diff --git a/web/compose-compiler-integration/build.gradle.kts b/web/compose-compiler-integration/build.gradle.kts
index 03de875e9e..4ce8479171 100644
--- a/web/compose-compiler-integration/build.gradle.kts
+++ b/web/compose-compiler-integration/build.gradle.kts
@@ -1,3 +1,41 @@
+plugins {
+    kotlin("multiplatform")
+    id("org.jetbrains.compose")
+}
+
+
+kotlin {
+    js(IR) {
+        browser() {
+            testTask {
+                testLogging.showStandardStreams = true
+                useKarma {
+                    useChromeHeadless()
+                    useFirefox()
+                }
+            }
+        }
+        binaries.executable()
+    }
+
+    sourceSets {
+        val jsMain by getting {
+            dependencies {
+                implementation(kotlin("stdlib-js"))
+                implementation(compose.runtime)
+                implementation(project(":web-core"))
+            }
+        }
+
+        val jsTest by getting {
+            dependencies {
+                implementation(kotlin("test-js"))
+            }
+        }
+    }
+}
+
+
 fun cloneTemplate(templateName: String, contentMain: String, contentLib: String): File {
     val tempDir = file("${project.buildDir.absolutePath}/temp/cloned-$templateName")
     tempDir.deleteRecursively()
diff --git a/web/compose-compiler-integration/src/jsMain/kotlin/CrossmoduleTestsDependencies.kt b/web/compose-compiler-integration/src/jsMain/kotlin/CrossmoduleTestsDependencies.kt
new file mode 100644
index 0000000000..f0885903a5
--- /dev/null
+++ b/web/compose-compiler-integration/src/jsMain/kotlin/CrossmoduleTestsDependencies.kt
@@ -0,0 +1,88 @@
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import kotlinx.browser.document
+
+data class DataClassTakesValComposable(val c: @Composable () -> Unit)
+data class DataClassTakesValComposableTyped<T>(val c: @Composable (T) -> Unit)
+data class DataClassTakesVarComposable(var c: @Composable () -> Unit)
+
+class ClassTakesValComposable(val c: @Composable () -> Unit)
+class ClassTakesValComposableTyped<T>(val c: @Composable (T) -> Unit)
+class ClassTakesVarComposable(var c: @Composable () -> Unit)
+
+class ClassTakesComposablePrivateVal(private val c: @Composable () -> Unit) {
+
+    @Composable
+    fun callPrivateComposablePassedIntoConstructor() {
+        c()
+    }
+}
+
+
+interface HasComposable {
+    val composable: @Composable () -> Unit
+}
+
+class ImplementsHasComposable(override val composable: @Composable () -> Unit): HasComposable
+
+interface HasComposableTyped<T> {
+    val composable: @Composable (T) -> Unit
+}
+
+class ImplementsHasComposableTyped<T>(override val composable: @Composable (T) -> Unit): HasComposableTyped<T>
+
+class ClassSavesComposableIntoVar(c: @Composable () -> Unit) {
+    var composableVar: @Composable () -> Unit = c
+}
+
+class ClassSavesComposableIntoLateinitVar(c: @Composable () -> Unit) {
+    lateinit var composableVar: @Composable () -> Unit
+
+    init {
+        composableVar = c
+    }
+}
+
+class ClassSavesComposableIntoNullableVar(c: @Composable () -> Unit) {
+    var composableVar: (@Composable () -> Unit)? = null
+
+    init {
+        composableVar = c
+    }
+}
+
+class ClassSavesTypedComposableIntoVar<T>(c: @Composable (T) -> Unit) {
+    var composableVar: @Composable (T) -> Unit = c
+}
+
+
+class ClassSavesTypedComposableIntoLateinitVar<T>(c: @Composable (T) -> Unit) {
+    lateinit var composableVar: @Composable (T) -> Unit
+
+    init {
+        composableVar = c
+    }
+}
+
+class ClassWithSecondaryConstructorSavesComposable(val c: @Composable () -> Unit) {
+    constructor(): this({
+        SideEffect {
+            document.body!!.innerHTML = "Secondary constructor composable content"
+        }
+    })
+}
+
+data class DataClassTakesValStringAndComposable(
+    val s: String, val c: @Composable DataClassTakesValStringAndComposable.() -> Unit
+)
+
+class ClassTakesValStringAndComposable(
+    val s: String, val c: @Composable ClassTakesValStringAndComposable.() -> Unit
+)
+
+class ClassSavesStringAndComposableIntoVar(
+    s: String, c: @Composable ClassSavesStringAndComposableIntoVar.() -> Unit
+) {
+    var composableVar: @Composable ClassSavesStringAndComposableIntoVar.() -> Unit = c
+    var stringVar: String = s
+}
diff --git a/web/compose-compiler-integration/src/jsTest/kotlin/ComposablesInConstructorTests.kt b/web/compose-compiler-integration/src/jsTest/kotlin/ComposablesInConstructorTests.kt
new file mode 100644
index 0000000000..a9759bb77c
--- /dev/null
+++ b/web/compose-compiler-integration/src/jsTest/kotlin/ComposablesInConstructorTests.kt
@@ -0,0 +1,283 @@
+import androidx.compose.runtime.SideEffect
+import kotlinx.browser.document
+import org.jetbrains.compose.web.renderComposableInBody
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+/**
+ * Classes under tests are defined in jsMain intentionally.
