diff --git a/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt b/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
index e9a23c9d8a0..1af68e5e0bd 100644
--- a/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
+++ b/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/JasmineLikeAdapter.kt
@@ -5,7 +5,6 @@
 
 package kotlin.test
 
-import kotlin.test.FrameworkAdapter
 import kotlin.js.Promise
 
 // Need to wrap into additional lambdas so that js launcher will work without Mocha or any other testing framework
@@ -67,4 +66,27 @@ internal class JasmineLikeAdapter : FrameworkAdapter {
             }
         }
     }
-}
\ No newline at end of file
+}
+
+internal external interface ExternalFrameworkAdapter : JsAny {
+    fun suite(name: String, ignored: Boolean, suiteFn: () -> Unit)
+    fun test(name: String, ignored: Boolean, testFn: () -> JsReference<Any>?)
+}
+
+private fun createExternalJasmineLikeAdapter(
+    suiteFn: (String, Boolean, () -> Unit) -> Unit,
+    testFn: (String, Boolean, () -> JsReference<Any>?) -> Unit
+): ExternalFrameworkAdapter = js("{ return { suite: suiteFn, test: testFn } }")
+
+private class ExternalAdapterWrapper(private val externalAdapter: ExternalFrameworkAdapter) : FrameworkAdapter {
+    override fun suite(name: String, ignored: Boolean, suiteFn: () -> Unit) = externalAdapter.suite(name, ignored, suiteFn)
+    override fun test(name: String, ignored: Boolean, testFn: () -> Any?) = externalAdapter.test(name, ignored, { testFn()?.toJsReference() })
+}
+
+internal fun JasmineLikeAdapter.externalize(): ExternalFrameworkAdapter =
+    createExternalJasmineLikeAdapter(
+        suiteFn = this::suite,
+        testFn = { name, ignored, testFn -> this.test(name, ignored, { testFn()?.get() }) }
+    )
+
+internal fun ExternalFrameworkAdapter.internalize(): FrameworkAdapter = ExternalAdapterWrapper(this)
diff --git a/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/TestApi.kt b/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/TestApi.kt
index 9dc2e278d57..ed000934ab2 100644
--- a/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/TestApi.kt
+++ b/libraries/kotlin.test/wasm/js/src/main/kotlin/kotlin/test/TestApi.kt
@@ -5,6 +5,9 @@
 
 package kotlin.test
 
+private fun isJasmine(): Boolean =
+    js("typeof describe === 'function' && typeof it === 'function'")
+
 /**
  * Overrides current framework adapter with a provided instance of [FrameworkAdapter]. Use in order to support custom test frameworks.
  *
@@ -17,11 +20,28 @@ internal fun setAdapter(adapter: FrameworkAdapter) {
 
 internal var currentAdapter: FrameworkAdapter? = null
 
-private fun isJasmine(): Boolean =
-    js("typeof describe === 'function' && typeof it === 'function'")
+@JsName("kotlinTest")
+internal external val kotlinTestNamespace: ExternalKotlinTestNamespace?
+
+internal external interface ExternalKotlinTestNamespace : JsAny {
+    public val adapterTransformer: ((ExternalFrameworkAdapter) -> ExternalFrameworkAdapter)?
+}
 
 internal actual fun adapter(): FrameworkAdapter {
-    val result = currentAdapter ?: if (isJasmine()) JasmineLikeAdapter() else TeamcityAdapterWithPromiseSupport()
-    currentAdapter = result
-    return result
+    currentAdapter?.let { return it }
+
+    val adapter: FrameworkAdapter
+    if (isJasmine()) {
+        val jasmineLikeAdapter = JasmineLikeAdapter()
+        val transformer = kotlinTestNamespace?.adapterTransformer
+        if (transformer != null) {
+            adapter = transformer(jasmineLikeAdapter.externalize()).internalize()
+        } else {
+            adapter = jasmineLikeAdapter
+        }
+    } else {
+        adapter = TeamcityAdapterWithPromiseSupport()
+    }
+    currentAdapter = adapter
+    return adapter
 }
\ No newline at end of file