diff --git a/rules/Php56/NodeAnalyzer/UndefinedVariableResolver.php b/rules/Php56/NodeAnalyzer/UndefinedVariableResolver.php
index 4c011a322ce..318a351c046 100644
--- a/rules/Php56/NodeAnalyzer/UndefinedVariableResolver.php
+++ b/rules/Php56/NodeAnalyzer/UndefinedVariableResolver.php
@@ -14,7 +14,6 @@
 use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Expr\Isset_;
 use PhpParser\Node\Expr\List_;
-use PhpParser\Node\Expr\Ternary;
 use PhpParser\Node\Expr\Variable;
 use PhpParser\Node\FunctionLike;
 use PhpParser\Node\Stmt\ClassMethod;
@@ -116,9 +115,9 @@ private function issetOrUnsetParent(Node $parentNode): bool
         return in_array($parentNode::class, [Unset_::class, UnsetCast::class, Isset_::class], true);
     }
 
-    private function conditionParent(Node $parentNode): bool
+    private function isAsCoalesceLeft(Node $parentNode, Variable $variable): bool
     {
-        return in_array($parentNode::class, [Ternary::class, Coalesce::class], true);
+        return $parentNode instanceof Coalesce && $parentNode->left === $variable;
     }
 
     private function isAssignOrStaticVariableParent(Node $parentNode): bool
@@ -149,6 +148,10 @@ private function shouldSkipVariable(Variable $variable): bool
             return true;
         }
 
+        if ($this->isAsCoalesceLeft($parentNode, $variable)) {
+            return true;
+        }
+
         // list() = | [$values] = defines variables as null
         if ($this->isListAssign($parentNode)) {
             return true;