+ * The reason is to test cross-module compilation + runtime behaviour.
+ *
+ * Reporeted Issues:
+ * https://github.com/JetBrains/compose-jb/issues/746
+ * https://github.com/JetBrains/compose-jb/issues/1052
+ */
+class ComposablesInConstructorTests {
+
+    @Test
+    fun valComposableInDataClass() {
+        val d = DataClassTakesValComposable {
+            SideEffect {
+                document.body!!.innerText = "DataClassTakesValComposable"
+            }
+        }
+
+        renderComposableInBody {
+            d.c()
+        }
+
+        assertEquals("DataClassTakesValComposable", document.body!!.innerText)
+    }
+
+    @Test
+    fun valTypedComposableInDataClass() {
+        val d = DataClassTakesValComposableTyped<String> {
+            SideEffect {
+                document.body!!.innerText = "DataClassTakesValComposableTyped-$it"
+            }
+        }
+
+        renderComposableInBody {
+            d.c("WORKS")
+        }
+
+        assertEquals("DataClassTakesValComposableTyped-WORKS", document.body!!.innerText)
+    }
+
+    @Test
+    fun varComposableInDataClass() {
+        val d = DataClassTakesVarComposable {
+            SideEffect {
+                document.body!!.innerText = "DataClassTakesVarComposable"
+            }
+        }
+
+        renderComposableInBody {
+            d.c()
+        }
+
+        assertEquals("DataClassTakesVarComposable", document.body!!.innerText)
+    }
+
+    @Test
+    fun valComposableInClass() {
+        val d = ClassTakesValComposable {
+            SideEffect {
+                document.body!!.innerText = "ClassTakesValComposable"
+            }
+        }
+
+        renderComposableInBody {
+            d.c()
+        }
+
+        assertEquals("ClassTakesValComposable", document.body!!.innerText)
+    }
+
+    @Test
+    fun valTypedComposableInClass() {
+        val d = ClassTakesValComposableTyped<Int> {
+            SideEffect {
+                document.body!!.innerText = "ClassTakesValComposableTyped-$it"
+            }
+        }
+
+        renderComposableInBody {
+            d.c(100500)
+        }
+
+        assertEquals("ClassTakesValComposableTyped-100500", document.body!!.innerText)
+    }
+
+    @Test
+    fun varComposableInClass() {
+        val d = ClassTakesVarComposable {
+            SideEffect {
+                document.body!!.innerText = "ClassTakesVarComposable"
+            }
+        }
+
+        renderComposableInBody {
+            d.c()
+        }
+
+        assertEquals("ClassTakesVarComposable", document.body!!.innerText)
+    }
+
+    @Test
+    fun implementsHasComposable() {
+        val d: HasComposable = ImplementsHasComposable {
+            SideEffect {
+                document.body!!.innerText = "ImplementsHasComposable"
+            }
+        }
+
+        renderComposableInBody {
+            d.composable()
+        }
+
+        assertEquals("ImplementsHasComposable", document.body!!.innerText)
+    }
+
+    @Test
+    fun implementsHasComposableTyped() {
+        val d: HasComposableTyped<Int> = ImplementsHasComposableTyped {
+            SideEffect {
+                document.body!!.innerText = "ImplementsHasComposableTyped-$it"
+            }
+        }
+
+        renderComposableInBody {
+            d.composable(123456)
+        }
+
+        assertEquals("ImplementsHasComposableTyped-123456", document.body!!.innerText)
+    }
+
+    @Test
+    fun classSavesComposableIntoVar() {
+        val d = ClassSavesComposableIntoVar {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesComposableIntoVar"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar()
+        }
+
+        assertEquals("ClassSavesComposableIntoVar", document.body!!.innerText)
+    }
+
+    @Test
+    fun classSavesComposableIntoLateinitVar() {
+        val d = ClassSavesComposableIntoLateinitVar {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesComposableIntoLateinitVar"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar()
+        }
+
+        assertEquals("ClassSavesComposableIntoLateinitVar", document.body!!.innerText)
+    }
+
+    @Test
+    fun classSavesComposableIntoNullableVar() {
