diff --git a/tests/Unit/MetadataResolver/CienResolverTest.php b/tests/Unit/MetadataResolver/CienResolverTest.php
index 2395dc0..f9cbe77 100644
--- a/tests/Unit/MetadataResolver/CienResolverTest.php
+++ b/tests/Unit/MetadataResolver/CienResolverTest.php
@@ -20,7 +20,7 @@ class CienResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Cien/test.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Cien/test.html');
 
         $this->createResolver(CienResolver::class, $responseText);
 
@@ -37,7 +37,7 @@ class CienResolverTest extends TestCase
 
     public function testWithNoTimestamp()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Cien/testWithNoTimestamp.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Cien/testWithNoTimestamp.html');
         $this->createResolver(CienResolver::class, $responseText);
 
         $this->expectException(\RuntimeException::class);
diff --git a/tests/Unit/MetadataResolver/DLsiteResolverTest.php b/tests/Unit/MetadataResolver/DLsiteResolverTest.php
index c698e07..21e0cbe 100644
--- a/tests/Unit/MetadataResolver/DLsiteResolverTest.php
+++ b/tests/Unit/MetadataResolver/DLsiteResolverTest.php
@@ -20,7 +20,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testHome()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -36,7 +36,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testSoft()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testSoft.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testSoft.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -52,7 +52,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testComic()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testComic.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testComic.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -68,7 +68,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testManiax()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testManiax.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testManiax.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -84,7 +84,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testPro()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testPro.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testPro.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -100,7 +100,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testBooks()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testBooks.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testBooks.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -116,7 +116,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testGirls()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testGirls.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testGirls.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -132,7 +132,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testGirlsPro()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testGirlsPro.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testGirlsPro.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -148,7 +148,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testBL()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testBL.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testBL.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -164,7 +164,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testEng()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testEng.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testEng.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -180,7 +180,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testEcchiEng()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testEcchiEng.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testEcchiEng.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -196,7 +196,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testSPLink()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
         // SP版（touch）のURLのテストだがリゾルバ側でURLから-touchを削除してPC版を取得するので、PC版の内容を使用する
 
         $this->createResolver(DLsiteResolver::class, $responseText);
@@ -213,7 +213,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testShortLink()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -229,7 +229,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testOldAffiliateLink()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -245,7 +245,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testSnsAffiliateLink()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -261,7 +261,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testAffiliateLink()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -277,7 +277,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testAffiliateUrl()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHome.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHome.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
@@ -303,7 +303,7 @@ class DLsiteResolverTest extends TestCase
 
     public function testHTMLdescription()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DLsite/testHTMLdescription.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DLsite/testHTMLdescription.html');
 
         $this->createResolver(DLsiteResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/DeviantArtResolverTest.php b/tests/Unit/MetadataResolver/DeviantArtResolverTest.php
index d85f6c5..8a2168a 100644
--- a/tests/Unit/MetadataResolver/DeviantArtResolverTest.php
+++ b/tests/Unit/MetadataResolver/DeviantArtResolverTest.php
@@ -20,7 +20,7 @@ class DeviantArtResolverTest extends TestCase
 
     public function testMature()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/DeviantArt/mature.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/DeviantArt/mature.json');
 
         $this->createResolver(DeviantArtResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/FC2ContentsResolverTest.php b/tests/Unit/MetadataResolver/FC2ContentsResolverTest.php
index 1056f85..347d189 100644
--- a/tests/Unit/MetadataResolver/FC2ContentsResolverTest.php
+++ b/tests/Unit/MetadataResolver/FC2ContentsResolverTest.php
@@ -20,7 +20,7 @@ class FC2ContentsResolverTest extends TestCase
 
     public function testAdult()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/FC2Contents/adult.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/FC2Contents/adult.html');
 
         $this->createResolver(FC2ContentsResolver::class, $responseText);
 
@@ -35,7 +35,7 @@ class FC2ContentsResolverTest extends TestCase
 
     public function testGeneral()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/FC2Contents/general.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/FC2Contents/general.html');
 
         $this->createResolver(FC2ContentsResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/FantiaResolverTest.php b/tests/Unit/MetadataResolver/FantiaResolverTest.php
index d607821..cdf6c7f 100644
--- a/tests/Unit/MetadataResolver/FantiaResolverTest.php
+++ b/tests/Unit/MetadataResolver/FantiaResolverTest.php
@@ -20,7 +20,7 @@ class FantiaResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Fantia/test.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Fantia/test.json');
 
         $this->createResolver(FantiaResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/FanzaResolverTest.php b/tests/Unit/MetadataResolver/FanzaResolverTest.php
index 9271676..1a65370 100644
--- a/tests/Unit/MetadataResolver/FanzaResolverTest.php
+++ b/tests/Unit/MetadataResolver/FanzaResolverTest.php
@@ -23,7 +23,7 @@ class FanzaResolverTest extends TestCase
      */
     public function test($filename, $url, $title, $description, $image, $tags)
     {
-        $responseText = file_get_contents(__DIR__ . "/../../fixture/Fanza/{$filename}");
+        $responseText = $this->fetchSnapshot(__DIR__ . "/../../fixture/Fanza/{$filename}");
 
