diff --git a/compiler/testData/codegen/box/builtinStubMethods/mapRemove/readOnlyMap.kt b/compiler/testData/codegen/box/builtinStubMethods/mapRemove/readOnlyMap.kt
index efe33fd30ed..ec13be7d833 100644
--- a/compiler/testData/codegen/box/builtinStubMethods/mapRemove/readOnlyMap.kt
+++ b/compiler/testData/codegen/box/builtinStubMethods/mapRemove/readOnlyMap.kt
@@ -1,5 +1,4 @@
 // TODO: FirModuleDescriptor provides default builtins which filters out platform-specific functions (and defaults are considered platform-specific)
-// IGNORE_BACKEND_FIR: JVM_IR
 // SKIP_JDK6
 // TARGET_BACKEND: JVM
 // FULL_JDK
diff --git a/compiler/testData/codegen/box/fullJdk/charBuffer.kt b/compiler/testData/codegen/box/fullJdk/charBuffer.kt
index 36aead1ab9f..7d7f2702e91 100644
--- a/compiler/testData/codegen/box/fullJdk/charBuffer.kt
+++ b/compiler/testData/codegen/box/fullJdk/charBuffer.kt
@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 
 // FULL_JDK
 
diff --git a/compiler/testData/codegen/box/specialBuiltins/charBuffer.kt b/compiler/testData/codegen/box/specialBuiltins/charBuffer.kt
index 67b3655520c..a9f98930c08 100644
--- a/compiler/testData/codegen/box/specialBuiltins/charBuffer.kt
+++ b/compiler/testData/codegen/box/specialBuiltins/charBuffer.kt
@@ -1,5 +1,4 @@
 // TARGET_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // MODULE: lib
 // FILE: CharBuffer.java
 
diff --git a/compiler/testData/codegen/bytecodeText/callableReference/kt39612.kt b/compiler/testData/codegen/bytecodeText/callableReference/kt39612.kt
index f9da0cf410d..e98eb402d93 100644
--- a/compiler/testData/codegen/bytecodeText/callableReference/kt39612.kt
+++ b/compiler/testData/codegen/bytecodeText/callableReference/kt39612.kt
@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 fun foo() {}
 
