diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a83b2cd..099615a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,6 +24,10 @@ jobs:
                     - '7.4'
                     - '8.0'
                     - '8.1'
+                    - '8.2'
+                    - '8.3'
+                    - '8.4'
+                    - '8.5'
 
         runs-on: ${{ matrix.os }}
 
diff --git a/tests/Internal/DummyFileSystemStream.php b/tests/Internal/DummyFileSystemStream.php
index 6cbacc9..6baf9c4 100644
--- a/tests/Internal/DummyFileSystemStream.php
+++ b/tests/Internal/DummyFileSystemStream.php
@@ -18,6 +18,9 @@
  */
 class DummyFileSystemStream
 {
+    /** @var resource|null */
+    public $context;
+
     /** @var resource */
     private $fp;