diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 843a734..326e8b8 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '8.3', '8.4', '8.5' ]
+        php: [ '8.3', '8.4', '8.5', '8.6' ]
         stability: [ prefer-stable ]
         libvips: [ '8.17.2', '8.18.6' ]
 
diff --git a/src/Modifiers/PixelateModifier.php b/src/Modifiers/PixelateModifier.php
index e8d6fb6..5d0ce26 100644
--- a/src/Modifiers/PixelateModifier.php
+++ b/src/Modifiers/PixelateModifier.php
@@ -45,7 +45,7 @@ private function pixelate(FrameInterface $frame): FrameInterface
     {
         $frame->setNative(
             $frame->native()
-                ->resize(1 / $this->size) // @phpstan-ignore missingType.checkedException
+                ->resize(1 / $this->size)
                 ->resize($this->size, ['kernel' => Kernel::NEAREST])
                 ->embed(0, 0, $frame->size()->width(), $frame->size()->height(), ['extend' => Extend::COPY]),
         );