diff --git a/tests/src/Functional/TwigTweakTest.php b/tests/src/Functional/TwigTweakTest.php
index a23fe6e..264bdb4 100644
--- a/tests/src/Functional/TwigTweakTest.php
+++ b/tests/src/Functional/TwigTweakTest.php
@@ -258,14 +258,14 @@ final class TwigTweakTest extends BrowserTestBase {
     $url = Url::fromUserInput('/node/1/edit', ['absolute' => TRUE]);
     $link = Link::fromTextAndUrl('Edit', $url)->toString();
     $xpath = '//div[@class = "tt-link"]';
-    self::assertEquals($link, trim($this->xpath($xpath)[0]->getHtml()));
+    self::assertEquals($link, $this->xpath($xpath)[0]->getHtml());
 
     // -- Link with HTML.
     $text = Markup::create('<b>Edit</b>');
     $url = Url::fromUserInput('/node/1/edit', ['absolute' => TRUE]);
     $link = Link::fromTextAndUrl($text, $url)->toString();
     $xpath = '//div[@class = "tt-link-html"]';
-    self::assertEquals($link, trim($this->xpath($xpath)[0]->getHtml()));
+    self::assertEquals($link, $this->xpath($xpath)[0]->getHtml());
 
     // -- Status messages.
     $xpath = '//div[@class = "tt-messages"]//div[contains(@class, "messages--status") and contains(., "Hello world!")]';
@@ -277,7 +277,7 @@ final class TwigTweakTest extends BrowserTestBase {
 
     // -- Protected link.
     $xpath = '//div[@class = "tt-link-access"]';
-    self::assertEquals('', trim($this->xpath($xpath)[0]->getHtml()));
+    self::assertSame('', $this->xpath($xpath)[0]->getHtml());
 
     // -- Token replacement.
     $xpath = '//div[@class = "tt-token-replace" and text() = "Site name: Drupal"]';
@@ -308,7 +308,7 @@ final class TwigTweakTest extends BrowserTestBase {
 
     // -- Text format.
     $xpath = '//div[@class = "tt-check-markup"]';
-    self::assertEquals('<b>bold</b> strong', trim($this->xpath($xpath)[0]->getHtml()));
+    self::assertSame('<b>bold</b> strong', $this->xpath($xpath)[0]->getHtml());
 
     // -- Format size.
     $xpath = '//div[@class = "tt-format-size"]';
diff --git a/tests/src/Kernel/EntityFormViewBuilderTest.php b/tests/src/Kernel/EntityFormViewBuilderTest.php
index 1df47bb..c088867 100644
--- a/tests/src/Kernel/EntityFormViewBuilderTest.php
+++ b/tests/src/Kernel/EntityFormViewBuilderTest.php
@@ -80,7 +80,7 @@ final class EntityFormViewBuilderTest extends KernelTestBase {
       'max-age' => 50,
     ];
     self::assertSame($expected_cache, $build['#cache']);
-    self::assertContains('<form class="node-article-form node-form" ', $this->renderPlain($build));
+    self::assertStringContainsString('<form class="node-article-form node-form" ', $this->renderPlain($build));
 
     // -- Private node with access check.
     $build = $view_builder->build($private_node);
@@ -115,7 +115,7 @@ final class EntityFormViewBuilderTest extends KernelTestBase {
       'max-age' => Cache::PERMANENT,
     ];
     self::assertSame($expected_cache, $build['#cache']);
-    self::assertContains('<form class="node-article-form node-form" ', $this->renderPlain($build));
+    self::assertStringContainsString('<form class="node-article-form node-form" ', $this->renderPlain($build));
   }
 
   /**