diff --git a/compiler/testData/codegen/box/callableReference/function/overloadedFun.kt b/compiler/testData/codegen/box/callableReference/function/overloadedFun.kt
index 418e67f5f74..569ef57a1bb 100644
--- a/compiler/testData/codegen/box/callableReference/function/overloadedFun.kt
+++ b/compiler/testData/codegen/box/callableReference/function/overloadedFun.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 fun foo(): String = "foo1"
 fun foo(i: Int): String = "foo2"
 
diff --git a/compiler/testData/codegen/boxInline/noInline/extensionReceiver.kt b/compiler/testData/codegen/boxInline/noInline/extensionReceiver.kt
index 8ca86667ee9..fb7231ad92a 100644
--- a/compiler/testData/codegen/boxInline/noInline/extensionReceiver.kt
+++ b/compiler/testData/codegen/boxInline/noInline/extensionReceiver.kt
@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // FILE: 1.kt
 
 inline fun (() -> String).test(): (() -> String) = { invoke() + this.invoke() + this() }
diff --git a/compiler/testData/codegen/boxInline/noInline/noInlineLambdaChainWithCapturedInline.kt b/compiler/testData/codegen/boxInline/noInline/noInlineLambdaChainWithCapturedInline.kt
index 90b41b445dd..da25cd59cc0 100644
--- a/compiler/testData/codegen/boxInline/noInline/noInlineLambdaChainWithCapturedInline.kt
+++ b/compiler/testData/codegen/boxInline/noInline/noInlineLambdaChainWithCapturedInline.kt
@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // FILE: 1.kt
 
 package test
diff --git a/compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/exceptionInFinally.kt b/compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/exceptionInFinally.kt
index a013b5c74e7..baa08eed3be 100644
--- a/compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/exceptionInFinally.kt
+++ b/compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/exceptionTable/exceptionInFinally.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // FILE: 1.kt
 // WITH_RUNTIME
 package test
@@ -19,8 +18,6 @@ public inline fun <T : MCloseable, R> T.muse(block: (T) -> R): R {
 
 import test.*
 import kotlin.test.assertEquals
-import kotlin.test.assertTrue
-import kotlin.test.fail
 
 class MyException(message: String) : Exception(message)
 
@@ -76,7 +73,7 @@ inline fun assertError(index: Int, expected: String, l: Test.()->Unit) {
     val testLocal = Test()
     try {
         testLocal.l()
-        fail("fail $index: no error")
+        throw AssertionError("fail $index: no error")
     } catch (e: Exception) {
         assertEquals(expected, testLocal.status.value, "failed on $index")
     }
diff --git a/js/js.translator/testData/box/callableReference/property/extensionProperty.kt b/js/js.translator/testData/box/callableReference/property/extensionProperty.kt
index a8011083612..cc51edfa41a 100644
--- a/js/js.translator/testData/box/callableReference/property/extensionProperty.kt
+++ b/js/js.translator/testData/box/callableReference/property/extensionProperty.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1300
 package foo
 
diff --git a/js/js.translator/testData/box/jsName/peculiarIdentifiers.kt b/js/js.translator/testData/box/jsName/peculiarIdentifiers.kt
index 0abdf942dc4..e160f1092b6 100644
--- a/js/js.translator/testData/box/jsName/peculiarIdentifiers.kt
+++ b/js/js.translator/testData/box/jsName/peculiarIdentifiers.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1294
 private fun `+`(a: Int, b: Int) = a + b
 
diff --git a/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt b/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt
index b09d72f2d30..896b6adb490 100644
--- a/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt
+++ b/js/js.translator/testData/box/reflection/jsClassOnReifiedTypeInLambda.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1320
 package foo
 
diff --git a/js/js.translator/testData/box/reflection/kClassOnReifiedTypeInLambda.kt b/js/js.translator/testData/box/reflection/kClassOnReifiedTypeInLambda.kt
index c92ca4be009..d70f05583a7 100644
--- a/js/js.translator/testData/box/reflection/kClassOnReifiedTypeInLambda.kt
+++ b/js/js.translator/testData/box/reflection/kClassOnReifiedTypeInLambda.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1320
 package foo
 
diff --git a/js/js.translator/testData/box/reified/capture.kt b/js/js.translator/testData/box/reified/capture.kt
index fa0e667db8b..b325b4cbece 100644
--- a/js/js.translator/testData/box/reified/capture.kt
+++ b/js/js.translator/testData/box/reified/capture.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1299
 interface I {
     fun foo(): String?
diff --git a/js/js.translator/testData/box/reified/lambda.kt b/js/js.translator/testData/box/reified/lambda.kt
index a0b7aa4f829..0460d5caf34 100644
--- a/js/js.translator/testData/box/reified/lambda.kt
+++ b/js/js.translator/testData/box/reified/lambda.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1545
 package foo
 
diff --git a/js/js.translator/testData/box/reified/lambdaNameClash.kt b/js/js.translator/testData/box/reified/lambdaNameClash.kt
index 20d8272ae94..e6d215b9932 100644
--- a/js/js.translator/testData/box/reified/lambdaNameClash.kt
+++ b/js/js.translator/testData/box/reified/lambdaNameClash.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1290
 package foo