diff --git a/src/Psalm/Internal/Scope/CaseScope.php b/src/Psalm/Internal/Scope/CaseScope.php
index 220ac60e5..fa921007e 100644
--- a/src/Psalm/Internal/Scope/CaseScope.php
+++ b/src/Psalm/Internal/Scope/CaseScope.php
@@ -26,6 +26,6 @@ class CaseScope
 
     public function __destruct()
     {
-        $this->parent_context = null;
+        unset($this->parent_context);
     }
 }
diff --git a/src/Psalm/Internal/Scope/LoopScope.php b/src/Psalm/Internal/Scope/LoopScope.php
index aa4092df4..2bbfe903b 100644
--- a/src/Psalm/Internal/Scope/LoopScope.php
+++ b/src/Psalm/Internal/Scope/LoopScope.php
@@ -67,7 +67,7 @@ class LoopScope
 
     public function __destruct()
     {
-        $this->loop_context = null;
-        $this->loop_parent_context = null;
+        unset($this->loop_context);
+        unset($this->loop_parent_context);
     }
 }