diff --git a/lib/rules/use-isnan.js b/lib/rules/use-isnan.js
index 8a99100b06f..50ed8c59901 100644
--- a/lib/rules/use-isnan.js
+++ b/lib/rules/use-isnan.js
@@ -15,7 +15,7 @@ module.exports = function (context) {
 
     return {
         "BinaryExpression": function (node) {
-            if (/^[<>]=?|^===?|^!==?$/.test(node.operator) && (node.left.name === "NaN" || node.right.name === "NaN")) {
+            if (/^(?:[<>]|[!=]=)=?$/.test(node.operator) && (node.left.name === "NaN" || node.right.name === "NaN")) {
                 context.report(node, "Use the isNaN function to compare with NaN.");
             }
         }