diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
index b6d6b96e210..7fc46b1771d 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirLightTreeBlackBoxCodegenTestGenerated.java
@@ -47483,6 +47483,12 @@ public class FirLightTreeBlackBoxCodegenTestGenerated extends AbstractFirLightTr
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @Test
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @Test
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
index fc4f2788161..c2ff7ce44b4 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirPsiBlackBoxCodegenTestGenerated.java
@@ -47483,6 +47483,12 @@ public class FirPsiBlackBoxCodegenTestGenerated extends AbstractFirPsiBlackBoxCo
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @Test
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @Test
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
diff --git a/compiler/testData/codegen/box/classes/kt707.kt b/compiler/testData/codegen/box/classes/kt707.kt
index 1b972679eec..4291a3094c4 100644
--- a/compiler/testData/codegen/box/classes/kt707.kt
+++ b/compiler/testData/codegen/box/classes/kt707.kt
@@ -1,15 +1,8 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: Enable for JS when it supports Java class library.
-// IGNORE_BACKEND: JS, NATIVE
 class List<T>(val head: T, val tail: List<T>? = null)
 
 fun <T> List<T>.mapHead(f: (T)-> T): List<T> = List<T>(f(head), null)
 
 fun box() : String {
   val a: Int = List<Int>(1).mapHead{it * 2}.head
-  System.out?.println(a)
-  return "OK"
+  return if (a == 2) "OK" else a.toString()
 }
diff --git a/compiler/testData/codegen/box/controlStructures/kt237.kt b/compiler/testData/codegen/box/controlStructures/kt237.kt
index 86d81d9225a..d806c712b37 100644
--- a/compiler/testData/codegen/box/controlStructures/kt237.kt
+++ b/compiler/testData/codegen/box/controlStructures/kt237.kt
@@ -1,18 +1,11 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 fun main(args: Array<String>?) {
     val y: Unit = Unit //do not compile
     A<Unit>()        //do not compile
     C<Unit>(Unit)      //do not compile
         //do not compile
-    System.out?.println(fff<Unit>(Unit))  //do not compile
-    System.out?.println(id<Unit>(y))  //do not compile
-    System.out?.println(fff<Unit>(id<Unit>(y)) == id<Unit>(foreach(arrayOfNulls<Int>(0) as Array<Int>,{ e : Int -> })))  //do not compile
+    fff<Unit>(Unit)  //do not compile
+    id<Unit>(y)  //do not compile
+    fff<Unit>(id<Unit>(y)) == id<Unit>(foreach(arrayOfNulls<Int>(0) as Array<Int>,{ e : Int -> }))  //do not compile
 }
 class A<T>()
 
@@ -41,7 +34,7 @@ fun box() : String {
     a[0] = 0
     a[1] = 1
     a[2] = 2
-    foreach(a, { el : Int -> System.out?.println(el) })
+    foreach(a, { el : Int -> el })
     almostFilter(a, { el : Int -> el })
     main(null)
     return "OK"
diff --git a/compiler/testData/codegen/box/controlStructures/kt769.kt b/compiler/testData/codegen/box/controlStructures/kt769.kt
index 72f9d9105d2..1f79d6700d6 100644
--- a/compiler/testData/codegen/box/controlStructures/kt769.kt
+++ b/compiler/testData/codegen/box/controlStructures/kt769.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 package w_range
 
 fun box() : String {
@@ -13,6 +6,5 @@ fun box() : String {
         1 -> i--
         else -> { i = 2 }
     }
-    System.out?.println(i)
-    return "OK"
+    return if (i == 2) "OK" else i.toString()
 }
diff --git a/compiler/testData/codegen/box/extensionFunctions/kt606.kt b/compiler/testData/codegen/box/extensionFunctions/kt606.kt
index fea7c3f3005..ea40cc28fae 100644
--- a/compiler/testData/codegen/box/extensionFunctions/kt606.kt
+++ b/compiler/testData/codegen/box/extensionFunctions/kt606.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 package kt606
 
 //KT-606 wrong resolved call
@@ -21,9 +14,11 @@ interface ChannelPipeline  {
   fun print(any: Any)
 }
 
+var result = "FAIL"
+
 class DefaultChannelPipeline : ChannelPipeline {
   override fun print(any: Any) {
-      System.out?.println(any)
+      result = any as String
   }
 
