diff --git a/UPGRADE.md b/UPGRADE.md
index dab5b16032b..5396a313e35 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -8,6 +8,13 @@ awareness about deprecated code.
 
 # Upgrade to 3.4
 
+# Deprecated `Type::getName()`
+
+This will method is not useful for the DBAL anymore, and will be removed in 4.0.
+As a consequence, depending on the name of a type being `json` for `jsonb` to
+be used for the Postgres platform is deprecated in favor of extending
+`Doctrine\DBAL\Types\JsonType`.
+
 # Deprecated `AbstractPlatform::getColumnComment()` and `AbstractPlatform::getDoctrineTypeComment()`
 
 DBAL no longer needs column comments to ensure proper diffing. Note that both
diff --git a/psalm.xml.dist b/psalm.xml.dist
index e9c0cf2bf18..a3b83f1c29c 100644
--- a/psalm.xml.dist
+++ b/psalm.xml.dist
@@ -229,6 +229,11 @@
                     See https://github.com/doctrine/dbal/pull/5204
                 -->
                 <referencedMethod name="Doctrine\DBAL\Platforms\AbstractPlatform::getColumnComment"/>
+                <!--
+                    TODO: remove in 4.0.0
+                    See https://github.com/doctrine/dbal/pull/5049
+                -->
+                <referencedMethod name="Doctrine\DBAL\Types\Type::getName"/>
             </errorLevel>
         </DeprecatedMethod>
         <DeprecatedProperty>
diff --git a/src/Schema/PostgreSQLSchemaManager.php b/src/Schema/PostgreSQLSchemaManager.php
index 03239bde5c2..d722993efa5 100644
--- a/src/Schema/PostgreSQLSchemaManager.php
+++ b/src/Schema/PostgreSQLSchemaManager.php
@@ -4,6 +4,7 @@
 
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
+use Doctrine\DBAL\Types\JsonType;
 use Doctrine\DBAL\Types\Type;
 use Doctrine\DBAL\Types\Types;
 use Doctrine\Deprecations\Deprecation;
@@ -15,6 +16,7 @@
 use function array_shift;
 use function assert;
 use function explode;
+use function get_class;
 use function implode;
 use function in_array;
 use function preg_match;
@@ -530,6 +532,20 @@ protected function _getPortableTableColumnDefinition($tableColumn)
         }
 
         if ($column->getType()->getName() === Types::JSON) {
+            if (! $column->getType() instanceof JsonType) {
+                Deprecation::trigger(
+                    'doctrine/dbal',
+                    'https://github.com/doctrine/dbal/pull/5049',
+                    <<<'DEPRECATION'
+                    %s not extending %s while being named %s is deprecated,
+                    and will lead to jsonb never to being used in 4.0.,
+                    DEPRECATION,
+                    get_class($column->getType()),
+                    JsonType::class,
+                    Types::JSON
+                );
+            }
+
             $column->setPlatformOption('jsonb', $jsonb);
         }
 
diff --git a/src/Types/Type.php b/src/Types/Type.php
index c2ae2be5ad4..f9fc6d0827e 100644
--- a/src/Types/Type.php
+++ b/src/Types/Type.php
@@ -102,9 +102,9 @@ abstract public function getSQLDeclaration(array $column, AbstractPlatform $plat
     /**
      * Gets the name of this type.
      *
-     * @return string
+     * @deprecated this method will be removed in Doctrine DBAL 4.0.
      *
-     * @todo Needed?
+     * @return string
      */
     abstract public function getName();
 
diff --git a/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php b/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
index a7bcf31f139..5d1afd6dbac 100644
--- a/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
+++ b/tests/Functional/Schema/PostgreSQLSchemaManagerTest.php
@@ -16,6 +16,7 @@
 use Doctrine\DBAL\Types\DecimalType;
 use Doctrine\DBAL\Types\Type;
 use Doctrine\DBAL\Types\Types;
+use Doctrine\Deprecations\PHPUnit\VerifyDeprecations;
 
 use function array_map;
 use function array_merge;
@@ -28,6 +29,8 @@
 
 class PostgreSQLSchemaManagerTest extends SchemaManagerFunctionalTestCase
 {
+    use VerifyDeprecations;
+
     protected function supportsPlatform(AbstractPlatform $platform): bool
     {
         return $platform instanceof PostgreSQLPlatform;
@@ -422,6 +425,38 @@ public function testJsonbColumn(): void
         self::assertTrue(true, $columns['foo']->getPlatformOption('jsonb'));
     }
 
+    public function testItTriggersADeprecationWhenAttemptingToUseJsonbWithATypeNotExtendingJsonType(): void
+    {
+        $backedUpType = Type::getType('json');
+        try {
+            Type::getTypeRegistry()->override(Types::JSON, new class extends Type {
+                /**
+                 * {@inheritdoc}
+                 */
+                public function getSQLDeclaration(array $column, AbstractPlatform $platform): string
+                {
+                    return $platform->getJsonTypeDeclarationSQL($column);
+                }
+
+                public function getName(): string
+                {
+                    return 'json';
+                }
+            });
+            $table = new Table('test_jsonb');
+            $table->addColumn('foo', Types::JSON)->setPlatformOption('jsonb', true);
+            $this->dropAndCreateTable($table);
+
+            $this->expectDeprecationWithIdentifier('https://github.com/doctrine/dbal/pull/5049');
+            $columns = $this->schemaManager->listTableColumns('test_jsonb');
+
+            self::assertSame(Types::JSON, $columns['foo']->getType()->getName());
+            self::assertTrue(true, $columns['foo']->getPlatformOption('jsonb'));
+        } finally {
+            Type::getTypeRegistry()->override(Types::JSON, $backedUpType);
+        }
+    }
+
     public function testListNegativeColumnDefaultValue(): void
     {
         $table = new Table('test_default_negative');