diff --git a/compiler/testData/codegen/box/defaultArguments/implementedByFake.kt b/compiler/testData/codegen/box/defaultArguments/implementedByFake.kt
index 3b72687973c..2dabfb4d267 100644
--- a/compiler/testData/codegen/box/defaultArguments/implementedByFake.kt
+++ b/compiler/testData/codegen/box/defaultArguments/implementedByFake.kt
@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JVM
 
 interface I<T> {
diff --git a/compiler/testData/codegen/box/defaultArguments/implementedByFake2.kt b/compiler/testData/codegen/box/defaultArguments/implementedByFake2.kt
index b6d31a9df89..cd511964c31 100644
--- a/compiler/testData/codegen/box/defaultArguments/implementedByFake2.kt
+++ b/compiler/testData/codegen/box/defaultArguments/implementedByFake2.kt
@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JVM
 
 interface I<T> {
diff --git a/compiler/testData/codegen/box/defaultArguments/implementedByFake3.kt b/compiler/testData/codegen/box/defaultArguments/implementedByFake3.kt
index d27ef2ac810..39dfc4eca33 100644
--- a/compiler/testData/codegen/box/defaultArguments/implementedByFake3.kt
+++ b/compiler/testData/codegen/box/defaultArguments/implementedByFake3.kt
@@ -1,5 +1,4 @@
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // IGNORE_BACKEND: JVM
 
 interface I<T> {
diff --git a/compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt b/compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt
new file mode 100644
index 00000000000..480152763e1
--- /dev/null
+++ b/compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt
@@ -0,0 +1,20 @@
+// !LANGUAGE: +InlineClasses
+// IGNORE_BACKEND: JVM_IR
+
+inline class IC(val x: String)
+
+interface I<T> {
+    fun foo(): T
+}
+
+interface II: I<IC>
+
+class A : I<IC> {
+    override fun foo() = IC("O")
+}
+
+class B : II {
+    override fun foo() = IC("K")
+}
+
+fun box() = A().foo().x + B().foo().x
diff --git a/compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt b/compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt
new file mode 100644
index 00000000000..6554d74537c
--- /dev/null
+++ b/compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt
@@ -0,0 +1,49 @@
+// !LANGUAGE: +InlineClasses
+// IGNORE_BACKEND: JVM_IR
+
+inline class IC(val x: Int)
+
+interface I<T> {
+    fun foo(t: T): T
+}
+
+interface I2: I<IC>
+
+open class A<T> {
+    fun foo(t: T): T =
+        if (t is IC)
+            IC(20 + t.x) as T
+        else
+            t
+}
+
+open class B: A<IC>()
+class C: I2, B()
+
+fun box(): String {
+    val ic = IC(10)
+    val i: I<IC> = C()
+    val i2: I2 = C()
+    val a: A<IC> = C()
+    val b: B = C()
+    val c: C = C()
+
+    val fooI = i.foo(ic).x
+    if (fooI != 30) return "Fail I"
+
+    // Test calling abstract fake override methods
+    // with signature specialized by inline class
+    val fooI2 = i2.foo(ic).x
+    if (fooI2 != 30) return "Fail I2"
+
+    val fooA = a.foo(ic).x
+    if (fooA != 30) return "Fail A"
+
+    val fooB = b.foo(ic).x
+    if (fooB != 30) return "Fail B"
+
+    val resC = c.foo(ic).x
+    if (resC != 30) return "Fail C"
+
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt b/compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt
new file mode 100644
index 00000000000..b7cca19cf76
--- /dev/null
+++ b/compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt
@@ -0,0 +1,33 @@
+// !LANGUAGE: +InlineClasses
+// IGNORE_BACKEND: JVM_IR
+
+inline class IC(val x: Int)
+
+abstract class A<T> {
+    var t: T? = null
+    final fun foo(): T = t!!
+}
+
+class B: A<IC>()
+
+interface I {
+    fun foo(): IC
+}
+
+class B2: A<IC>(), I
+
+
+fun box(): String {
+    val b = B()
+    b.t = IC(10)
+    if (b.foo() != IC(10)) return "Fail 1"
+
+    val b2 = B2()
+    b2.t = IC(10)
+    if (b2.foo() != IC(10)) return "Fail 2"
+
+    val b2i: I = b2
+    if (b2i.foo() != IC(10)) return "Fail 3"
+
+    return "OK"
+}
diff --git a/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceExtensionFunCall.kt b/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceExtensionFunCall.kt
index a3820aad7db..c5937547f12 100644
--- a/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceExtensionFunCall.kt
+++ b/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceExtensionFunCall.kt
@@ -1,5 +1,5 @@
 // !LANGUAGE: +InlineClasses
-// IGNORE_BACKEND: JVM_IR, JS_IR
+// IGNORE_BACKEND: JVM_IR
 
