diff --git a/Makefile b/Makefile
index bc88d40..126fb89 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,7 @@ approve: ## Generate code and approve it as expected
 .PHONY: test-examples
 test-examples: ## Test examples
 	cd examples/custom-types && ./test.sh
+	cd examples/inline-fragments && ./test.sh
 	cd examples/input && ./test.sh
 	cd examples/install && ./test.sh
 	cd examples/php-keywords && ./test.sh
diff --git a/examples/inline-fragments/.gitignore b/examples/inline-fragments/.gitignore
new file mode 100644
index 0000000..0351644
--- /dev/null
+++ b/examples/inline-fragments/.gitignore
@@ -0,0 +1,4 @@
+/sailor
+/vendor
+/composer.lock
+/generated
diff --git a/examples/inline-fragments/composer.json b/examples/inline-fragments/composer.json
new file mode 100644
index 0000000..23cefe8
--- /dev/null
+++ b/examples/inline-fragments/composer.json
@@ -0,0 +1,24 @@
+{
+  "require": {
+    "spawnia/sailor": "@dev"
+  },
+  "autoload": {
+    "psr-4": {
+      "Spawnia\\Sailor\\InlineFragments\\": "generated/"
+    }
+  },
+  "repositories": [
+    {
+      "type": "path",
+      "url": "./sailor",
+      "options": {
+        "symlink": false
+      }
+    }
+  ],
+  "scripts": {
+    "move-package": "rsync --recursive ../../ sailor --exclude examples --exclude vendor --exclude .idea --exclude .git --exclude .build --delete",
+    "pre-install-cmd": "@move-package",
+    "pre-update-cmd": "@move-package"
+  }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery.php b/examples/inline-fragments/expected/Operations/SearchQuery.php
new file mode 100644
index 0000000..1971cb3
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery.php
@@ -0,0 +1,65 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations;
+
+/**
+ * @extends \Spawnia\Sailor\Operation<\Spawnia\Sailor\InlineFragments\Operations\SearchQuery\SearchQueryResult>
+ */
+class SearchQuery extends \Spawnia\Sailor\Operation
+{
+    /**
+     * @param string $query
+     */
+    public static function execute($query): SearchQuery\SearchQueryResult
+    {
+        return self::executeOperation(
+            $query,
+        );
+    }
+
+    protected static function converters(): array
+    {
+        /** @var array<int, array{string, \Spawnia\Sailor\Convert\TypeConverter}>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            ['query', new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter)],
+        ];
+    }
+
+    public static function document(): string
+    {
+        return /* @lang GraphQL */ 'query SearchQuery($query: String!) {
+          __typename
+          search(query: $query) {
+            __typename
+            id
+            ... on Article {
+              title
+              content {
+                __typename
+                text
+              }
+            }
+            ... on Video {
+              title
+              content {
+                __typename
+                url
+                duration
+              }
+            }
+          }
+        }';
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/Search/Article.php b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Article.php
new file mode 100644
index 0000000..a0aa777
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Article.php
@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search;
+
+/**
+ * @property string $id
+ * @property string $title
+ * @property \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\ArticleContent $content
+ * @property string $__typename
+ */
+class Article extends \Spawnia\Sailor\ObjectLike
+{
+    /**
+     * @param string $id
+     * @param string $title
+     * @param \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\ArticleContent $content
+     */
+    public static function make($id, $title, $content): self
+    {
+        $instance = new self;
+
+        if ($id !== self::UNDEFINED) {
+            $instance->__set('id', $id);
+        }
+        if ($title !== self::UNDEFINED) {
+            $instance->__set('title', $title);
+        }
+        if ($content !== self::UNDEFINED) {
+            $instance->__set('content', $content);
+        }
+        $instance->__typename = 'Article';
+
+        return $instance;
+    }
+
+    protected function converters(): array
+    {
+        /** @var array<string, \Spawnia\Sailor\Convert\TypeConverter>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            'id' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\IDConverter),
+            'title' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+            'content' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\ArticleContent),
+            '__typename' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+        ];
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/ArticleContent.php b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/ArticleContent.php
new file mode 100644
index 0000000..a01910c
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/ArticleContent.php
@@ -0,0 +1,46 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content;
+
+/**
+ * @property string $text
+ * @property string $__typename
+ */
+class ArticleContent extends \Spawnia\Sailor\ObjectLike
+{
+    /**
+     * @param string $text
+     */
+    public static function make($text): self
+    {
+        $instance = new self;
+
+        if ($text !== self::UNDEFINED) {
+            $instance->__set('text', $text);
+        }
+        $instance->__typename = 'ArticleContent';
+
+        return $instance;
+    }
+
+    protected function converters(): array
+    {
+        /** @var array<string, \Spawnia\Sailor\Convert\TypeConverter>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            'text' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+            '__typename' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+        ];
