diff --git a/src/Users/SqlUserService.php b/src/Users/SqlUserService.php
index 2aef194..bfeeac3 100644
--- a/src/Users/SqlUserService.php
+++ b/src/Users/SqlUserService.php
@@ -161,7 +161,7 @@ public function getUserById(int $id): User
         $statement->execute(['id' => $id]);
         $row = $statement->fetch(PDO::FETCH_ASSOC);
 
-        if (empty($row)) {
+        if ($row === false || \count($row) === 0) {
             throw new UserNotFoundException("No user found with ID $id");
         }
 
diff --git a/tests/Integration/IntegrationTestCase.php b/tests/Integration/IntegrationTestCase.php
index f82a329..7e8233e 100644
--- a/tests/Integration/IntegrationTestCase.php
+++ b/tests/Integration/IntegrationTestCase.php
@@ -21,7 +21,8 @@ protected function setUp(): void
         parent::setUp();
 
         // Auto-call certain trait methods if the test case uses them
-        $traits = \class_uses($this) ?: [];
+        $traits = \class_uses($this);
+        $traits = $traits === false ? [] : $traits;
 
         if (isset($traits[MigratesDatabase::class])) {
             /** @psalm-suppress UndefinedMethod This method will exist because it uses the migration trait */