diff --git a/UPGRADE.md b/UPGRADE.md
index 3a6902fbfab..0a76550fea8 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -10,8 +10,9 @@ awareness about deprecated code.
 
 ## BC BREAK: removed `AbstractPlatform` methods.
 
-1. `getIdentitySequenceName()`,
-2. `usesSequenceEmulatedIdentityColumns()`.
+1. `getDefaultSchemaName()`,
+2. `getIdentitySequenceName()`,
+3. `usesSequenceEmulatedIdentityColumns()`.
 
 ## BC BREAK: removed support for the `NULL` value of schema asset filter.
 
diff --git a/psalm.xml.dist b/psalm.xml.dist
index 748d011ddcb..549eb873521 100644
--- a/psalm.xml.dist
+++ b/psalm.xml.dist
@@ -47,7 +47,6 @@
                 <!--
                     TODO: remove in 4.0.0
                 -->
-                <referencedMethod name="Doctrine\DBAL\Platforms\AbstractPlatform::getDefaultSchemaName"/>
                 <referencedMethod name="Doctrine\DBAL\Platforms\AbstractPlatform::supportsCreateDropDatabase"/>
                 <referencedMethod name="Doctrine\DBAL\Platforms\DB2Platform::supportsCreateDropDatabase"/>
             </errorLevel>
diff --git a/src/Platforms/AbstractPlatform.php b/src/Platforms/AbstractPlatform.php
index c77b635adea..0bb36f4b1df 100644
--- a/src/Platforms/AbstractPlatform.php
+++ b/src/Platforms/AbstractPlatform.php
@@ -2222,18 +2222,6 @@ public function supportsSchemas(): bool
         return false;
     }
 
-    /**
-     * Returns the default schema name.
-     *
-     * @deprecated
-     *
-     * @throws Exception If not supported on this platform.
-     */
-    public function getDefaultSchemaName(): string
-    {
-        throw NotSupported::new(__METHOD__);
-    }
-
     /**
      * Whether this platform supports create database.
      *
diff --git a/src/Platforms/PostgreSQLPlatform.php b/src/Platforms/PostgreSQLPlatform.php
index b6b964c873a..942542f755c 100644
--- a/src/Platforms/PostgreSQLPlatform.php
+++ b/src/Platforms/PostgreSQLPlatform.php
@@ -16,7 +16,6 @@
 use Doctrine\DBAL\Schema\TableDiff;
 use Doctrine\DBAL\Types\BinaryType;
 use Doctrine\DBAL\Types\BlobType;
-use Doctrine\Deprecations\Deprecation;
 use UnexpectedValueException;
 
 use function array_diff;
@@ -125,21 +124,6 @@ public function supportsSchemas(): bool
         return true;
     }
 
-    /**
-     * @deprecated
-     */
-    public function getDefaultSchemaName(): string
-    {
-        Deprecation::trigger(
-            'doctrine/dbal',
-            'https://github.com/doctrine/dbal/pull/5513',
-            '%s is deprecated.',
-            __METHOD__
-        );
-
-        return 'public';
-    }
-
     public function supportsIdentityColumns(): bool
     {
         return true;
diff --git a/src/Platforms/SQLServerPlatform.php b/src/Platforms/SQLServerPlatform.php
index f6dd6c5747e..e62d832b2ee 100644
--- a/src/Platforms/SQLServerPlatform.php
+++ b/src/Platforms/SQLServerPlatform.php
@@ -17,7 +17,6 @@
 use Doctrine\DBAL\Schema\Sequence;
 use Doctrine\DBAL\Schema\SQLServerSchemaManager;
 use Doctrine\DBAL\Schema\TableDiff;
-use Doctrine\Deprecations\Deprecation;
 use InvalidArgumentException;
 
 use function array_merge;
@@ -109,21 +108,6 @@ public function supportsSchemas(): bool
         return true;
     }
 
-    /**
-     * @deprecated
-     */
-    public function getDefaultSchemaName(): string
-    {
-        Deprecation::trigger(
-            'doctrine/dbal',
-            'https://github.com/doctrine/dbal/pull/5513',
-            '%s is deprecated.',
-            __METHOD__
-        );
-
-        return 'dbo';
-    }
-
     public function supportsColumnCollation(): bool
     {
         return true;
diff --git a/tests/Functional/Schema/SchemaManagerFunctionalTestCase.php b/tests/Functional/Schema/SchemaManagerFunctionalTestCase.php
index fa84613c888..f0870397807 100644
--- a/tests/Functional/Schema/SchemaManagerFunctionalTestCase.php
+++ b/tests/Functional/Schema/SchemaManagerFunctionalTestCase.php
@@ -10,7 +10,9 @@
 use Doctrine\DBAL\Exception\DatabaseObjectNotFoundException;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Platforms\OraclePlatform;
+use Doctrine\DBAL\Platforms\PostgreSQLPlatform;
 use Doctrine\DBAL\Platforms\SqlitePlatform;
+use Doctrine\DBAL\Platforms\SQLServerPlatform;
 use Doctrine\DBAL\Schema\AbstractAsset;
 use Doctrine\DBAL\Schema\AbstractSchemaManager;
 use Doctrine\DBAL\Schema\Column;
@@ -1055,13 +1057,18 @@ protected function assertVarBinaryColumnIsValid(Table $table, string $columnName
 
     public function testListTableDetailsWithFullQualifiedTableName(): void
     {
-        if (! $this->connection->getDatabasePlatform()->supportsSchemas()) {
+        $platform = $this->connection->getDatabasePlatform();
+
+        if ($platform instanceof PostgreSQLPlatform) {
+            $defaultSchemaName = 'public';
+        } elseif ($platform instanceof SQLServerPlatform) {
+            $defaultSchemaName = 'pdo';
+        } else {
             self::markTestSkipped('Test only works on platforms that support schemas.');
         }
 
-        $defaultSchemaName = $this->connection->getDatabasePlatform()->getDefaultSchemaName();
-        $primaryTableName  = 'primary_table';
-        $foreignTableName  = 'foreign_table';
+        $primaryTableName = 'primary_table';
+        $foreignTableName = 'foreign_table';
 
         $table = new Table($foreignTableName);
         $table->addColumn('id', 'integer', ['autoincrement' => true]);