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/VideoContent.php b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/VideoContent.php
new file mode 100644
index 0000000..5221f66
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Content/VideoContent.php
@@ -0,0 +1,52 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content;
+
+/**
+ * @property string $url
+ * @property int $duration
+ * @property string $__typename
+ */
+class VideoContent extends \Spawnia\Sailor\ObjectLike
+{
+    /**
+     * @param string $url
+     * @param int $duration
+     */
+    public static function make($url, $duration): self
+    {
+        $instance = new self;
+
+        if ($url !== self::UNDEFINED) {
+            $instance->__set('url', $url);
+        }
+        if ($duration !== self::UNDEFINED) {
+            $instance->__set('duration', $duration);
+        }
+        $instance->__typename = 'VideoContent';
+
+        return $instance;
+    }
+
+    protected function converters(): array
+    {
+        /** @var array<string, \Spawnia\Sailor\Convert\TypeConverter>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            'url' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+            'duration' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\IntConverter),
+            '__typename' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+        ];
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/Search/Video.php b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Video.php
new file mode 100644
index 0000000..89122f5
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/Search/Video.php
@@ -0,0 +1,58 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search;
+
+/**
+ * @property string $id
+ * @property string $title
+ * @property \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\VideoContent $content
+ * @property string $__typename
+ */
+class Video extends \Spawnia\Sailor\ObjectLike
+{
+    /**
+     * @param string $id
+     * @param string $title
+     * @param \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\VideoContent $content
+     */
+    public static function make($id, $title, $content): self
+    {
+        $instance = new self;
+
+        if ($id !== self::UNDEFINED) {
+            $instance->__set('id', $id);
+        }
+        if ($title !== self::UNDEFINED) {
+            $instance->__set('title', $title);
+        }
+        if ($content !== self::UNDEFINED) {
+            $instance->__set('content', $content);
+        }
+        $instance->__typename = 'Video';
+
+        return $instance;
+    }
+
+    protected function converters(): array
+    {
+        /** @var array<string, \Spawnia\Sailor\Convert\TypeConverter>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            'id' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\IDConverter),
+            'title' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+            'content' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Content\VideoContent),
+            '__typename' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+        ];
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/SearchQuery.php b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQuery.php
new file mode 100644
index 0000000..a1ec53d
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQuery.php
@@ -0,0 +1,49 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery;
+
+/**
+ * @property array<int, \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Article|\Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Video> $search
+ * @property string $__typename
+ */
+class SearchQuery extends \Spawnia\Sailor\ObjectLike
+{
+    /**
+     * @param array<int, \Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Article|\Spawnia\Sailor\InlineFragments\Operations\SearchQuery\Search\Video> $search
+     */
+    public static function make($search): self
+    {
+        $instance = new self;
+
+        if ($search !== self::UNDEFINED) {
+            $instance->__set('search', $search);
+        }
+        $instance->__typename = 'Query';
+
+        return $instance;
+    }
+
+    protected function converters(): array
+    {
+        /** @var array<string, \Spawnia\Sailor\Convert\TypeConverter>|null $converters */
+        static $converters;
+
+        return $converters ??= [
+            'search' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\ListConverter(new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\PolymorphicConverter([
+            'Article' => '\\Spawnia\\Sailor\\InlineFragments\\Operations\\SearchQuery\\Search\\Article',
+            'Video' => '\\Spawnia\\Sailor\\InlineFragments\\Operations\\SearchQuery\\Search\\Video',
+        ])))),
+            '__typename' => new \Spawnia\Sailor\Convert\NonNullConverter(new \Spawnia\Sailor\Convert\StringConverter),
+        ];
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryErrorFreeResult.php b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryErrorFreeResult.php
new file mode 100644
index 0000000..30df896
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryErrorFreeResult.php
@@ -0,0 +1,18 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery;
+
+class SearchQueryErrorFreeResult extends \Spawnia\Sailor\ErrorFreeResult
+{
+    public SearchQuery $data;
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryResult.php b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryResult.php
new file mode 100644
index 0000000..731df06
--- /dev/null
+++ b/examples/inline-fragments/expected/Operations/SearchQuery/SearchQueryResult.php
@@ -0,0 +1,41 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Operations\SearchQuery;
+
+class SearchQueryResult extends \Spawnia\Sailor\Result
+{
+    public ?SearchQuery $data = null;
+
+    protected function setData(\stdClass $data): void
+    {
+        $this->data = SearchQuery::fromStdClass($data);
+    }
+
+    /**
+     * Useful for instantiation of successful mocked results.