 interface IFoo<T : IFoo<T>> {
     fun T.foo(): String = bar()
diff --git a/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceMethodCall.kt b/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceMethodCall.kt
index f89669fb38b..c210b31e867 100644
--- a/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceMethodCall.kt
+++ b/compiler/testData/codegen/box/inlineClasses/interfaceMethodCalls/genericDefaultInterfaceMethodCall.kt
@@ -1,5 +1,5 @@
 // !LANGUAGE: +InlineClasses
-// IGNORE_BACKEND: JVM_IR, JS_IR
+// IGNORE_BACKEND: JVM_IR
 
 interface IFoo<T : IFoo<T>> {
     fun foo(t: T): String = t.bar()
diff --git a/compiler/testData/codegen/box/inlineClasses/kt27132.kt b/compiler/testData/codegen/box/inlineClasses/kt27132.kt
index 6b0dde3545c..d41f580cae0 100644
--- a/compiler/testData/codegen/box/inlineClasses/kt27132.kt
+++ b/compiler/testData/codegen/box/inlineClasses/kt27132.kt
@@ -1,6 +1,5 @@
 // !LANGUAGE: +InlineClasses
 // IGNORE_BACKEND: JVM_IR
-// IGNORE_BACKEND: JS_IR
 // WITH_RUNTIME
 
 inline class Ucn(private val i: UInt)
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
index 641207cb83e..b9dd1c3e7ac 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java
@@ -11803,6 +11803,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/inlineClasses/boxUnboxOfInlineClassForCapturedVars.kt");
         }
 
+        @TestMetadata("bridgeForFunctionReturningInlineClass.kt")
+        public void testBridgeForFunctionReturningInlineClass() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt");
+        }
+
         @TestMetadata("bridgeGenerationWithInlineClassOverAny.kt")
         public void testBridgeGenerationWithInlineClassOverAny() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/bridgeGenerationWithInlineClassOverAny.kt");
@@ -11848,6 +11853,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingAfterAssertionOperator.kt");
         }
 
+        @TestMetadata("checkBoxingForComplexClassHierarchy.kt")
+        public void testCheckBoxingForComplexClassHierarchy() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt");
+        }
+
         @TestMetadata("checkBoxingForNonLocalAndLabeledReturns.kt")
         public void testCheckBoxingForNonLocalAndLabeledReturns() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForNonLocalAndLabeledReturns.kt");
@@ -11868,6 +11878,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingOnLocalVariableAssignments.kt");
         }
 
+        @TestMetadata("checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt")
+        public void testCheckBoxingUnboxingForInheritedTypeSpecializedFunctions() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt");
+        }
+
         @TestMetadata("checkCallingMembersInsideInlineClass.kt")
         public void testCheckCallingMembersInsideInlineClass() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkCallingMembersInsideInlineClass.kt");
diff --git a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
index 560b557b3d1..dafe58465c3 100644
--- a/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
+++ b/compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java
@@ -11808,6 +11808,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/inlineClasses/boxUnboxOfInlineClassForCapturedVars.kt");
         }
 
+        @TestMetadata("bridgeForFunctionReturningInlineClass.kt")
+        public void testBridgeForFunctionReturningInlineClass() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt");
+        }
+
         @TestMetadata("bridgeGenerationWithInlineClassOverAny.kt")
         public void testBridgeGenerationWithInlineClassOverAny() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/bridgeGenerationWithInlineClassOverAny.kt");
@@ -11853,6 +11858,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingAfterAssertionOperator.kt");
         }
 
+        @TestMetadata("checkBoxingForComplexClassHierarchy.kt")
+        public void testCheckBoxingForComplexClassHierarchy() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt");
+        }
+
         @TestMetadata("checkBoxingForNonLocalAndLabeledReturns.kt")
         public void testCheckBoxingForNonLocalAndLabeledReturns() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForNonLocalAndLabeledReturns.kt");
@@ -11873,6 +11883,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingOnLocalVariableAssignments.kt");
         }
 