 }
@@ -34,5 +29,5 @@ interface ChannelPipelineFactory {
 
 fun box() : String {
     StandardPipelineFactory({ print("OK") }).getPipeline()
-    return "OK"
+    return result
 }
diff --git a/compiler/testData/codegen/box/objects/kt535.kt b/compiler/testData/codegen/box/objects/kt535.kt
index 18f16b6484d..29922f9f81d 100644
--- a/compiler/testData/codegen/box/objects/kt535.kt
+++ b/compiler/testData/codegen/box/objects/kt535.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 class Identifier<T>(t : T?, myHasDollar : Boolean) {
     private val myT : T?
 
@@ -22,7 +15,6 @@ class Identifier<T>(t : T?, myHasDollar : Boolean) {
 }
 
 fun box() : String {
-    var i3 : Identifier<String?>? = Identifier.init<String?>("name")
-    System.out?.println(i3?.getName())
-    return "OK"
+    var i3 : Identifier<String?>? = Identifier.init<String?>("OK")
+    return i3?.getName() ?: "FAIL"
 }
diff --git a/compiler/testData/codegen/box/primitiveTypes/kt753.kt b/compiler/testData/codegen/box/primitiveTypes/kt753.kt
index 6751346bda7..2094e8db917 100644
--- a/compiler/testData/codegen/box/primitiveTypes/kt753.kt
+++ b/compiler/testData/codegen/box/primitiveTypes/kt753.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 package bitwise_demo
 
 fun Long?.shl(bits : Int?) : Long = this!!.shl(bits!!)
@@ -13,6 +6,6 @@ fun box() : String {
     val x : Long? = 10
     val y : Int? = 12
 
-    System.out?.println(x.shl(y))
-    return "OK"
+    val result = x.shl(y)
+    return if (result == 40960L) "OK" else result.toString()
 }
diff --git a/compiler/testData/codegen/box/primitiveTypes/kt756.kt b/compiler/testData/codegen/box/primitiveTypes/kt756.kt
index d15cfec1619..f8221771b80 100644
--- a/compiler/testData/codegen/box/primitiveTypes/kt756.kt
+++ b/compiler/testData/codegen/box/primitiveTypes/kt756.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 package demo_range
 
 operator fun Int?.unaryPlus() : Int = this!!.unaryPlus()
@@ -14,6 +7,9 @@ operator fun Int?.unaryMinus() : Int = this!!.unaryMinus()
 
 fun box() : String {
     val x : Int? = 10
-    System.out?.println(x?.inv())// * x?.unaryPlus() * x?.dec() * x?.unaryMinus() as Number)
-    return "OK"
+    val result = x?.inv()
+    if (result == -11)// * x?.unaryPlus() * x?.dec() * x?.unaryMinus() as Number)
+        return "OK"
+    else
+        return result.toString()
 }
diff --git a/compiler/testData/codegen/box/primitiveTypes/kt757.kt b/compiler/testData/codegen/box/primitiveTypes/kt757.kt
index 4ff0a1231eb..437602aecaa 100644
--- a/compiler/testData/codegen/box/primitiveTypes/kt757.kt
+++ b/compiler/testData/codegen/box/primitiveTypes/kt757.kt
@@ -1,16 +1,9 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 package demo_long
 
 fun Long?.inv() : Long = this!!.inv()
 
 fun box() : String {
     val x : Long? = 10
-    System.out?.println(x.inv())
-    return if(x.inv() == -11.toLong()) "OK" else "fail"
+    val result = x.inv()
+    return if(result == -11.toLong()) "OK" else result.toString()
 }
diff --git a/compiler/testData/codegen/box/regressions/kt344.kt b/compiler/testData/codegen/box/regressions/kt344.kt
index 8b8ea6a0113..b1c5d39766f 100644
--- a/compiler/testData/codegen/box/regressions/kt344.kt
+++ b/compiler/testData/codegen/box/regressions/kt344.kt
@@ -1,10 +1,3 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 // WITH_STDLIB
 
 fun s0() : Boolean {
@@ -41,7 +34,6 @@ fun t1() : Boolean {
     foo()
 
     x += "bbb"
-    System.out?.println(x)
     return x == "4511122aaabbb"
 }
 
@@ -56,7 +48,6 @@ fun t2() : Boolean {
     }
     foo()
     x -= 55
-    System.out?.println(x)
     return x == 200
 }
 