+     *
+     * @return static
+     */
+    public static function fromData(SearchQuery $data): self
+    {
+        $instance = new static;
+        $instance->data = $data;
+
+        return $instance;
+    }
+
+    public function errorFree(): SearchQueryErrorFreeResult
+    {
+        return SearchQueryErrorFreeResult::fromResult($this);
+    }
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Types/__DirectiveLocation.php b/examples/inline-fragments/expected/Types/__DirectiveLocation.php
new file mode 100644
index 0000000..7760888
--- /dev/null
+++ b/examples/inline-fragments/expected/Types/__DirectiveLocation.php
@@ -0,0 +1,36 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Types;
+
+class __DirectiveLocation
+{
+    public const QUERY = 'QUERY';
+    public const MUTATION = 'MUTATION';
+    public const SUBSCRIPTION = 'SUBSCRIPTION';
+    public const FIELD = 'FIELD';
+    public const FRAGMENT_DEFINITION = 'FRAGMENT_DEFINITION';
+    public const FRAGMENT_SPREAD = 'FRAGMENT_SPREAD';
+    public const INLINE_FRAGMENT = 'INLINE_FRAGMENT';
+    public const VARIABLE_DEFINITION = 'VARIABLE_DEFINITION';
+    public const SCHEMA = 'SCHEMA';
+    public const SCALAR = 'SCALAR';
+    public const OBJECT = 'OBJECT';
+    public const FIELD_DEFINITION = 'FIELD_DEFINITION';
+    public const ARGUMENT_DEFINITION = 'ARGUMENT_DEFINITION';
+    public const INTERFACE = 'INTERFACE';
+    public const UNION = 'UNION';
+    public const ENUM = 'ENUM';
+    public const ENUM_VALUE = 'ENUM_VALUE';
+    public const INPUT_OBJECT = 'INPUT_OBJECT';
+    public const INPUT_FIELD_DEFINITION = 'INPUT_FIELD_DEFINITION';
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/expected/Types/__TypeKind.php b/examples/inline-fragments/expected/Types/__TypeKind.php
new file mode 100644
index 0000000..68f36b2
--- /dev/null
+++ b/examples/inline-fragments/expected/Types/__TypeKind.php
@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace Spawnia\Sailor\InlineFragments\Types;
+
+class __TypeKind
+{
+    public const SCALAR = 'SCALAR';
+    public const OBJECT = 'OBJECT';
+    public const INTERFACE = 'INTERFACE';
+    public const UNION = 'UNION';
+    public const ENUM = 'ENUM';
+    public const INPUT_OBJECT = 'INPUT_OBJECT';
+    public const LIST = 'LIST';
+    public const NON_NULL = 'NON_NULL';
+
+    public static function endpoint(): string
+    {
+        return 'inline-fragments';
+    }
+
+    public static function config(): string
+    {
+        return \Safe\realpath(__DIR__ . '/../../sailor.php');
+    }
+}
diff --git a/examples/inline-fragments/sailor.php b/examples/inline-fragments/sailor.php
new file mode 100644
index 0000000..5adffe5
--- /dev/null
+++ b/examples/inline-fragments/sailor.php
@@ -0,0 +1,62 @@
+<?php declare(strict_types=1);
+
+use Spawnia\Sailor\Client;
+use Spawnia\Sailor\Codegen\DirectoryFinder;
+use Spawnia\Sailor\Codegen\Finder;
+use Spawnia\Sailor\EndpointConfig;
+use Spawnia\Sailor\Response;
+use Spawnia\Sailor\Testing\MockClient;
+
+return [
+    'inline-fragments' => new class() extends EndpointConfig {
+        public function namespace(): string
+        {
+            return 'Spawnia\Sailor\InlineFragments';
+        }
+
+        public function targetPath(): string
+        {
+            return __DIR__ . '/generated';
+        }
+
+        public function schemaPath(): string
+        {
+            return __DIR__ . '/schema.graphql';
+        }
+
+        public function finder(): Finder
+        {
+            return new DirectoryFinder(__DIR__ . '/src');
+        }
+
+        public function makeClient(): Client
+        {
+            return new MockClient(static fn(): Response => Response::fromStdClass((object) [
+                'data' => (object) [
+                    '__typename' => 'Query',
+                    'search' => [
+                        (object) [
+                            '__typename' => 'Article',
+                            'id' => '1',
+                            'title' => 'Test Article',
+                            'content' => (object) [
+                                '__typename' => 'ArticleContent',
+                                'text' => 'Article text',
+                            ],
+                        ],
+                        (object) [
+                            '__typename' => 'Video',
+                            'id' => '2',
+                            'title' => 'Test Video',
+                            'content' => (object) [
+                                '__typename' => 'VideoContent',
+                                'url' => 'https://example.com/video.mp4',
+                                'duration' => 120,
+                            ],
+                        ],
+                    ],
+                ],
+            ]));
+        }
+    },
+];
diff --git a/examples/inline-fragments/schema.graphql b/examples/inline-fragments/schema.graphql
new file mode 100644
index 0000000..b4c0eba
--- /dev/null
+++ b/examples/inline-fragments/schema.graphql
@@ -0,0 +1,28 @@
+type Query {
+    search(query: String!): [SearchResult!]!
