diff --git a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt
index bcbfb912fb1..fb7f0837b60 100644
--- a/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt
+++ b/compiler/ir/backend.wasm/src/org/jetbrains/kotlin/backend/wasm/ir2wasm/BodyGenerator.kt
@@ -41,6 +41,11 @@ class BodyGenerator(val context: WasmFunctionCodegenContext) : IrElementVisitorV
         error("Unexpected element of type ${element::class}")
     }
 
+    override fun visitTypeOperator(expression: IrTypeOperatorCall) {
+        require(expression.operator == IrTypeOperator.REINTERPRET_CAST) { "Other types of casts must be lowered" }
+        generateExpression(expression.argument)
+    }
+
     override fun <T> visitConst(expression: IrConst<T>) {
         when (val kind = expression.kind) {
             is IrConstKind.Null -> generateDefaultInitializerForType(context.transformType(expression.type), body)
@@ -129,10 +134,8 @@ class BodyGenerator(val context: WasmFunctionCodegenContext) : IrElementVisitorV
     override fun visitConstructorCall(expression: IrConstructorCall) {
         val klass: IrClass = expression.symbol.owner.parentAsClass
 
-        if (backendContext.inlineClassesUtils.isClassInlineLike(klass)) {
-            // Unboxed instance is just a constructor argument.
-            generateExpression(expression.getValueArgument(0)!!)
-            return
+        require(!backendContext.inlineClassesUtils.isClassInlineLike(klass)) {
+            "All inline class constructor calls must be lowered to static function calls"
         }
 
         val wasmGcType: WasmSymbol<WasmTypeDeclaration> = context.referenceGcType(klass.symbol)
diff --git a/compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt b/compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt
index f3377beced7..f225a5e7f76 100644
--- a/compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt
+++ b/compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt
@@ -1,5 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
 
 inline class IC(val i: Int) {
     init {
diff --git a/compiler/testData/codegen/box/inlineClasses/initBlock.kt b/compiler/testData/codegen/box/inlineClasses/initBlock.kt
index 8980178f1c6..30fbf49077d 100644
--- a/compiler/testData/codegen/box/inlineClasses/initBlock.kt
+++ b/compiler/testData/codegen/box/inlineClasses/initBlock.kt
@@ -1,5 +1,3 @@
-// DONT_TARGET_EXACT_BACKEND: WASM
-// WASM_MUTE_REASON: IGNORED_IN_JS
 
 inline class SingleInitBlock(val s: String) {
     init {
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java
index 2ecfbf626af..31cc5b72dd6 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java
@@ -6203,6 +6203,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/inlineClasses/boundCallableReferencePassedToInlineFunction.kt");
         }
 
+        @TestMetadata("boxImplDoesNotExecuteInitBlock.kt")
+        public void testBoxImplDoesNotExecuteInitBlock() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/boxImplDoesNotExecuteInitBlock.kt");
+        }
+
         @TestMetadata("boxNullableValueOfInlineClassWithNonNullUnderlyingType.kt")
         public void testBoxNullableValueOfInlineClassWithNonNullUnderlyingType() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/boxNullableValueOfInlineClassWithNonNullUnderlyingType.kt");
@@ -6428,6 +6433,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/inlineClasses/genericInlineClassSynthMembers.kt");
         }
 
+        @TestMetadata("initBlock.kt")
+        public void testInitBlock() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/initBlock.kt");
+        }
+
         @TestMetadata("inlineClassAsLastExpressionInInLambda.kt")
         public void testInlineClassAsLastExpressionInInLambda() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/inlineClassAsLastExpressionInInLambda.kt");