         $this->createResolver(FanzaResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/HentaiFoundryResolverTest.php b/tests/Unit/MetadataResolver/HentaiFoundryResolverTest.php
index 31873a1..e96c730 100644
--- a/tests/Unit/MetadataResolver/HentaiFoundryResolverTest.php
+++ b/tests/Unit/MetadataResolver/HentaiFoundryResolverTest.php
@@ -20,7 +20,7 @@ class HentaiFoundryResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/HentaiFoundry/illust.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/HentaiFoundry/illust.html');
 
         $this->createResolver(HentaiFoundryResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/IwaraResolverTest.php b/tests/Unit/MetadataResolver/IwaraResolverTest.php
index f065bb5..dd6a053 100644
--- a/tests/Unit/MetadataResolver/IwaraResolverTest.php
+++ b/tests/Unit/MetadataResolver/IwaraResolverTest.php
@@ -20,7 +20,7 @@ class IwaraResolverTest extends TestCase
 
     public function testVideo()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Iwara/video.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Iwara/video.html');
 
         $this->createResolver(IwaraResolver::class, $responseText);
 
@@ -37,7 +37,7 @@ class IwaraResolverTest extends TestCase
 
     public function testYouTube()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Iwara/youtube.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Iwara/youtube.html');
 
         $this->createResolver(IwaraResolver::class, $responseText);
 
@@ -54,7 +54,7 @@ class IwaraResolverTest extends TestCase
 
     public function testImages()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Iwara/images.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Iwara/images.html');
 
         $this->createResolver(IwaraResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/Kb10uyShortStoryServerResolverTest.php b/tests/Unit/MetadataResolver/Kb10uyShortStoryServerResolverTest.php
index cd6127c..1c9ddfe 100644
--- a/tests/Unit/MetadataResolver/Kb10uyShortStoryServerResolverTest.php
+++ b/tests/Unit/MetadataResolver/Kb10uyShortStoryServerResolverTest.php
@@ -20,7 +20,7 @@ class Kb10uyShortStoryServerResolverTest extends TestCase
 
     public function testNormalPost()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Kb10uyShortStoryServer/tomone.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Kb10uyShortStoryServer/tomone.html');
 
         $this->createResolver(Kb10uyShortStoryServerResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/KomifloResolverTest.php b/tests/Unit/MetadataResolver/KomifloResolverTest.php
index 2850b9a..6318f91 100644
--- a/tests/Unit/MetadataResolver/KomifloResolverTest.php
+++ b/tests/Unit/MetadataResolver/KomifloResolverTest.php
@@ -20,7 +20,7 @@ class KomifloResolverTest extends TestCase
 
     public function testComic()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Komiflo/comic.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Komiflo/comic.json');
 
         $this->createResolver(KomifloResolver::class, $responseText);
 
@@ -36,7 +36,7 @@ class KomifloResolverTest extends TestCase
 
     public function testComicWithNoParents()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Komiflo/comicWithNoParents.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Komiflo/comicWithNoParents.json');
 
         $this->createResolver(KomifloResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/NicoSeigaResolverTest.php b/tests/Unit/MetadataResolver/NicoSeigaResolverTest.php
index 6df319b..f3abc9c 100644
--- a/tests/Unit/MetadataResolver/NicoSeigaResolverTest.php
+++ b/tests/Unit/MetadataResolver/NicoSeigaResolverTest.php
@@ -21,7 +21,7 @@ class NicoSeigaResolverTest extends TestCase
 
     public function testSeiga()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/NicoSeiga/seiga.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/NicoSeiga/seiga.html');
 
         $this->createResolver(NicoSeigaResolver::class, $responseText);
 
@@ -37,7 +37,7 @@ class NicoSeigaResolverTest extends TestCase
 
     public function testShunga()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/NicoSeiga/shunga.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/NicoSeiga/shunga.html');
 
         $this->createResolver(NicoSeigaResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/NijieResolverTest.php b/tests/Unit/MetadataResolver/NijieResolverTest.php
index 72ab264..c8d56da 100644
--- a/tests/Unit/MetadataResolver/NijieResolverTest.php
+++ b/tests/Unit/MetadataResolver/NijieResolverTest.php
@@ -20,7 +20,7 @@ class NijieResolverTest extends TestCase
 
     public function testStandardPicture()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -36,7 +36,7 @@ class NijieResolverTest extends TestCase
 
     public function testMultiplePicture()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testMultiplePictureResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testMultiplePictureResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -52,7 +52,7 @@ class NijieResolverTest extends TestCase
 
     public function testAnimationGif()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testAnimationGifResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testAnimationGifResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -68,7 +68,7 @@ class NijieResolverTest extends TestCase
 
     public function testMp4Movie()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testMp4MovieResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testMp4MovieResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -84,7 +84,7 @@ class NijieResolverTest extends TestCase
 
     public function testViewPopup()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -100,7 +100,7 @@ class NijieResolverTest extends TestCase
 
     public function testSp()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -116,7 +116,7 @@ class NijieResolverTest extends TestCase
 
     public function testSpViewPopup()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testStandardPictureResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
@@ -132,7 +132,7 @@ class NijieResolverTest extends TestCase
 
     public function testHasHtmlInAuthorProfile()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Nijie/testHasHtmlInAuthorProfileResponse.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Nijie/testHasHtmlInAuthorProfileResponse.html');
 