+        val d = ClassSavesComposableIntoNullableVar {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesComposableIntoNullableVar"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar!!.invoke()
+        }
+
+        assertEquals("ClassSavesComposableIntoNullableVar", document.body!!.innerText)
+    }
+
+
+    @Test
+    fun classSavesTypedComposableIntoVar() {
+        val d = ClassSavesTypedComposableIntoVar<String> {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesTypedComposableIntoVar-$it"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar("ABC")
+        }
+
+        assertEquals("ClassSavesTypedComposableIntoVar-ABC", document.body!!.innerText)
+    }
+
+    @Test
+    fun classSavesTypedComposableIntoLateinitVar() {
+        val d = ClassSavesTypedComposableIntoLateinitVar<String> {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesTypedComposableIntoLateinitVar-$it"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar("ABC")
+        }
+
+        assertEquals("ClassSavesTypedComposableIntoLateinitVar-ABC", document.body!!.innerText)
+    }
+
+    @Test
+    fun classWithSecondaryConstructorSavesComposable() {
+        val d = ClassWithSecondaryConstructorSavesComposable()
+
+        renderComposableInBody {
+            d.c()
+        }
+
+        assertEquals("Secondary constructor composable content", document.body!!.innerText)
+    }
+
+    @Test
+    fun dataClassTakesValStringAndComposable() {
+        val d = DataClassTakesValStringAndComposable("String1") {
+            SideEffect {
+                document.body!!.innerText = "DataClassTakesValStringAndComposable-${this.s}"
+            }
+        }
+
+        renderComposableInBody {
+            d.c(d)
+        }
+
+        assertEquals("DataClassTakesValStringAndComposable-String1", document.body!!.innerText)
+    }
+
+    @Test
+    fun classTakesValStringAndComposable() {
+        val d = ClassTakesValStringAndComposable("123123") {
+            SideEffect {
+                document.body!!.innerText = "ClassTakesValStringAndComposable-${this.s}"
+            }
+        }
+
+        renderComposableInBody {
+            d.c(d)
+        }
+
+        assertEquals("ClassTakesValStringAndComposable-123123", document.body!!.innerText)
+    }
+
+    @Test
+    fun classSavesStringAndComposableIntoVar() {
+        val d = ClassSavesStringAndComposableIntoVar("098765") {
+            SideEffect {
+                document.body!!.innerText = "ClassSavesStringAndComposableIntoVar-${this.stringVar}"
+            }
+        }
+
+        renderComposableInBody {
+            d.composableVar(d)
+        }
+
+        assertEquals("ClassSavesStringAndComposableIntoVar-098765", document.body!!.innerText)
+    }
+
+    @Test
+    fun classTakesComposablePrivateVal() {
+        val d = ClassTakesComposablePrivateVal {
+            SideEffect {
+                document.body!!.innerText = "ClassTakesComposablePrivateVal"
+            }
+        }
+
+        renderComposableInBody {
+            d.callPrivateComposablePassedIntoConstructor()
+        }
+
+        assertEquals("ClassTakesComposablePrivateVal", document.body!!.innerText)
+    }
+}
diff --git a/web/core/src/jsTest/kotlin/FailingTestCases.kt b/web/core/src/jsTest/kotlin/FailingTestCases.kt
index 3cdc0336ab..a23fc3b022 100644
--- a/web/core/src/jsTest/kotlin/FailingTestCases.kt
+++ b/web/core/src/jsTest/kotlin/FailingTestCases.kt
@@ -24,19 +24,6 @@ class FailingTestCases {
         }
         assertTrue(expectedErrorThrown)
     }
-
-    data class DataClassTakesComposable(val c: @Composable () -> Unit)
-    class UsualClassTakesComposable(val c: @Composable () -> Unit)
-
-    @Test
-    fun passingComposableIntoConstructorOfDataClass() {
-        check(DataClassTakesComposable {}.c == null) // Expected behaviour: c != null
-    }
-
-    @Test
-    fun passingComposableIntoConstructorOfUsualClass() {
-        check(UsualClassTakesComposable {}.c == null) // Expected behaviour: c != null
-    }
 }
 
 @Suppress("Unused", "NOTHING_TO_INLINE", "NESTED_CLASS_IN_EXTERNAL_INTERFACE", "INLINE_EXTERNAL_DECLARATION", "WRONG_BODY_OF_EXTERNAL_DECLARATION", "NESTED_EXTERNAL_DECLARATION", "ClassName")