diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 9550231..f503e8c 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         composer-flags: ["--prefer-stable", "--prefer-lowest"]
-        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2', '8.4']
         exclude:
           - {php-versions: '8.1', composer-flags: "--prefer-lowest"}
           - {php-versions: '8.2', composer-flags: "--prefer-lowest"}
diff --git a/tests/BacktraceFactoryTest.php b/tests/BacktraceFactoryTest.php
index 180a472..b1787bb 100644
--- a/tests/BacktraceFactoryTest.php
+++ b/tests/BacktraceFactoryTest.php
@@ -40,7 +40,12 @@ public function it_correctly_formats_annonymous_functions()
             $backtrace = (new BacktraceFactory($e, new Config))->trace();
         }
 
-        $this->assertEquals('Honeybadger\Tests\{closure}', $backtrace[0]['method']);
+        // if php version is 8.4.0 or higher, then we need to check for a more specific closure name
+        if (version_compare(PHP_VERSION, '8.4.0', '>=')) {
+            $this->assertEquals('{closure:Honeybadger\Tests\BacktraceFactoryTest::it_correctly_formats_annonymous_functions():33}', $backtrace[0]['method']);
+        } else {
+            $this->assertEquals('Honeybadger\Tests\{closure}', $backtrace[0]['method']);
+        }
         $this->assertEquals(['bar'], $backtrace[0]['args']);
     }
 
@@ -153,7 +158,12 @@ public function args_with_object_should_be_literals()
             $backtrace = (new BacktraceFactory($e, new Config))->trace();
         }
 
-        $this->assertEquals('Honeybadger\Tests\{closure}', $backtrace[0]['method']);
+        // if php version is 8.4.0 or higher, then we need to check for a more specific closure name
+        if (version_compare(PHP_VERSION, '8.4.0', '>=')) {
+            $this->assertEquals('{closure:Honeybadger\Tests\BacktraceFactoryTest::args_with_object_should_be_literals():151}', $backtrace[0]['method']);
+        } else {
+            $this->assertEquals('Honeybadger\Tests\{closure}', $backtrace[0]['method']);
+        }
         $this->assertEquals(['bar', '[LITERAL]Object('.TestClass::class.')'], $backtrace[0]['args']);
     }
 }