diff --git a/tests/Functional/Schema/SchemaManagerTest.php b/tests/Functional/Schema/SchemaManagerTest.php
index f665733135..21b458b764 100644
--- a/tests/Functional/Schema/SchemaManagerTest.php
+++ b/tests/Functional/Schema/SchemaManagerTest.php
@@ -266,4 +266,72 @@ public function testIntrospectTableWithDotInName(): void
 
         self::assertCount(1, $table->getColumns());
     }
+
+    public function testIntrospectTableWithDotInIndexNames(): void
+    {
+        $table = Table::editor()
+            ->setUnquotedName('test_user')
+            ->setColumns(
+                Column::editor()
+                    ->setUnquotedName('id')
+                    ->setTypeName(Types::INTEGER)
+                    ->create(),
+            )
+            ->setPrimaryKeyConstraint(
+                PrimaryKeyConstraint::editor()
+                    ->setUnquotedColumnNames('id')
+                    ->create(),
+            )
+            ->create();
+
+        $this->dropAndCreateTable($table);
+
+        $tableTo = Table::editor()
+            ->setUnquotedName('example')
+            ->setColumns(
+                Column::editor()
+                    ->setUnquotedName('id')
+                    ->setTypeName(Types::INTEGER)
+                    ->create(),
+                Column::editor()
+                    ->setUnquotedName('user_id')
+                    ->setTypeName(Types::INTEGER)
+                    ->create(),
+            )
+            ->setPrimaryKeyConstraint(
+                PrimaryKeyConstraint::editor()
+                    ->setUnquotedColumnNames('id')
+                    ->create(),
+            )
+            ->setForeignKeyConstraints(
+                ForeignKeyConstraint::editor()
+                    ->setUnquotedReferencingColumnNames('user_id')
+                    ->setUnquotedReferencedTableName('test_user')
+                    ->setUnquotedReferencedColumnNames('id')
+                    ->setUnquotedName('fk.example.user_id')
+                    ->create(),
+            )
+            ->setIndexes(
+                Index::editor()
+                    ->setUnquotedName('idx.example.id')
+                    ->setUnquotedColumnNames('id', 'user_id')
+                    ->create(),
+            )
+            ->create();
+        $this->dropAndCreateTable($tableTo);
+
+        $table = $this->schemaManager->introspectTableByUnquotedName('example');
+
+        self::assertCount(2, $table->getColumns());
+
+        self::assertUnqualifiedNameEquals(
+            UnqualifiedName::unquoted('fk.example.user_id'),
+            $table->getForeignKey('"fk.example.user_id"')->getObjectName(),
+        );
+
+        self::assertUnqualifiedNameEquals(
+            UnqualifiedName::unquoted('idx.example.id'),
+            $table->getIndex('"idx.example.id"')->getObjectName(),
+        );
+    }
 }
diff --git a/tests/FunctionalTestCase.php b/tests/FunctionalTestCase.php
index 51aff97921..1c88606c0c 100644
--- a/tests/FunctionalTestCase.php
+++ b/tests/FunctionalTestCase.php
@@ -218,8 +218,9 @@ protected function toQuotedOptionallyQualifiedName(OptionallyQualifiedName $name
     /** @throws Exception */
     protected function assertUnqualifiedNameEquals(
         UnqualifiedName $expected,
-        UnqualifiedName $actual,
+        ?UnqualifiedName $actual,
     ): void {
+        self::assertNotNull($actual);
         self::assertEquals(
             $this->toQuotedUnqualifiedName($expected),
             $this->toQuotedUnqualifiedName($actual),