diff --git a/stubs/illuminate.support.collection.phpstub b/stubs/illuminate.support.collection.phpstub
index 6efda10..87beb6e 100644
--- a/stubs/illuminate.support.collection.phpstub
+++ b/stubs/illuminate.support.collection.phpstub
@@ -132,6 +132,17 @@ class Collection implements ArrayAccess, Enumerable
     {
     }
 
+    /**
+     * @template TCallbackReturn
+     *
+     * @param callable(TValue):TCallbackReturn $keyBy
+     *
+     * @return Collection<TCallbackReturn,TValue>
+     */
+    public function keyBy($keyBy)
+    {
+    }
+
     /**
      * @return Collection<int,TKey>
      */
@@ -405,6 +416,13 @@ class Collection implements ArrayAccess, Enumerable
     {
     }
 
+    /**
+     * @return array<TKey,TValue>
+     */
+    public function toArray()
+    {
+    }
+
     /**
      * @template TCallbackReturn
      * @param Closure(TValue,?TKey):TCallbackReturn $callback
diff --git a/tests/acceptance/IlluminateSupportCollection.feature b/tests/acceptance/IlluminateSupportCollection.feature
index 801776a..b531c5b 100644
--- a/tests/acceptance/IlluminateSupportCollection.feature
+++ b/tests/acceptance/IlluminateSupportCollection.feature
@@ -34,7 +34,7 @@ Feature: Collections
         When I run Psalm
         Then I see these errors
             | Type                  | Message                                                                          |
-            | InvalidScalarArgument | Argument 1 of Illuminate\Support\Collection::add expects bool, int(1) provided   |
+            | InvalidScalarArgument | Argument 1 of Illuminate\Support\Collection::add expects bool, 1 provided   |
         And I see no other errors
 
     @Collection::times
@@ -55,6 +55,7 @@ Feature: Collections
             """
             /** @var Collection<string,string> */
             $c = new Collection(['a' => 'A', 'b' => 'B', 'c' => 'C']);
+            /** @psalm-suppress UnusedMethodCall */
             $c->all()[1];
             """
         When I run Psalm
@@ -69,6 +70,7 @@ Feature: Collections
             """
             /** @var Collection<string,string> */
             $c = new Collection(['a' => 'A', 'b' => 'B', 'c' => 'C']);
+            /** @psalm-suppress UnusedMethodCall */
             $c->all()['a'];
             """
         When I run Psalm
@@ -85,7 +87,7 @@ Feature: Collections
         When I run Psalm
         Then I see these errors
             | Type                  | Message                                                                          |
-            | InvalidScalarArgument | Argument 1 of Illuminate\Support\Collection::add expects string, int(1) provided |
+            | InvalidScalarArgument | Argument 1 of Illuminate\Support\Collection::add expects string, 1 provided |
         And I see no other errors
 
     @Collection::add