diff --git a/compiler/testData/codegen/box/bridges/complexTraitImpl.kt b/compiler/testData/codegen/box/bridges/complexTraitImpl.kt
index dafbf0a5961..ff5edc8750b 100644
--- a/compiler/testData/codegen/box/bridges/complexTraitImpl.kt
+++ b/compiler/testData/codegen/box/bridges/complexTraitImpl.kt
@@ -1,14 +1,11 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-import java.util.Arrays
-
+// WITH_RUNTIME
 
 abstract class A {
     abstract fun foo(): List<String>
 }
 
 interface B {
-    fun foo(): ArrayList<String> = ArrayList(Arrays.asList("B"))
+    fun foo(): ArrayList<String> = ArrayList(listOf("B"))
 }
 
 open class C : A(), B {
diff --git a/compiler/testData/codegen/box/bridges/noBridgeOnMutableCollectionInheritance.kt b/compiler/testData/codegen/box/bridges/noBridgeOnMutableCollectionInheritance.kt
index 9b1cf547db0..59e364fe37f 100644
--- a/compiler/testData/codegen/box/bridges/noBridgeOnMutableCollectionInheritance.kt
+++ b/compiler/testData/codegen/box/bridges/noBridgeOnMutableCollectionInheritance.kt
@@ -1,6 +1,4 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-import java.util.Arrays
+// WITH_RUNTIME
 
 interface A {
     fun foo(): Collection<String>
@@ -11,7 +9,7 @@ interface B : A {
 }
 
 class C : B {
-    override fun foo(): MutableList<String> = ArrayList(Arrays.asList("C"))
+    override fun foo(): MutableList<String> = ArrayList(listOf("C"))
 }
 
 fun box(): String {
diff --git a/compiler/testData/codegen/box/callableReference/function/sortListOfStrings.kt b/compiler/testData/codegen/box/callableReference/function/sortListOfStrings.kt
index 917ace76a62..5672692f9a8 100644
--- a/compiler/testData/codegen/box/callableReference/function/sortListOfStrings.kt
+++ b/compiler/testData/codegen/box/callableReference/function/sortListOfStrings.kt
@@ -1,22 +1,14 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-import java.util.ArrayList
-import java.util.Arrays
-import java.util.Collections
-import java.util.Comparator
+// WITH_RUNTIME
 
 fun sort(list: MutableList<String>, comparator: (String, String) -> Int) {
-    Collections.sort(list, object : Comparator<String> {
-        override fun compare(p0: String, p1: String) = comparator(p0, p1)
-    })
+    list.sortWith(Comparator(comparator))
 }
 
 fun compare(s1: String, s2: String) = s1.compareTo(s2)
 
 fun box(): String {
-    val l = ArrayList(Arrays.asList("d", "b", "c", "e", "a"))
+    val l = mutableListOf("d", "b", "c", "e", "a")
     sort(l, ::compare)
-    if (l != Arrays.asList("a", "b", "c", "d", "e")) return "Fail: $l"
+    if (l != listOf("a", "b", "c", "d", "e")) return "Fail: $l"
     return "OK"
 }
diff --git a/compiler/testData/codegen/box/casts/mutableCollections/asWithMutable.kt b/compiler/testData/codegen/box/casts/mutableCollections/asWithMutable.kt
index b896ab5ea3b..093fae25b18 100644
--- a/compiler/testData/codegen/box/casts/mutableCollections/asWithMutable.kt
+++ b/compiler/testData/codegen/box/casts/mutableCollections/asWithMutable.kt
@@ -1,10 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.*
-
 class Itr : Iterator<String> by ArrayList<String>().iterator()
 class MItr : MutableIterator<String> by ArrayList<String>().iterator()
 class LItr : ListIterator<String> by ArrayList<String>().listIterator()
@@ -37,7 +32,7 @@ inline fun asFailsWithCCE(operation: String, block: () -> Unit) {
     try {
         block()
     }
-    catch (e: java.lang.ClassCastException) {
+    catch (e: ClassCastException) {
         return
     }
     catch (e: Throwable) {
diff --git a/compiler/testData/codegen/box/casts/mutableCollections/isWithMutable.kt b/compiler/testData/codegen/box/casts/mutableCollections/isWithMutable.kt
index 2ec5791c1c1..56e8fb846c8 100644
--- a/compiler/testData/codegen/box/casts/mutableCollections/isWithMutable.kt
+++ b/compiler/testData/codegen/box/casts/mutableCollections/isWithMutable.kt
@@ -1,10 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.*
-
 class Itr : Iterator<String> by ArrayList<String>().iterator()
 class MItr : MutableIterator<String> by ArrayList<String>().iterator()
 class LItr : ListIterator<String> by ArrayList<String>().listIterator()
@@ -33,6 +28,8 @@ class MME : MutableMap.MutableEntry<String, String> {
     override fun setValue(value: String): String = throw UnsupportedOperationException()
 }
 
