diff --git a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
index 822dedc8115..2232433f828 100644
--- a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
+++ b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
@@ -21,15 +21,15 @@ private fun it(name: String, fn: () -> JsAny?): Unit =
 private fun xit(name: String, fn: () -> JsAny?): Unit =
     js("xit(name, fn)")
 
-private fun jsThrow(jsException: Dynamic) {
+private fun jsThrow(jsException: JsAny) {
     js("throw e")
 }
 
-private fun throwableToJsError(message: String, stack: String): Dynamic {
+private fun throwableToJsError(message: String, stack: String): JsAny {
     js("var e = new Error(); e.message = message; e.stack = stack; return e;")
 }
 
-private fun Throwable.toJsError(): Dynamic =
+private fun Throwable.toJsError(): JsAny =
     throwableToJsError(message ?: "", stackTraceToString())
 
 /**
@@ -52,7 +52,7 @@ internal class JasmineLikeAdapter : FrameworkAdapter {
                     .toThrowableOrNull()
                     ?.let { it.toJsError() }
                     ?: exception
-                Promise.reject(jsException) as Dynamic
+                Promise.reject(jsException)
             }
         } catch (exception: Throwable) {
             jsThrow(exception.toJsError())
diff --git a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/TeamcityAdapter.kt b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/TeamcityAdapter.kt
index 09ced3e36e5..3289b5777a6 100644
--- a/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/TeamcityAdapter.kt
+++ b/libraries/kotlin.test/wasm/src/main/kotlin/kotlin/test/TeamcityAdapter.kt
@@ -17,7 +17,7 @@ private external fun nodeArguments(): String
 
 internal class TeamcityAdapter : FrameworkAdapter {
 
-    private var scheduleNextTaskAfter: Promise<Dynamic?>? = null
+    private var scheduleNextTaskAfter: Promise<JsAny?>? = null
     private fun runOrScheduleNext(block: () -> Unit) {
         if (scheduleNextTaskAfter == null) {
             block()
@@ -26,14 +26,14 @@ internal class TeamcityAdapter : FrameworkAdapter {
         }
     }
 
-    private fun runOrScheduleNextWithResult(block: () -> Promise<Dynamic?>?) {
+    private fun runOrScheduleNextWithResult(block: () -> Promise<JsAny?>?) {
         if (scheduleNextTaskAfter == null) {
             val result = block()
             if (result != null)
                 scheduleNextTaskAfter = result
         } else {
             scheduleNextTaskAfter = scheduleNextTaskAfter!!.then {
-                block() as Dynamic?
+                block()
             }
         }
     }
diff --git a/libraries/stdlib/wasm/test/js/AsyncTest.kt b/libraries/stdlib/wasm/test/js/AsyncTest.kt
index 2bc10248b9a..7e00fa7733b 100644
--- a/libraries/stdlib/wasm/test/js/AsyncTest.kt
+++ b/libraries/stdlib/wasm/test/js/AsyncTest.kt
@@ -3,19 +3,19 @@ package test.js
 import kotlin.js.*
 import kotlin.test.*
 
-internal fun jsAsyncFoo(): Promise<Dynamic?> =
+internal fun jsAsyncFoo(): Promise<JsAny?> =
     js("(async () => 'foo')()")
 
-internal fun jsFoo(): Dynamic =
+internal fun jsFoo(): JsAny =
     js("'foo'")
 
-var state: Dynamic? = null
+var state: JsAny? = null
 
 class MyThrowable : Throwable()
 
 class AsyncTest {
     @Test
-    fun test1(): Promise<Dynamic?> {
+    fun test1(): Promise<JsAny?> {
         var thenExecuted = false
         val p = jsAsyncFoo().then { value ->
             state = value
@@ -27,7 +27,7 @@ class AsyncTest {
     }
 
     @Test
-    fun test2(): Promise<Dynamic?> {
+    fun test2(): Promise<JsAny?> {
         assertEquals(state, jsFoo())
         var thenExecuted = false
         val p = jsAsyncFoo().then {
@@ -44,10 +44,9 @@ class AsyncTest {
     }
 
     @Test
-    fun testJsValueToThrowableOrNull1(): Promise<Dynamic?> {
+    fun testJsValueToThrowableOrNull1(): Promise<JsAny?> {
         val p = jsAsyncFoo().then {
             throw MyThrowable()
-            null
         }.catch { e ->
             assert(e.toThrowableOrNull() is MyThrowable)
             null
@@ -58,6 +57,6 @@ class AsyncTest {
     @Test
     fun testJsValueToThrowableOrNull2() {
         val e = MyThrowable()
-        assertEquals((e as Dynamic).toThrowableOrNull(), e)
+        assertEquals((e.toJsHandle()).toThrowableOrNull(), e)
     }
 }
\ No newline at end of file