diff --git a/.phpactor.json b/.phpactor.json
new file mode 100644
index 0000000..012dd58
--- /dev/null
+++ b/.phpactor.json
@@ -0,0 +1,5 @@
+{
+    "$schema": "/Users/t.siebers/.local/share/nvim/mason/packages/phpactor/phpactor.schema.json",
+    "language_server_phpstan.enabled": true,
+    "language_server_php_cs_fixer.enabled": true
+}
\ No newline at end of file
diff --git a/Taskfile.yaml b/Taskfile.yaml
index b535ce2..89f3ddc 100644
--- a/Taskfile.yaml
+++ b/Taskfile.yaml
@@ -2,9 +2,6 @@
 
 version: '3'
 
-vars:
-  PHP_IMAGE: php:8.1
-
 tasks:
   default:
     cmds:
diff --git a/src/Solution.php b/src/Solution.php
index 08c32ca..a3c0c63 100644
--- a/src/Solution.php
+++ b/src/Solution.php
@@ -29,6 +29,7 @@ abstract class Solution
     /**
      * @var array<array<int, string>|null> The example data to use.
      */
+    #[ArrayShape(['part1' => 'array|null', 'part2' => 'array|null', 'global' => 'array|null'])]
     public array $exampleData = [
         'global' => null,
         'part1' => null,
@@ -102,7 +103,7 @@ abstract class Solution
 
     public function hasExampleData(): bool
     {
-        return $this->exampleData !== [];
+        return $this->exampleData['global'] !== [];
     }
 
     /**