diff --git a/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Expect.kt b/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Expect.kt
new file mode 100644
index 0000000000..6d233e0be0
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/src/commonMain/kotlin/Expect.kt
@@ -0,0 +1,4 @@
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Composition
+
+expect fun callComposable(content: @Composable () -> Unit)
diff --git a/web/compose-compiler-integration/main-template/src/jsMain/kotlin/Deps.kt b/web/compose-compiler-integration/main-template/src/jsMain/kotlin/Deps.kt
new file mode 100644
index 0000000000..e92302047a
--- /dev/null
+++ b/web/compose-compiler-integration/main-template/src/jsMain/kotlin/Deps.kt
@@ -0,0 +1,33 @@
+import androidx.compose.runtime.*
+import kotlinx.coroutines.*
+
+class UnitApplier : Applier<Unit> {
+    override val current: Unit
+        get() = Unit
+
+    override fun down(node: Unit) {}
+    override fun up() {}
+    override fun insertTopDown(index: Int, instance: Unit) {}
+    override fun insertBottomUp(index: Int, instance: Unit) {}
+    override fun remove(index: Int, count: Int) {}
+    override fun move(from: Int, to: Int, count: Int) {}
+    override fun clear() {}
+}
+
+fun createRecomposer(): Recomposer {
+    val mainScope = CoroutineScope(
+        NonCancellable + Dispatchers.Main + DefaultMonotonicFrameClock
+    )
+
+    return Recomposer(mainScope.coroutineContext).also {
+        mainScope.launch(start = CoroutineStart.UNDISPATCHED) {
+            it.runRecomposeAndApplyChanges()
+        }
+    }
+}
+
+
+actual fun callComposable(content: @Composable () -> Unit) {
+    val c = ControlledComposition(UnitApplier(), createRecomposer())
+    c.setContent(content)
+}
diff --git a/web/compose-compiler-integration/testcases/passing/ComposableWithDefaultValuesDefinedByOtherParams.kt b/web/compose-compiler-integration/testcases/passing/ComposableWithDefaultValuesDefinedByOtherParams.kt
index 4aa2d2f9c3..30909f2236 100644
--- a/web/compose-compiler-integration/testcases/passing/ComposableWithDefaultValuesDefinedByOtherParams.kt
+++ b/web/compose-compiler-integration/testcases/passing/ComposableWithDefaultValuesDefinedByOtherParams.kt
@@ -7,18 +7,19 @@ fun main() {
     callComposable {
         ComposableWithDefaultParamsDefinedByOtherParams("a")
     }
+    require(result == "aa") { "Actual result was - $result"}
 }
 
-fun callComposable(content: @Composable () -> Unit) {
-    val c = content
-}
 
 // @Module:Lib
 import androidx.compose.runtime.Composable
 
+var result = ""
+
 @Composable
 fun ComposableWithDefaultParamsDefinedByOtherParams(
     a: String,
     b: String = a
 ) {
+    result = a + b
 }
diff --git a/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt b/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt
index 39585b16e9..857795b460 100644
--- a/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt
+++ b/web/compose-compiler-integration/testcases/passing/ComposableWithParamsWithDefaultValues.kt
@@ -15,38 +15,40 @@ fun main() {
         ComposableWithDifferentDefaultValuesForParameters(a = Any())
         ComposableWithReturnAndWithDefaultLambda().invoke()
     }
-}
-
-fun callComposable(content: @Composable () -> Unit) {
-    val c = content
+    require(intArrayOf(1, 2, 3, 4, 5, 6, 7).all { it in set }) { "Failed when running composables - ${set.joinToString()}" }
 }
 
 // @Module:Lib
 import androidx.compose.runtime.Composable
 
+var set = mutableSetOf<Int>()
+
 @Composable
-fun FooTakesLambda(block: () -> Unit = {}) {
+fun FooTakesLambda(block: () -> Unit = { set.add(1) }) {
     block()
 }
 
 @Composable
-inline fun InlineFooTakesLambda(block: () -> Unit = {}) {
+inline fun InlineFooTakesLambda(block: () -> Unit = { set.add(2) }) {
     block()
 }
 
 @Composable
-fun FooTakesComposableLambda(composable: @Composable () -> Unit = {}) {
+fun FooTakesComposableLambda(composable: @Composable () -> Unit = { set.add(3) }) {
     composable()
 }
 
