diff --git a/packages/core-js/modules/es.math.asinh.js b/packages/core-js/modules/es.math.asinh.js
index acccac0f6d4f..6c7080b2086e 100644
--- a/packages/core-js/modules/es.math.asinh.js
+++ b/packages/core-js/modules/es.math.asinh.js
@@ -7,7 +7,7 @@ var sqrt = Math.sqrt;
 
 function asinh(x) {
   var n = +x;
-  return !isFinite(n) || n == 0 ? n : n < 0 ? -asinh(-n) : log(n + sqrt(n * n + 1));
+  return !isFinite(n) || n === 0 ? n : n < 0 ? -asinh(-n) : log(n + sqrt(n * n + 1));
 }
 
 var FORCED = !($asinh && 1 / $asinh(0) > 0);
diff --git a/packages/core-js/modules/es.math.atanh.js b/packages/core-js/modules/es.math.atanh.js
index d4e19d4315bc..e4de84d5bc57 100644
--- a/packages/core-js/modules/es.math.atanh.js
+++ b/packages/core-js/modules/es.math.atanh.js
@@ -12,6 +12,6 @@ var FORCED = !($atanh && 1 / $atanh(-0) < 0);
 $({ target: 'Math', stat: true, forced: FORCED }, {
   atanh: function atanh(x) {
     var n = +x;
-    return n == 0 ? n : log((1 + n) / (1 - n)) / 2;
+    return n === 0 ? n : log((1 + n) / (1 - n)) / 2;
   }
 });
diff --git a/packages/core-js/modules/es.math.imul.js b/packages/core-js/modules/es.math.imul.js
index 3ccdfbd79f7f..f230ffc18080 100644
--- a/packages/core-js/modules/es.math.imul.js
+++ b/packages/core-js/modules/es.math.imul.js
@@ -5,7 +5,7 @@ var fails = require('../internals/fails');
 var $imul = Math.imul;
 
 var FORCED = fails(function () {
-  return $imul(0xFFFFFFFF, 5) != -5 || $imul.length != 2;
+  return $imul(0xFFFFFFFF, 5) !== -5 || $imul.length !== 2;
 });
 
 // `Math.imul` method
diff --git a/packages/core-js/modules/es.math.tanh.js b/packages/core-js/modules/es.math.tanh.js
index c3f7273e2eca..9d4fac5846a8 100644
--- a/packages/core-js/modules/es.math.tanh.js
+++ b/packages/core-js/modules/es.math.tanh.js
@@ -10,6 +10,6 @@ $({ target: 'Math', stat: true }, {
     var n = +x;
     var a = expm1(n);
     var b = expm1(-n);
-    return a == Infinity ? 1 : b == Infinity ? -1 : (a - b) / (exp(n) + exp(-n));
+    return a === Infinity ? 1 : b === Infinity ? -1 : (a - b) / (exp(n) + exp(-n));
   }
 });
diff --git a/packages/core-js/modules/es.promise.constructor.js b/packages/core-js/modules/es.promise.constructor.js
index e82feb3a5978..8a5f0bd258f7 100644
--- a/packages/core-js/modules/es.promise.constructor.js
+++ b/packages/core-js/modules/es.promise.constructor.js
@@ -57,7 +57,7 @@ var isThenable = function (it) {
 
 var callReaction = function (reaction, state) {
   var value = state.value;
-  var ok = state.state == FULFILLED;
+  var ok = state.state === FULFILLED;
   var handler = ok ? reaction.ok : reaction.fail;
   var resolve = reaction.resolve;
   var reject = reaction.reject;
diff --git a/packages/core-js/modules/es.string.from-code-point.js b/packages/core-js/modules/es.string.from-code-point.js
index 9dc217a84b26..1c7a4a282394 100644
--- a/packages/core-js/modules/es.string.from-code-point.js
+++ b/packages/core-js/modules/es.string.from-code-point.js
@@ -9,7 +9,7 @@ var $fromCodePoint = String.fromCodePoint;
 var join = uncurryThis([].join);
 
 // length should be 1, old FF problem
-var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
+var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length !== 1;
 
 // `String.fromCodePoint` method
 // https://tc39.es/ecma262/#sec-string.fromcodepoint