+}
+
+interface SearchResult {
+    id: ID!
+}
+
+type Article implements SearchResult {
+    id: ID!
+    title: String!
+    content: ArticleContent!
+}
+
+type Video implements SearchResult {
+    id: ID!
+    title: String!
+    content: VideoContent!
+}
+
+type ArticleContent {
+    text: String!
+}
+
+type VideoContent {
+    url: String!
+    duration: Int!
+}
diff --git a/examples/inline-fragments/src/SearchQuery.graphql b/examples/inline-fragments/src/SearchQuery.graphql
new file mode 100644
index 0000000..8f68c86
--- /dev/null
+++ b/examples/inline-fragments/src/SearchQuery.graphql
@@ -0,0 +1,18 @@
+query SearchQuery($query: String!) {
+    search(query: $query) {
+        id
+        ... on Article {
+            title
+            content {
+                text
+            }
+        }
+        ... on Video {
+            title
+            content {
+                url
+                duration
+            }
+        }
+    }
+}
diff --git a/examples/inline-fragments/src/test.php b/examples/inline-fragments/src/test.php
new file mode 100644
index 0000000..78f2d1c
--- /dev/null
+++ b/examples/inline-fragments/src/test.php
@@ -0,0 +1,20 @@
+<?php declare(strict_types=1);
+
+use Spawnia\Sailor\InlineFragments\Operations\SearchQuery;
+
+require __DIR__ . '/../vendor/autoload.php';
+
+$result = SearchQuery::execute('test query')->errorFree();
+
+$article = $result->data->search[0];
+assert($article instanceof SearchQuery\Search\Article);
+assert($article->id === '1');
+assert($article->title === 'Test Article');
+assert($article->content->text === 'Article text');
+
+$video = $result->data->search[1];
+assert($video instanceof SearchQuery\Search\Video);
+assert($video->id === '2');
+assert($video->title === 'Test Video');
+assert($video->content->url === 'https://example.com/video.mp4');
+assert($video->content->duration === 120);
diff --git a/examples/inline-fragments/test.sh b/examples/inline-fragments/test.sh
new file mode 100755
index 0000000..6d8d226
--- /dev/null
+++ b/examples/inline-fragments/test.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euxo pipefail
+
+composer update
+composer reinstall spawnia/sailor
+vendor/bin/sailor
+
+php src/test.php
diff --git a/src/Codegen/OperationStack.php b/src/Codegen/OperationStack.php
index 3bd2e4f..ca738c0 100644
--- a/src/Codegen/OperationStack.php
+++ b/src/Codegen/OperationStack.php
@@ -23,8 +23,19 @@ public function __construct(OperationBuilder $operation)
     /** @param  array<string, ObjectLikeBuilder>  $selection */
     public function setSelection(string $namespace, array $selection): void
     {
-        // Ignore if already set, we already were in that subtree
-        $this->selections[$namespace] ??= $selection;
+        // Merge with existing selection to handle multiple inline fragments
+        // with the same field name but different types
+        if (!isset($this->selections[$namespace])) {
+            $this->selections[$namespace] = $selection;
+        } else {
+            // Only add new types, don't overwrite existing ones
+            // (we already processed that type's subtree)
+            foreach ($selection as $typeName => $builder) {
+                if (!isset($this->selections[$namespace][$typeName])) {
+                    $this->selections[$namespace][$typeName] = $builder;
+                }
+            }
+        }
     }
 
     /** @return iterable<ClassType> */
diff --git a/tests/Examples.php b/tests/Examples.php
index 89a3101..5519550 100644
--- a/tests/Examples.php
+++ b/tests/Examples.php
@@ -13,6 +13,7 @@ final class Examples
 
     public const EXAMPLES = [
         'custom-types',
+        'inline-fragments',
         'input',
         'php-keywords',
         'polymorphic',