diff --git a/app/Subactivity.php b/app/Subactivity.php
index 78aea4ec..37952f8e 100644
--- a/app/Subactivity.php
+++ b/app/Subactivity.php
@@ -14,15 +14,27 @@ class Subactivity extends Model
     use HasNamiField;
     use Sluggable;
 
+    /**
+     * @var array<int, string>
+     */
     public $fillable = ['is_age_group', 'is_filterable', 'slug', 'name', 'nami_id'];
 
+    /**
+     * @var bool
+     */
     public $timestamps = false;
 
+    /**
+     * @var array<string, string>
+     */
     public $casts = [
         'is_age_group' => 'boolean',
         'is_filterable' => 'boolean',
     ];
 
+    /**
+     * @return array<string, array{source: string}>
+     */
     public function sluggable(): array
     {
         return [
diff --git a/database/factories/SubactivityFactory.php b/database/factories/SubactivityFactory.php
index 5074d989..4cd12c58 100644
--- a/database/factories/SubactivityFactory.php
+++ b/database/factories/SubactivityFactory.php
@@ -34,7 +34,7 @@ class SubactivityFactory extends Factory
     /**
      * Define the model's default state.
      *
-     * @return array
+     * @return array<string, mixed>
      */
     public function definition()
     {
diff --git a/phpstan.neon b/phpstan.neon
index 87f3eeda..879129b8 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -163,11 +163,6 @@ parameters:
             count: 1
             path: app/Providers/AuthServiceProvider.php
 
-        -
-            message: "#^Method App\\\\Subactivity\\:\\:sluggable\\(\\) return type has no value type specified in iterable type array\\.$#"
-            count: 1
-            path: app/Subactivity.php
-
         -
             message: "#^Method Database\\\\Factories\\\\ActivityFactory\\:\\:definition\\(\\) return type has no value type specified in iterable type array\\.$#"
             count: 1
@@ -198,32 +193,12 @@ parameters:
             count: 1
             path: database/factories/Payment/StatusFactory.php
 
-        -
-            message: "#^Method Database\\\\Factories\\\\SubactivityFactory\\:\\:definition\\(\\) return type has no value type specified in iterable type array\\.$#"
-            count: 1
-            path: database/factories/SubactivityFactory.php
-
         -
             message: "#^Call to an undefined method Phake\\\\Proxies\\\\StubberProxy.*#"
 
         -
             message: "#^Call to an undefined method Phake\\\\Proxies\\\\VerifierProxy.*#"
 
-        -
-            message: "#^Method Tests\\\\Feature\\\\Member\\\\StoreTest\\:\\:attributes\\(\\) has parameter \\$overwrites with no value type specified in iterable type array\\.$#"
-            count: 1
-            path: tests/Feature/Member/StoreTest.php
-
-        -
-            message: "#^Method Tests\\\\Feature\\\\Member\\\\StoreTest\\:\\:attributes\\(\\) return type has no value type specified in iterable type array\\.$#"
-            count: 1
-            path: tests/Feature/Member/StoreTest.php
-
-        -
-            message: "#^Method Tests\\\\Feature\\\\Member\\\\StoreTest\\:\\:defaults\\(\\) return type has no value type specified in iterable type array\\.$#"
-            count: 1
-            path: tests/Feature/Member/StoreTest.php
-
         -
             message: "#^PHPDoc tag @param has invalid value \\(\\<class\\-string\\> \\$class\\)\\: Unexpected token \"\\<\", expected type at offset 18$#"
             count: 1
diff --git a/tests/Feature/Member/StoreTest.php b/tests/Feature/Member/StoreTest.php
index 17eb5194..485e8b33 100644
--- a/tests/Feature/Member/StoreTest.php
+++ b/tests/Feature/Member/StoreTest.php
@@ -211,6 +211,9 @@ class StoreTest extends TestCase
             ->assertSessionHasErrors(['subscription_id' => 'Beitragsart ist erforderlich.']);
     }
 
+    /**
+     * @return array<string, mixed>
+     */
     public function defaults(): array
     {
         $country = Country::factory()->create();
diff --git a/tests/Lib/MergesAttributes.php b/tests/Lib/MergesAttributes.php
index d36b9540..b9a3d490 100644
--- a/tests/Lib/MergesAttributes.php
+++ b/tests/Lib/MergesAttributes.php
@@ -4,8 +4,15 @@ namespace Tests\Lib;
 
 trait MergesAttributes
 {
-    abstract public function defaults();
+    /**
+     * @return array<string, mixed>
+     */
+    abstract public function defaults(): array;
 
+    /**
+     * @param array<string, mixed> $overwrites
+     * @return array<string, mixed>
+     */
     public function attributes(?array $overwrites = []): array
     {
         $defaults = collect($this->defaults());