+fun assert(condition: Boolean, message: () -> String) { if (!condition) throw AssertionError(message())}
+
 fun box(): String {
     val itr = Itr() as Any
     val mitr = MItr()
diff --git a/compiler/testData/codegen/box/casts/mutableCollections/reifiedAsWithMutable.kt b/compiler/testData/codegen/box/casts/mutableCollections/reifiedAsWithMutable.kt
index 488b33be755..77d2d3b8683 100644
--- a/compiler/testData/codegen/box/casts/mutableCollections/reifiedAsWithMutable.kt
+++ b/compiler/testData/codegen/box/casts/mutableCollections/reifiedAsWithMutable.kt
@@ -1,10 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.*
-
 class Itr : Iterator<String> by ArrayList<String>().iterator()
 class MItr : MutableIterator<String> by ArrayList<String>().iterator()
 class LItr : ListIterator<String> by ArrayList<String>().listIterator()
@@ -46,7 +41,7 @@ inline fun <reified T> reifiedAsFailsWithCCE(x: Any, operation: String) {
     try {
         x as T
     }
-    catch (e: java.lang.ClassCastException) {
+    catch (e: ClassCastException) {
         return
     }
     catch (e: Throwable) {
diff --git a/compiler/testData/codegen/box/casts/mutableCollections/reifiedIsWithMutable.kt b/compiler/testData/codegen/box/casts/mutableCollections/reifiedIsWithMutable.kt
index 4266d12d25d..df6e233f20a 100644
--- a/compiler/testData/codegen/box/casts/mutableCollections/reifiedIsWithMutable.kt
+++ b/compiler/testData/codegen/box/casts/mutableCollections/reifiedIsWithMutable.kt
@@ -1,10 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.*
-
 class Itr : Iterator<String> by ArrayList<String>().iterator()
 class MItr : MutableIterator<String> by ArrayList<String>().iterator()
 class LItr : ListIterator<String> by ArrayList<String>().listIterator()
@@ -36,6 +31,8 @@ class MME : MutableMap.MutableEntry<String, String> {
 inline fun <reified T> reifiedIs(x: Any): Boolean = x is T
 inline fun <reified T> reifiedIsNot(x: Any): Boolean = x !is T
 
+fun assert(condition: Boolean, message: () -> String) { if (!condition) throw AssertionError(message())}
+
 fun box(): String {
     val itr = Itr() as Any
     val mitr = MItr()
diff --git a/compiler/testData/codegen/box/casts/mutableCollections/safeAsWithMutable.kt b/compiler/testData/codegen/box/casts/mutableCollections/safeAsWithMutable.kt
index 60cf1cd8860..58113095c09 100644
--- a/compiler/testData/codegen/box/casts/mutableCollections/safeAsWithMutable.kt
+++ b/compiler/testData/codegen/box/casts/mutableCollections/safeAsWithMutable.kt
@@ -1,10 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.*
-
 class Itr : Iterator<String> by ArrayList<String>().iterator()
 class MItr : MutableIterator<String> by ArrayList<String>().iterator()
 class LItr : ListIterator<String> by ArrayList<String>().listIterator()
@@ -33,6 +28,9 @@ class MME : MutableMap.MutableEntry<String, String> {
     override fun setValue(value: String): String = throw UnsupportedOperationException()
 }
 
+fun assert(condition: Boolean, message: () -> String) { if (!condition) throw AssertionError(message())}
+
+
 inline fun safeAsReturnsNull(operation: String, cast: () -> Any?) {
     try {
         val x = cast()
diff --git a/compiler/testData/codegen/box/controlStructures/continueInForCondition.kt b/compiler/testData/codegen/box/controlStructures/continueInForCondition.kt
index e0d08a601ef..3ebace16102 100644
--- a/compiler/testData/codegen/box/controlStructures/continueInForCondition.kt
+++ b/compiler/testData/codegen/box/controlStructures/continueInForCondition.kt
@@ -1,9 +1,6 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
+// WITH_RUNTIME
 