         $this->createResolver(NijieResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/PixivResolverTest.php b/tests/Unit/MetadataResolver/PixivResolverTest.php
index fb6278b..25395eb 100644
--- a/tests/Unit/MetadataResolver/PixivResolverTest.php
+++ b/tests/Unit/MetadataResolver/PixivResolverTest.php
@@ -20,7 +20,7 @@ class PixivResolverTest extends TestCase
 
     public function testIllust()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Pixiv/illust.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Pixiv/illust.json');
 
         $this->createResolver(PixivResolver::class, $responseText);
 
@@ -36,7 +36,7 @@ class PixivResolverTest extends TestCase
 
     public function testIllustMultiPages()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Pixiv/illustMultiPages.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Pixiv/illustMultiPages.json');
 
         $this->createResolver(PixivResolver::class, $responseText);
 
@@ -52,7 +52,7 @@ class PixivResolverTest extends TestCase
 
     public function testManga()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Pixiv/manga.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Pixiv/manga.json');
 
         $this->createResolver(PixivResolver::class, $responseText);
 
@@ -68,7 +68,7 @@ class PixivResolverTest extends TestCase
 
     public function testArtworkUrl()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Pixiv/illust.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Pixiv/illust.json');
 
         $this->createResolver(PixivResolver::class, $responseText);
 
@@ -84,7 +84,7 @@ class PixivResolverTest extends TestCase
 
     public function testArtworkUrlEn()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Pixiv/illust.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Pixiv/illust.json');
 
         $this->createResolver(PixivResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/PlurkResolverTest.php b/tests/Unit/MetadataResolver/PlurkResolverTest.php
index 8597db7..cded328 100644
--- a/tests/Unit/MetadataResolver/PlurkResolverTest.php
+++ b/tests/Unit/MetadataResolver/PlurkResolverTest.php
@@ -20,7 +20,7 @@ class PlurkResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Plurk/test.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Plurk/test.html');
 
         $this->createResolver(PlurkResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/SteamResolverTest.php b/tests/Unit/MetadataResolver/SteamResolverTest.php
index 2590357..16e17ba 100644
--- a/tests/Unit/MetadataResolver/SteamResolverTest.php
+++ b/tests/Unit/MetadataResolver/SteamResolverTest.php
@@ -20,7 +20,7 @@ class SteamResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Steam/test.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Steam/test.json');
 
         $this->createResolver(SteamResolver::class, $responseText);
 
@@ -32,7 +32,7 @@ class SteamResolverTest extends TestCase
 
     public function testR18()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Steam/testR18.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Steam/testR18.json');
 
         $this->createResolver(SteamResolver::class, $responseText);
 
@@ -46,7 +46,7 @@ class SteamResolverTest extends TestCase
     {
         $this->expectException(\RuntimeException::class);
 
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Steam/testNotFound.json');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Steam/testNotFound.json');
 
         $this->createResolver(SteamResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/ToranoanaResolverTest.php b/tests/Unit/MetadataResolver/ToranoanaResolverTest.php
index ccb5d2b..3ae01cc 100644
--- a/tests/Unit/MetadataResolver/ToranoanaResolverTest.php
+++ b/tests/Unit/MetadataResolver/ToranoanaResolverTest.php
@@ -20,7 +20,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testTora()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testTora.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testTora.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -35,7 +35,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testToraR()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testToraR.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testToraR.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -50,7 +50,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testToraD()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testToraD.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testToraD.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -65,7 +65,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testToraRD()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testToraRD.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testToraRD.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -80,7 +80,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testJoshi()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testJoshi.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testJoshi.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -95,7 +95,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testJoshiR()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testJoshiR.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testJoshiR.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -110,7 +110,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testJoshiD()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testJoshiD.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testJoshiD.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
@@ -125,7 +125,7 @@ class ToranoanaResolverTest extends TestCase
 
     public function testJoshiRD()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Toranoana/testJoshiRD.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Toranoana/testJoshiRD.html');
 
         $this->createResolver(ToranoanaResolver::class, $responseText);
 
diff --git a/tests/Unit/MetadataResolver/XtubeResolverTest.php b/tests/Unit/MetadataResolver/XtubeResolverTest.php
index 94c95d8..061f595 100644
--- a/tests/Unit/MetadataResolver/XtubeResolverTest.php
+++ b/tests/Unit/MetadataResolver/XtubeResolverTest.php
@@ -20,7 +20,7 @@ class XtubeResolverTest extends TestCase
 
     public function test()
     {
-        $responseText = file_get_contents(__DIR__ . '/../../fixture/Xtube/video.html');
+        $responseText = $this->fetchSnapshot(__DIR__ . '/../../fixture/Xtube/video.html');
 
         $this->createResolver(XtubeResolver::class, $responseText);