diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b460653..42fec7e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,6 +13,7 @@ jobs:
           - ubuntu-20.04
           - windows-2019
         php:
+          - 8.0
           - 7.4
           - 7.3
           - 7.2
diff --git a/README.md b/README.md
index 3947014..6c92414 100644
--- a/README.md
+++ b/README.md
@@ -187,7 +187,7 @@ $ composer require clue/zlib-react:^1.0
 See also the [CHANGELOG](CHANGELOG.md) for details about version upgrades.
 
 This project aims to run on any platform and thus does not require any PHP
-extensions besides `ext-zlib` and supports running on current PHP 7+.
+extensions besides `ext-zlib` and supports running on PHP 7 through current PHP 8+.
 
 The `ext-zlib` extension is required for handling the underlying data compression
 and decompression.
diff --git a/tests/CompressorTest.php b/tests/CompressorTest.php
index e33fefd..926c3c4 100644
--- a/tests/CompressorTest.php
+++ b/tests/CompressorTest.php
@@ -8,7 +8,7 @@ class CompressorTest extends TestCase
 {
     public function testCtorThrowsForInvalidEncoding()
     {
-        $this->expectException('InvalidArgumentException');
+        $this->expectException(PHP_VERSION_ID >= 80000 ? \ValueError::class : \InvalidArgumentException::class);
         new Compressor(0);
     }
 }
diff --git a/tests/DecompressorTest.php b/tests/DecompressorTest.php
index dd3a2ab..e438692 100644
--- a/tests/DecompressorTest.php
+++ b/tests/DecompressorTest.php
@@ -8,7 +8,7 @@ class DecompressorTest extends TestCase
 {
     public function testCtorThrowsForInvalidEncoding()
     {
-        $this->expectException('InvalidArgumentException');
+        $this->expectException(PHP_VERSION_ID >= 80000 ? \ValueError::class : \InvalidArgumentException::class);
         new Decompressor(0);
     }
 }