-import java.util.Arrays
-
-fun foo(): List<String>? = Arrays.asList("abcde")
+fun foo(): List<String>? = listOf("abcde")
 
 fun box(): String {
     for (i in 1..3) {
diff --git a/compiler/testData/codegen/box/controlStructures/kt513.kt b/compiler/testData/codegen/box/controlStructures/kt513.kt
index 72fb0578b7b..74092c47aed 100644
--- a/compiler/testData/codegen/box/controlStructures/kt513.kt
+++ b/compiler/testData/codegen/box/controlStructures/kt513.kt
@@ -1,7 +1,4 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-import java.util.*
+// WITH_RUNTIME
 
 class A() {
     infix fun <T> ArrayList<T>.add3(el: T) = add(el)
@@ -22,6 +19,6 @@ fun box() : String{
       list add2 i
     }
     A().test(list)
-    System.out?.println(list)
+    println(list)
     return "OK"
 }
diff --git a/compiler/testData/codegen/box/extensionFunctions/kt475.kt b/compiler/testData/codegen/box/extensionFunctions/kt475.kt
index 07b528353c9..f81998986f4 100644
--- a/compiler/testData/codegen/box/extensionFunctions/kt475.kt
+++ b/compiler/testData/codegen/box/extensionFunctions/kt475.kt
@@ -1,7 +1,3 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-import java.util.ArrayList
 
 fun box() : String {
   val array = ArrayList<String>()
@@ -14,7 +10,7 @@ fun box() : String {
 
 var <T> ArrayList<T>.length : Int
     get() = size
-    set(value: Int) = throw java.lang.Error()
+    set(value: Int) = throw Error()
 
 var <T> ArrayList<T>.last : T
     get() = get(size-1)!!
diff --git a/compiler/testData/codegen/box/sam/constructors/comparator.kt b/compiler/testData/codegen/box/sam/constructors/comparator.kt
index 46f45a6be59..894b52dfe03 100644
--- a/compiler/testData/codegen/box/sam/constructors/comparator.kt
+++ b/compiler/testData/codegen/box/sam/constructors/comparator.kt
@@ -1,11 +1,8 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-import java.util.*
+// WITH_RUNTIME
 
 fun box(): String {
-    val list = ArrayList(Arrays.asList(3, 2, 4, 8, 1, 5))
-    val expected = ArrayList(Arrays.asList(8, 5, 4, 3, 2, 1))
-    Collections.sort(list, Comparator { a, b -> b - a })
+    val list = mutableListOf(3, 2, 4, 8, 1, 5)
+    val expected = listOf(8, 5, 4, 3, 2, 1)
+    list.sortWith(Comparator { a, b -> b - a })
     return if (list == expected) "OK" else list.toString()
 }
\ No newline at end of file
diff --git a/compiler/testData/codegen/box/sam/constructors/nonLiteralComparator.kt b/compiler/testData/codegen/box/sam/constructors/nonLiteralComparator.kt
index b2e281a30ae..5dfa3b5926f 100644
--- a/compiler/testData/codegen/box/sam/constructors/nonLiteralComparator.kt
+++ b/compiler/testData/codegen/box/sam/constructors/nonLiteralComparator.kt
@@ -1,12 +1,9 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
-import java.util.*
+// WITH_RUNTIME
 
 fun box(): String {
-    val list = ArrayList(Arrays.asList(3, 2, 4, 8, 1, 5))
-    val expected = ArrayList(Arrays.asList(8, 5, 4, 3, 2, 1))
+    val list = mutableListOf(3, 2, 4, 8, 1, 5)
+    val expected = listOf(8, 5, 4, 3, 2, 1)
     val comparatorFun: (Int, Int) -> Int = { a, b -> b - a }
-    Collections.sort(list, Comparator(comparatorFun))
+    list.sortWith(Comparator(comparatorFun))
     return if (list == expected) "OK" else list.toString()
 }
diff --git a/compiler/testData/codegen/box/toArray/kt3177-toTypedArray.kt b/compiler/testData/codegen/box/toArray/kt3177-toTypedArray.kt
index 3b53b80a28e..6d941babc19 100644
--- a/compiler/testData/codegen/box/toArray/kt3177-toTypedArray.kt
+++ b/compiler/testData/codegen/box/toArray/kt3177-toTypedArray.kt
@@ -1,11 +1,5 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.ArrayList
-import java.util.Arrays
-
 fun box(): String {
     val list = ArrayList<Pair<String,String>>()
     list.add(Pair("Sample", "http://cyber.law.harvard.edu/rss/examples/rss2sample.xml"))
@@ -13,7 +7,7 @@ fun box(): String {
 
     val keys = list.map { it.first }.toTypedArray<String>()
 
