diff --git a/tests/Twig/Runtime/IconRuntimeTest.php b/tests/Twig/Runtime/IconRuntimeTest.php
index b224641..53f00ed 100644
--- a/tests/Twig/Runtime/IconRuntimeTest.php
+++ b/tests/Twig/Runtime/IconRuntimeTest.php
@@ -251,8 +251,10 @@ class IconRuntimeTest extends TestCase
 
     public function testStrokeCurrentColorInstancesAreRemoved(): void
     {
-        $needle = 'stroke="currentColor"';
+        $needleA = 'stroke="currentColor"';
+        $needleB = 'stroke=\'currentColor\'';
         $contents = $this->icon->renderIcon(['icon' => self::ICON]);
-        $this->assertStringNotContainsString($needle, $contents);
+        $this->assertStringNotContainsString($needleA, $contents);
+        $this->assertStringNotContainsString($needleB, $contents);
     }
 }