+        @TestMetadata("checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt")
+        public void testCheckBoxingUnboxingForInheritedTypeSpecializedFunctions() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt");
+        }
+
         @TestMetadata("checkCallingMembersInsideInlineClass.kt")
         public void testCheckCallingMembersInsideInlineClass() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkCallingMembersInsideInlineClass.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrJsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrJsCodegenBoxTestGenerated.java
index 98532b84fd7..eebcedaef57 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrJsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/IrJsCodegenBoxTestGenerated.java
@@ -9453,6 +9453,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/boxUnboxOfInlineClassForCapturedVars.kt");
         }
 
+        @TestMetadata("bridgeForFunctionReturningInlineClass.kt")
+        public void testBridgeForFunctionReturningInlineClass() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt");
+        }
+
         @TestMetadata("bridgeGenerationWithInlineClassOverAny.kt")
         public void testBridgeGenerationWithInlineClassOverAny() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/bridgeGenerationWithInlineClassOverAny.kt");
@@ -9488,6 +9493,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingAfterAssertionOperator.kt");
         }
 
+        @TestMetadata("checkBoxingForComplexClassHierarchy.kt")
+        public void testCheckBoxingForComplexClassHierarchy() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt");
+        }
+
         @TestMetadata("checkBoxingForNonLocalAndLabeledReturns.kt")
         public void testCheckBoxingForNonLocalAndLabeledReturns() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForNonLocalAndLabeledReturns.kt");
@@ -9508,6 +9518,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingOnLocalVariableAssignments.kt");
         }
 
+        @TestMetadata("checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt")
+        public void testCheckBoxingUnboxingForInheritedTypeSpecializedFunctions() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt");
+        }
+
         @TestMetadata("checkCallingMembersInsideInlineClass.kt")
         public void testCheckCallingMembersInsideInlineClass() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkCallingMembersInsideInlineClass.kt");
diff --git a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
index 2816c2b8d80..73dd72e1de6 100644
--- a/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
+++ b/js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java
@@ -10503,6 +10503,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/boxUnboxOfInlineClassForCapturedVars.kt");
         }
 
+        @TestMetadata("bridgeForFunctionReturningInlineClass.kt")
+        public void testBridgeForFunctionReturningInlineClass() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/bridgeForFunctionReturningInlineClass.kt");
+        }
+
         @TestMetadata("bridgeGenerationWithInlineClassOverAny.kt")
         public void testBridgeGenerationWithInlineClassOverAny() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/bridgeGenerationWithInlineClassOverAny.kt");
@@ -10538,6 +10543,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingAfterAssertionOperator.kt");
         }
 
+        @TestMetadata("checkBoxingForComplexClassHierarchy.kt")
+        public void testCheckBoxingForComplexClassHierarchy() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForComplexClassHierarchy.kt");
+        }
+
         @TestMetadata("checkBoxingForNonLocalAndLabeledReturns.kt")
         public void testCheckBoxingForNonLocalAndLabeledReturns() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingForNonLocalAndLabeledReturns.kt");
@@ -10558,6 +10568,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingOnLocalVariableAssignments.kt");
         }
 
+        @TestMetadata("checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt")
+        public void testCheckBoxingUnboxingForInheritedTypeSpecializedFunctions() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/checkBoxingUnboxingForInheritedTypeSpecializedFunctions.kt");
+        }
+
         @TestMetadata("checkCallingMembersInsideInlineClass.kt")
         public void testCheckCallingMembersInsideInlineClass() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/checkCallingMembersInsideInlineClass.kt");
diff --git a/js/js.translator/testData/box/native/overrideNativeOverloadedFunction.kt b/js/js.translator/testData/box/native/overrideNativeOverloadedFunction.kt
index 5b643822b25..3221b24603c 100644
--- a/js/js.translator/testData/box/native/overrideNativeOverloadedFunction.kt
+++ b/js/js.translator/testData/box/native/overrideNativeOverloadedFunction.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND: JS_IR
 // EXPECTED_REACHABLE_NODES: 1304
 external open class A {
     open fun f(x: Int): String = definedExternally