-    val keysToString = Arrays.toString(keys)
+    val keysToString = keys.contentToString()
     if (keysToString != "[Sample, Scripting]") return keysToString
 
     return "OK"
diff --git a/compiler/testData/codegen/box/toArray/returnToTypedArray.kt b/compiler/testData/codegen/box/toArray/returnToTypedArray.kt
index 41c2f7fad44..5986dbe5bf4 100644
--- a/compiler/testData/codegen/box/toArray/returnToTypedArray.kt
+++ b/compiler/testData/codegen/box/toArray/returnToTypedArray.kt
@@ -1,14 +1,9 @@
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS
-
 // WITH_RUNTIME
 
-import java.util.Arrays
-
-fun getCopyToArray(): Array<Int> = Arrays.asList(2, 3, 9).toTypedArray()
+fun getCopyToArray(): Array<Int> = listOf(2, 3, 9).toTypedArray()
 
 fun box(): String {
-    val str = Arrays.toString(getCopyToArray())
+    val str = getCopyToArray().contentToString()
     if (str != "[2, 3, 9]") return str
 
     return "OK"
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
index 1a71b851458..cd354d7af7a 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
@@ -1226,13 +1226,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("complexTraitImpl.kt")
         public void testComplexTraitImpl() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/bridges/complexTraitImpl.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("delegation.kt")
@@ -1388,13 +1382,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("noBridgeOnMutableCollectionInheritance.kt")
         public void testNoBridgeOnMutableCollectionInheritance() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/bridges/noBridgeOnMutableCollectionInheritance.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("overrideAbstractProperty.kt")
@@ -2237,13 +2225,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("sortListOfStrings.kt")
             public void testSortListOfStrings() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/callableReference/function/sortListOfStrings.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("topLevelFromClass.kt")
@@ -2999,25 +2981,13 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("asWithMutable.kt")
             public void testAsWithMutable() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/casts/mutableCollections/asWithMutable.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("isWithMutable.kt")
             public void testIsWithMutable() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/casts/mutableCollections/isWithMutable.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("mutabilityMarkerInterfaces.kt")
@@ -3035,25 +3005,13 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("reifiedAsWithMutable.kt")
             public void testReifiedAsWithMutable() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/casts/mutableCollections/reifiedAsWithMutable.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("reifiedIsWithMutable.kt")
             public void testReifiedIsWithMutable() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/casts/mutableCollections/reifiedIsWithMutable.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("reifiedSafeAsWithMutable.kt")
@@ -3065,13 +3023,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("safeAsWithMutable.kt")
             public void testSafeAsWithMutable() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/casts/mutableCollections/safeAsWithMutable.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("weirdMutableCasts.kt")
@@ -4578,13 +4530,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("continueInForCondition.kt")
         public void testContinueInForCondition() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/controlStructures/continueInForCondition.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("continueInWhile.kt")
@@ -4872,13 +4818,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("kt513.kt")
         public void testKt513() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/controlStructures/kt513.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("kt628.kt")
@@ -7809,13 +7749,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("kt475.kt")
         public void testKt475() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/extensionFunctions/kt475.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("kt5467.kt")
@@ -18935,13 +18869,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("comparator.kt")
             public void testComparator() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/sam/constructors/comparator.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("filenameFilter.kt")
@@ -18959,13 +18887,7 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             @TestMetadata("nonLiteralComparator.kt")
             public void testNonLiteralComparator() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/sam/constructors/nonLiteralComparator.kt");
-                try {
-                    doTest(fileName);
-                }
-                catch (Throwable ignore) {
-                    return;
-                }
-                throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+                doTest(fileName);
             }
 
             @TestMetadata("nonLiteralFilenameFilter.kt")
@@ -20175,25 +20097,13 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
         @TestMetadata("kt3177-toTypedArray.kt")
         public void testKt3177_toTypedArray() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/toArray/kt3177-toTypedArray.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("returnToTypedArray.kt")
         public void testReturnToTypedArray() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/toArray/returnToTypedArray.kt");
-            try {
-                doTest(fileName);
-            }
-            catch (Throwable ignore) {
-                return;
-            }
-            throw new AssertionError("Looks like this test can be unmuted. Remove IGNORE_BACKEND directive for that.");
+            doTest(fileName);
         }
 
         @TestMetadata("toTypedArray.kt")