStringLiteral($str)
-    {
-        $str = str_replace('\\', '\\\\', $str); // Oracle requires backslashes to be escaped aswell.
-
-        return parent::quoteStringLiteral($str);
-    }
 }
diff --git a/lib/Doctrine/DBAL/Schema/OracleSchemaManager.php b/lib/Doctrine/DBAL/Schema/OracleSchemaManager.php
index 3b043788863..b3715f61a84 100644
--- a/lib/Doctrine/DBAL/Schema/OracleSchemaManager.php
+++ b/lib/Doctrine/DBAL/Schema/OracleSchemaManager.php
@@ -153,8 +153,12 @@ protected function _getPortableTableColumnDefinition($tableColumn)
         }
 
         if (null !== $tableColumn['data_default']) {
-            // Default values returned from database are enclosed in single quotes.
-            $tableColumn['data_default'] = trim($tableColumn['data_default'], "'");
+            // Default values returned from database are represented as literal expressions
+            $tableColumn['data_default'] = str_replace(
+                "''",
+                "'",
+                preg_replace('/^\'(.*)\'$/s', '$1', $tableColumn['data_default'])
+            );
         }
 
         $precision = null;
diff --git a/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php b/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
index f4b54dd85cd..54715a93e55 100644
--- a/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
+++ b/tests/Doctrine/Tests/DBAL/Functional/Schema/SchemaManagerFunctionalTestCase.php
@@ -1410,19 +1410,20 @@ public function testCreateAndListSequences() : void
     private function getEscapedLiterals() : array
     {
         return [
-            ['An ASCII NUL (X\'00\')', "foo\\0bar"],
-            ['Single quote, C-style', "foo\\'bar"],
+            ['An ASCII NUL (X\'00\')', "foo\0bar"],
+            ['Single quote, C-style', "foo'bar"],
             ['Single quote, doubled-style', "foo''bar"],
-            ['Double quote, C-style', 'foo\\"bar'],
+            ['Double quote, C-style', 'foo"bar'],
             ['Double quote, double-style', 'foo""bar'],
-            ['Backspace', 'foo\\bbar'],
-            ['New-line', 'foo\\nbar'],
-            ['Carriage return', 'foo\\rbar'],
-            ['Tab', 'foo\\tbar'],
-            ['ASCII 26 (Control+Z)', 'foo\\Zbar'],
-            ['Backslash (\)', 'foo\\\\bar'],
-            ['Percent (%)', 'foo\\%bar'],
-            ['Underscore (_)', 'foo\\_bar'],
+            ['Backspace', "foo\x08bar"],
+            ['New-line', "foo\nbar"],
+            ['Carriage return', "foo\rbar"],
+            ['Tab', "foo\tbar"],
+            ['ASCII 26 (Control+Z)', "foo\x1abar"],
+            ['Backslash (\)', 'foo\\bar'],
+            ['Double backslash', 'foo\\\\bar'],
+            ['Percent (%)', 'foo%bar'],
+            ['Underscore (_)', 'foo_bar'],
         ];
     }
 
@@ -1452,9 +1453,10 @@ public function testEscapedDefaultValueCanBeInserted() : void
         $this->createTableForDefaultValues();
 
         $this->_conn->insert('string_escaped_default_value', ['def_foo' => 'foo']);
-        $row = $this->_conn->fetchAssoc('SELECT * FROM string_escaped_default_value');
+
         foreach ($this->getEscapedLiterals() as $i => $literal) {
-            self::assertSame($literal[1], $row['field' . $i], 'inserted default value should be the configured default value for: ' . $literal[0]);
+            $value = $this->_conn->fetchColumn('SELECT field' . $i . ' FROM string_escaped_default_value');
+            self::assertSame($literal[1], $value, 'inserted default value should be the configured default value for: ' . $literal[0]);
         }
     }
 }
diff --git a/tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php b/tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
index 7ebbea2d11f..2d3d9558e01 100644
--- a/tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
+++ b/tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
@@ -832,7 +832,7 @@ protected function getGeneratesAlterTableRenameIndexUsedByForeignKeySQL()
      */
     public function testQuotesDatabaseNameInListSequencesSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListSequencesSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListSequencesSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -840,7 +840,7 @@ public function testQuotesDatabaseNameInListSequencesSQL()
      */
     public function testQuotesTableNameInListTableIndexesSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListTableIndexesSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -848,7 +848,7 @@ public function testQuotesTableNameInListTableIndexesSQL()
      */
     public function testQuotesTableNameInListTableForeignKeysSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListTableForeignKeysSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -856,7 +856,7 @@ public function testQuotesTableNameInListTableForeignKeysSQL()
      */
     public function testQuotesTableNameInListTableConstraintsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListTableConstraintsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -864,7 +864,7 @@ public function testQuotesTableNameInListTableConstraintsSQL()
      */
     public function testQuotesTableNameInListTableColumnsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListTableColumnsSQL("Foo'Bar\\"), '', true);
     }
 
     /**
@@ -872,6 +872,6 @@ public function testQuotesTableNameInListTableColumnsSQL()
      */
     public function testQuotesDatabaseNameInListTableColumnsSQL()
     {
-        self::assertContains("'Foo''Bar\\\\'", $this->_platform->getListTableColumnsSQL('foo_table', "Foo'Bar\\"), '', true);
+        self::assertContains("'Foo''Bar\\'", $this->_platform->getListTableColumnsSQL('foo_table', "Foo'Bar\\"), '', true);
     }
 }