diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 79402d1..0755978 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,16 +8,35 @@ on:
 
 jobs:
   tests:
-    uses: zenstruck/.github/.github/workflows/php-test.yml@main
+    name: PHP ${{ matrix.php }}, ${{ matrix.deps }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [8.3, 8.4, 8.5]
+        deps: [highest]
+        include:
+          - php: 8.3
+            deps: lowest
+    steps:
+      - uses: zenstruck/.github/actions/php-test-symfony@main
+        with:
+          php: ${{ matrix.php }}
+          deps: ${{ matrix.deps }}
 
   code-coverage:
     uses: zenstruck/.github/.github/workflows/php-coverage-codecov.yml@main
+    with:
+      php: 8.3
 
   composer-validate:
     uses: zenstruck/.github/.github/workflows/php-composer-validate.yml@main
+    with:
+      php: 8.3
 
   sca:
     uses: zenstruck/.github/.github/workflows/php-stan.yml@main
+    with:
+      php: 8.3
 
   fixcs:
     name: Run php-cs-fixer
diff --git a/composer.json b/composer.json
index f3809c5..251b793 100644
--- a/composer.json
+++ b/composer.json
@@ -12,8 +12,7 @@
         }
     ],
     "require": {
-        "php": ">=8.0",
-        "symfony/polyfill-php81": "^1.26",
+        "php": ">=8.3",
         "zenstruck/temp-file": "^1.0"
     },
     "require-dev": {
diff --git a/tests/ImageFileInfoTest.php b/tests/ImageFileInfoTest.php
index 110270b..ced65bf 100644
--- a/tests/ImageFileInfoTest.php
+++ b/tests/ImageFileInfoTest.php
@@ -19,6 +19,8 @@
  */
 final class ImageFileInfoTest extends TestCase
 {
+    use TempDirAssertions;
+
     /**
      * @test
      * @dataProvider imageMetadataProvider
@@ -28,13 +30,13 @@ public function can_get_metadata(string $file, int $height, int $width, string $
         $this->metadataAssertions(ImageFileInfo::wrap($file), $height, $width, $mime, $extension);
 
         $this->metadataAssertions($image = ImageFileInfo::from(\file_get_contents($file)), $height, $width, $mime, $extension);
-        $this->assertSame('/tmp', \dirname($image));
+        $this->assertInTempDir($image);
 
         $this->metadataAssertions($image = ImageFileInfo::from(\fopen($file, 'r')), $height, $width, $mime, $extension);
-        $this->assertSame('/tmp', \dirname($image));
+        $this->assertInTempDir($image);
 
         $this->metadataAssertions($image = ImageFileInfo::from(new \SplFileInfo($file)), $height, $width, $mime, $extension);
-        $this->assertSame('/tmp', \dirname($image));
+        $this->assertInTempDir($image);
     }
 
     public static function imageMetadataProvider(): iterable
diff --git a/tests/TempDirAssertions.php b/tests/TempDirAssertions.php
new file mode 100644
index 0000000..97db8eb
--- /dev/null
+++ b/tests/TempDirAssertions.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the zenstruck/image package.
+ *
+ * (c) Kevin Bond <kevinbond@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Zenstruck\Image\Tests;
+
+/**
+ * @author Kevin Bond <kevinbond@gmail.com>
+ */
+trait TempDirAssertions
+{
+    /**
+     * macOS reports its temp directory unresolved but creates files in the
+     * resolved one, so both sides have to be normalized before comparing.
+     */
+    protected function assertInTempDir(\SplFileInfo $file): void
+    {
+        $this->assertSame(\realpath(\sys_get_temp_dir()), \realpath(\dirname($file)));
+    }
+}
diff --git a/tests/Transformer/FilterObjectTransformerTestCase.php b/tests/Transformer/FilterObjectTransformerTestCase.php
index 3cdcbb2..09f6619 100644
--- a/tests/Transformer/FilterObjectTransformerTestCase.php
+++ b/tests/Transformer/FilterObjectTransformerTestCase.php
@@ -32,14 +32,14 @@ public function can_transform_into_temp_image_with_filter_object(): void
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('jpg', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
 
         $resized = $image->transform($this->filterObject(), ['format' => 'png']);
 
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('png', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
     }
 
     /**
diff --git a/tests/TransformerTestCase.php b/tests/TransformerTestCase.php
index a93bf47..4fda899 100644
--- a/tests/TransformerTestCase.php
+++ b/tests/TransformerTestCase.php
@@ -20,6 +20,8 @@
  */
 abstract class TransformerTestCase extends TestCase
 {
+    use TempDirAssertions;
+
     /**
      * @test
      */
@@ -32,14 +34,14 @@ public function can_transform_into_temp_image(): void
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('jpg', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
 
         $resized = $image->transform($this->filterCallback(), ['format' => 'png']);
 
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('png', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
     }
 
     /**
@@ -90,14 +92,14 @@ public function can_transform_into_temp_image_with_invokable_object(): void
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('jpg', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
 
         $resized = $image->transform($this->filterCallback(), ['format' => 'png']);
 
         $this->assertSame(100, $resized->dimensions()->width());
         $this->assertSame(120, $resized->dimensions()->height());
         $this->assertSame('png', $resized->getExtension());
-        $this->assertSame('/tmp', \dirname($resized));
+        $this->assertInTempDir($resized);
     }
 
     /**