diff --git a/js/js.translator/testData/maps.js b/js/js.translator/testData/maps.js
index 1ba35684bbe..f286d985ed3 100644
--- a/js/js.translator/testData/maps.js
+++ b/js/js.translator/testData/maps.js
@@ -46,6 +46,12 @@
         }
     }
 
+    function hashSetEquals(o) {
+        if (o === null || o === undefined || this.size() !== o.size()) return false;
+
+        return this.containsAll_4fm7v2$(o);
+    }
+
     /** @const */
     var FUNCTION = "function";
     var arrayRemoveAt = (typeof Array.prototype.splice == FUNCTION) ?
@@ -686,6 +692,7 @@
         },
         /** @lends {Kotlin.LinkedHashSet.prototype} */
         {
+            equals_za3rmp$: hashSetEquals,
             size: function () {
                 return this.map.size()
             },
@@ -753,6 +760,7 @@
         },
         /** @lends {Kotlin.AbstractPrimitiveHashSet.prototype} */
         {
+            equals_za3rmp$: hashSetEquals,
             size: function () {
                 return this.$size;
             },
@@ -898,27 +906,7 @@
             return h;
         };
 
-        this.equals_za3rmp$ = function (o) {
-            if (o === null || o === undefined) return false;
-            if (this.size() === o.size()) {
-                var iter1 = this.iterator();
-                var iter2 = o.iterator();
-                while (true) {
-                    var hn1 = iter1.hasNext();
-                    var hn2 = iter2.hasNext();
-                    if (hn1 != hn2) return false;
-                    if (!hn2) {
-                        return true;
-                    }
-                    else {
-                        var o1 = iter1.next();
-                        var o2 = iter2.next();
-                        if (!Kotlin.equals(o1, o2)) return false;
-                    }
-                }
-            }
-            return false;
-        };
+        this.equals_za3rmp$ = hashSetEquals;
 
         this.toString = function () {
             var builder = "[";
diff --git a/libraries/stdlib/test/js/SetJsTest.kt b/libraries/stdlib/test/js/SetJsTest.kt
index 7a583e5627e..ef3692978fd 100644
--- a/libraries/stdlib/test/js/SetJsTest.kt
+++ b/libraries/stdlib/test/js/SetJsTest.kt
@@ -17,7 +17,7 @@ class ComplexSetJsTest : SetJsTest() {
         assertEquals(data, set)
     }
 
-    /*Test*/ override fun constructors() {
+    Test override fun constructors() {
         doTest<String>()
     }
 
@@ -29,7 +29,7 @@ class ComplexSetJsTest : SetJsTest() {
 class PrimitiveSetJsTest : SetJsTest() {
     override fun createEmptyMutableSet(): MutableSet<String> = HashSet()
     override fun createEmptyMutableSetWithNullableValues(): MutableSet<String?> = HashSet()
-    /*Test*/ override fun constructors() {
+    Test override fun constructors() {
         HashSet<String>()
         HashSet<String>(3)
         HashSet<String>(3, 0.5f)
@@ -70,6 +70,13 @@ abstract class SetJsTest {
         assertTrue(empty.isEmpty())
     }
 
+    Test fun equals() {
+        assertNotEquals(createEmptyMutableSet(), data)
+        assertNotEquals(data, empty)
+        assertEquals(createEmptyMutableSet(), empty)
+        assertEquals(createTestMutableSetReversed(), data)
+    }
+
     Test fun contains() {
         assertTrue(data.contains("foo"))
         assertTrue(data.contains("bar"))
@@ -209,4 +216,10 @@ abstract class SetJsTest {
         set.add("bar")
         return set
     }
+    fun createTestMutableSetReversed(): MutableSet<String> {
+        val set = createEmptyMutableSet()
+        set.add("bar")
+        set.add("foo")
+        return set
+    }
 }