 @Composable
-inline fun InlineFooTakesComposableLambda(composable: @Composable () -> Unit = {}) {
+inline fun InlineFooTakesComposableLambda(composable: @Composable () -> Unit = { set.add(4) }) {
     composable()
 }
 
 @Composable
 fun FooTakesTypedExtesionComposableLambdaWithExplicitTypesAndDefaultLambda(
-    t: String, k: Int, composable: @Composable String.(Int) -> Double = { (this + ". $it").toDouble() }
+    t: String, k: Int, composable: @Composable String.(Int) -> Double = {
+        set.add(5)
+        (this + ".$it").toDouble()
+    }
 ) {
     t.composable(k)
 }
@@ -56,12 +58,13 @@ fun ComposableWithDifferentDefaultValuesForParameters(
     a: Any, i: Int = 1, b: Boolean = false, s: String = "s",
     u: Unit = Unit, a2: Any = Any(), l: List<Any> = listOf("1")
 ) {
+    set.add(6)
     a.toString() + "$i $b $s $u $a2 $l"
 }
 
 @Composable
 fun ComposableWithReturnAndWithDefaultLambda(
-    l: @Composable () -> (@Composable () -> Unit) = { { } }
+    l: @Composable () -> (@Composable () -> Unit) = { { set.add(7) } }
 ): @Composable () -> Unit {
-    return { l() }
+    return { l().invoke() }
 }
diff --git a/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt b/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt
index 74ebf82a52..4b3c3ddc22 100644
--- a/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt
+++ b/web/compose-compiler-integration/testcases/passing/ComposableWithTypeParams.kt
@@ -1,22 +1,29 @@
 // @Module:Main
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.currentComposer
-import androidx.compose.runtime.Composer
+import androidx.compose.runtime.*
 
 fun main() {
+    var set = mutableSetOf<Int>()
     callComposable {
-
-        FooTakesTypedComposableLambda { "text" }
-        FooTakesTypedComposableLambda2(10) { it + 100 }
-        FooTakesTypedExtesionComposableLambda<String, Any, Unit>("text", Any()) { }
-        MySelect<String>(emptyList(), {})
+        FooTakesTypedComposableLambda {
+            set.add(1)
+            "text"
+        }
+        FooTakesTypedComposableLambda2(10) {
+            set.add(2)
+            it + 100
+        }
+        FooTakesTypedExtesionComposableLambda<String, Any, Unit>("text", Any()) {
+            set.add(3)
+        }
+        MySelect<String>(listOf("1")) {
+            set.add(4)
+        }
     }
-}
 
-fun callComposable(content: @Composable () -> Unit) {
-    val c = content
+    require(intArrayOf(1, 2, 3, 4).all { it in set }) { "Failed when running composables" }
 }
 
+
 // @Module:Lib
 import androidx.compose.runtime.Composable
 
@@ -41,4 +48,5 @@ fun <T> MySelect(
     options: List<T>,
     onChange: (T) -> Unit
 ) {
+    onChange(options.first())
 }
diff --git a/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt b/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt
index 998f694ddf..6366421167 100644
--- a/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt
+++ b/web/compose-compiler-integration/testcases/passing/PassingComposableToConstructor.kt
@@ -4,17 +4,19 @@
 import androidx.compose.runtime.Composable
 
 fun main() {
-    val instance = testCase {  }
+    var set = mutableSetOf<Int>()
+
+    val instance = testCase {
+        set.add(1)
+    }
     val instance2 = TestCase2()
 
     callComposable {
         instance.composable()
         instance2.composable()
+        set.add(2)
     }
-}
-
-fun callComposable(content: @Composable () -> Unit) {
-    // does nothing
+    require(intArrayOf(1, 2).all { it in set }) { "Failed when running composables" }
 }
 
 // @Module:Lib
diff --git a/web/gradle.properties b/web/gradle.properties
index 4001b68da7..5e1bd63e60 100644
--- a/web/gradle.properties
+++ b/web/gradle.properties
@@ -1,5 +1,5 @@
 # __LATEST_COMPOSE_RELEASE_VERSION__
-COMPOSE_CORE_VERSION=1.0.0-alpha4-build362
+COMPOSE_CORE_VERSION=1.0.0-rc2
 COMPOSE_WEB_VERSION=1.0.0-alpha4-build362
 compose.web.buildSamples=false
 compose.web.tests.integration.withFirefox