diff --git a/src/Illuminate/Collections/Collection.php b/src/Illuminate/Collections/Collection.php
index 73adf3606965..8dbef5ea7fe1 100644
--- a/src/Illuminate/Collections/Collection.php
+++ b/src/Illuminate/Collections/Collection.php
@@ -665,7 +665,7 @@ public function intersectByKeys($items)
      *
      * @phpstan-assert-if-true null $this->first()
      *
-     * @phpstan-assert-if-false !null $this->first()
+     * @phpstan-assert-if-false TValue $this->first()
      *
      * @return bool
      */
diff --git a/src/Illuminate/Collections/Traits/EnumeratesValues.php b/src/Illuminate/Collections/Traits/EnumeratesValues.php
index 14fc0ba399a7..2ea0880c2398 100644
--- a/src/Illuminate/Collections/Traits/EnumeratesValues.php
+++ b/src/Illuminate/Collections/Traits/EnumeratesValues.php
@@ -367,7 +367,7 @@ public function ensure($type)
     /**
      * Determine if the collection is not empty.
      *
-     * @phpstan-assert-if-true !null $this->first()
+     * @phpstan-assert-if-true TValue $this->first()
      *
      * @phpstan-assert-if-false null $this->first()
      *
diff --git a/types/Support/Collection.php b/types/Support/Collection.php
index 2e8b4a926386..94769f8dc8ee 100644
--- a/types/Support/Collection.php
+++ b/types/Support/Collection.php
@@ -487,6 +487,20 @@ function ($collection, $count) {
 assertType('string|User', $collection->first(null, function () {
     return 'string';
 }));
+if ($collection->isNotEmpty()) {
+    assertType('User', $collection->first());
+    assertType('string|User', $collection->first(null, 'foo'));
+} else {
+    assertType('null', $collection->first());
+    assertType('string|User', $collection->first(null, 'foo'));
+}
+if ($collection->isEmpty()) {
+    assertType('null', $collection->first());
+    assertType('string|User', $collection->first(null, 'foo'));
+} else {
+    assertType('User', $collection->first());
+    assertType('string|User', $collection->first(null, 'foo'));
+}
 
 assertType('Illuminate\Support\Collection<int, mixed>', $collection->flatten());
 assertType('Illuminate\Support\Collection<int, mixed>', $collection::make(['string' => 'string'])->flatten(4));