diff --git a/app/Plan/PlanRepository.php b/app/Plan/PlanRepository.php
index 6f10b5c..a962c0f 100644
--- a/app/Plan/PlanRepository.php
+++ b/app/Plan/PlanRepository.php
@@ -5,4 +5,5 @@ namespace App\Plan;
 interface PlanRepository
 {
     public function create(CreatePlanDto $dto): Plan;
+    public function find(int $id): ?Plan;
 }
diff --git a/tests/Fakes/FakePlanRepository.php b/tests/Fakes/FakePlanRepository.php
index 0e54ff3..45e2e85 100644
--- a/tests/Fakes/FakePlanRepository.php
+++ b/tests/Fakes/FakePlanRepository.php
@@ -27,4 +27,14 @@ class FakePlanRepository implements PlanRepository
     {
         return count($this->existingPlans);
     }
+
+    public function find(int $id): ?Plan
+    {
+        return array_find(
+            $this->existingPlans,
+            function (Plan $plan) use ($id) {
+                return $plan->getId() === $id;
+            }
+        );
+    }
 }