@@ -79,7 +70,6 @@ fun t4() : Boolean {
         Unit
     }
     foo()
-    System.out?.println(x)
     return x == 440.toFloat()
 }
 
@@ -92,7 +82,6 @@ fun t5() : Boolean {
         Unit
     }
     foo()
-    System.out?.println(x)
     return x == 400.toDouble()
 }
 
@@ -106,7 +95,6 @@ fun t6() : Boolean {
         Unit
     }
     foo()
-    System.out?.println(x)
     return x == 83.toByte()
 }
 
@@ -117,7 +105,6 @@ fun t7() : Boolean {
         Unit
     }
     foo()
-    System.out?.println(x)
     return x == 'b'
 }
 
@@ -171,19 +158,6 @@ fun t11(x0: Int) : Int {
     return x
 }
 
-fun t12(x: Int) : Int {
-    var y = x
-    val runnable = object : Runnable {
-        override fun run () {
-            y = y + 1
-        }
-    }
-    while(y < 100) {
-       runnable.run()
-    }
-    return y
-}
-
 fun box(): String {
     if (!s0()) return "s0 fail"
     if (!s1()) return "s1 fail"
@@ -198,7 +172,6 @@ fun box(): String {
     if (!t9(0)) return "t9 fail"
     if (!t10()) return "t10 fail"
     if (t11(1) != 101) return "t11 fail"
-    if (t12(0) != 100) return "t12 fail"
 
     return "OK"
 }
diff --git a/compiler/testData/codegen/box/regressions/kt344Runnable.kt b/compiler/testData/codegen/box/regressions/kt344Runnable.kt
new file mode 100644
index 00000000000..2ebd7bc0d2b
--- /dev/null
+++ b/compiler/testData/codegen/box/regressions/kt344Runnable.kt
@@ -0,0 +1,21 @@
+// TARGET_BACKEND: JVM
+// TARGET_BACKEND: JVM_IR
+// WITH_STDLIB
+
+fun t12(x: Int) : Int {
+    var y = x
+    val runnable = object : Runnable {
+        override fun run () {
+            y = y + 1
+        }
+    }
+    while(y < 100) {
+       runnable.run()
+    }
+    return y
+}
+
+fun box(): String {
+    val result = t12(0)
+    return if (result == 100) "OK" else result.toString()
+}
diff --git a/compiler/testData/codegen/box/strings/kt889.kt b/compiler/testData/codegen/box/strings/kt889.kt
index 29357337755..52810370105 100644
--- a/compiler/testData/codegen/box/strings/kt889.kt
+++ b/compiler/testData/codegen/box/strings/kt889.kt
@@ -1,12 +1,4 @@
-// IGNORE_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
-// IGNORE_BACKEND: JS_IR
-// IGNORE_BACKEND: JS_IR_ES6
-// TODO: muted automatically, investigate should it be ran for JS or not
-// IGNORE_BACKEND: JS, NATIVE
-
 operator fun Int.plus(s: String) : String {
-  System.out?.println("Int.plus(s: String) called")
   return s
 }
 
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
index 61d84223c15..e67492048d2 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java
@@ -44813,6 +44813,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @Test
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @Test
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
index f43a3d903cb..5c9442472b4 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java
@@ -47483,6 +47483,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @Test
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @Test
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
index 180f1f1c292..c370d529c31 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenWithIrInlinerTestGenerated.java
@@ -47483,6 +47483,12 @@ public class IrBlackBoxCodegenWithIrInlinerTestGenerated extends AbstractIrBlack
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @Test
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @Test
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
diff --git a/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java b/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
index 259b6502360..e29ed009274 100644
--- a/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
+++ b/compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java
@@ -36215,6 +36215,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/regressions/kt3442.kt");
         }
 
+        @TestMetadata("kt344Runnable.kt")
+        public void testKt344Runnable() throws Exception {
+            runTest("compiler/testData/codegen/box/regressions/kt344Runnable.kt");
+        }
+
         @TestMetadata("kt3587.kt")
         public void testKt3587() throws Exception {
             runTest("compiler/testData/codegen/box/regressions/kt3587.kt");