 fun id(s: String) = s
diff --git a/compiler/testData/ir/irText/declarations/inlineCollectionOfInlineClass.fir.txt b/compiler/testData/ir/irText/declarations/inlineCollectionOfInlineClass.fir.txt
index 41ab54d3d36..65a0f77ef13 100644
--- a/compiler/testData/ir/irText/declarations/inlineCollectionOfInlineClass.fir.txt
+++ b/compiler/testData/ir/irText/declarations/inlineCollectionOfInlineClass.fir.txt
@@ -85,11 +85,11 @@ FILE fqName:<root> fileName:/inlineCollectionOfInlineClass.kt
               receiver: GET_VAR '<this>: <root>.InlineMutableSet declared in <root>.InlineMutableSet.<get-ms>' type=<root>.InlineMutableSet origin=null
     PROPERTY name:size visibility:public modality:FINAL [val]
       overridden:
-        public abstract size: kotlin.Int [val]
+        public abstract size: kotlin.Int [fake_override,val]
       FUN name:<get-size> visibility:public modality:FINAL <> ($this:<root>.InlineMutableSet) returnType:kotlin.Int
         correspondingProperty: PROPERTY name:size visibility:public modality:FINAL [val]
         overridden:
-          public abstract fun <get-size> (): kotlin.Int declared in kotlin.collections.Set
+          public abstract fun <get-size> (): kotlin.Int [fake_override] declared in kotlin.collections.MutableSet
         $this: VALUE_PARAMETER name:<this> type:<root>.InlineMutableSet
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public final fun <get-size> (): kotlin.Int declared in <root>.InlineMutableSet'
@@ -99,7 +99,6 @@ FILE fqName:<root> fileName:/inlineCollectionOfInlineClass.kt
     FUN name:contains visibility:public modality:FINAL <> ($this:<root>.InlineMutableSet, element:<root>.IT) returnType:kotlin.Boolean [operator]
       overridden:
         public abstract fun contains (element: E of kotlin.collections.MutableSet): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.MutableSet
-        public abstract fun contains (element: E of kotlin.collections.Set): kotlin.Boolean [operator] declared in kotlin.collections.Set
       $this: VALUE_PARAMETER name:<this> type:<root>.InlineMutableSet
       VALUE_PARAMETER name:element index:0 type:<root>.IT
       BLOCK_BODY
@@ -111,7 +110,6 @@ FILE fqName:<root> fileName:/inlineCollectionOfInlineClass.kt
     FUN name:containsAll visibility:public modality:FINAL <> ($this:<root>.InlineMutableSet, elements:kotlin.collections.Collection<<root>.IT>) returnType:kotlin.Boolean
       overridden:
         public abstract fun containsAll (elements: kotlin.collections.Collection<E of kotlin.collections.MutableSet>): kotlin.Boolean [fake_override] declared in kotlin.collections.MutableSet
-        public abstract fun containsAll (elements: kotlin.collections.Collection<E of kotlin.collections.Set>): kotlin.Boolean declared in kotlin.collections.Set
       $this: VALUE_PARAMETER name:<this> type:<root>.InlineMutableSet
       VALUE_PARAMETER name:elements index:0 type:kotlin.collections.Collection<<root>.IT>
       BLOCK_BODY
@@ -122,7 +120,7 @@ FILE fqName:<root> fileName:/inlineCollectionOfInlineClass.kt
             elements: GET_VAR 'elements: kotlin.collections.Collection<<root>.IT> declared in <root>.InlineMutableSet.containsAll' type=kotlin.collections.Collection<<root>.IT> origin=null
     FUN name:isEmpty visibility:public modality:FINAL <> ($this:<root>.InlineMutableSet) returnType:kotlin.Boolean
       overridden:
-        public abstract fun isEmpty (): kotlin.Boolean declared in kotlin.collections.Set
+        public abstract fun isEmpty (): kotlin.Boolean [fake_override] declared in kotlin.collections.MutableSet
       $this: VALUE_PARAMETER name:<this> type:<root>.InlineMutableSet
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public final fun isEmpty (): kotlin.Boolean declared in <root>.InlineMutableSet'
diff --git a/compiler/testData/ir/irText/expressions/kt30020.fir.txt b/compiler/testData/ir/irText/expressions/kt30020.fir.txt
index fe8c70f16e6..3d5a77611be 100644
--- a/compiler/testData/ir/irText/expressions/kt30020.fir.txt
+++ b/compiler/testData/ir/irText/expressions/kt30020.fir.txt
@@ -218,7 +218,7 @@ FILE fqName:<root> fileName:/kt30020.kt
       VALUE_PARAMETER name:element index:0 type:kotlin.Int
     FUN FAKE_OVERRIDE name:isEmpty visibility:public modality:ABSTRACT <> ($this:kotlin.collections.List<E of kotlin.collections.List>) returnType:kotlin.Boolean [fake_override]
       overridden:
-        public abstract fun isEmpty (): kotlin.Boolean declared in kotlin.collections.List
+        public abstract fun isEmpty (): kotlin.Boolean [fake_override] declared in kotlin.collections.MutableList
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.List<E of kotlin.collections.List>
     FUN FAKE_OVERRIDE name:iterator visibility:public modality:ABSTRACT <> ($this:kotlin.collections.MutableCollection<E of kotlin.collections.MutableCollection>) returnType:kotlin.collections.MutableIterator<kotlin.Int> [fake_override,operator]
       overridden:
@@ -235,18 +235,18 @@ FILE fqName:<root> fileName:/kt30020.kt
       FUN FAKE_OVERRIDE name:<get-size> visibility:public modality:ABSTRACT <> ($this:kotlin.collections.List<E of kotlin.collections.List>) returnType:kotlin.Int [fake_override]
         correspondingProperty: PROPERTY FAKE_OVERRIDE name:size visibility:public modality:ABSTRACT [fake_override,val]
         overridden:
-          public abstract fun <get-size> (): kotlin.Int declared in kotlin.collections.List
+          public abstract fun <get-size> (): kotlin.Int [fake_override] declared in kotlin.collections.MutableList
         $this: VALUE_PARAMETER name:<this> type:kotlin.collections.List<E of kotlin.collections.List>
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.MutableList
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.MutableList
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.MutableList
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
diff --git a/compiler/testData/ir/irText/firProblems/AbstractMutableMap.fir.txt b/compiler/testData/ir/irText/firProblems/AbstractMutableMap.fir.txt
index 6ea773daaf1..66efbd57b21 100644
--- a/compiler/testData/ir/irText/firProblems/AbstractMutableMap.fir.txt
+++ b/compiler/testData/ir/irText/firProblems/AbstractMutableMap.fir.txt
@@ -22,12 +22,10 @@ FILE fqName:<root> fileName:/AbstractMutableMap.kt
     PROPERTY name:entries visibility:public modality:FINAL [val]
       overridden:
         public abstract entries: @[FlexibleNullability] kotlin.collections.Set<@[FlexibleNullability] kotlin.collections.Map.Entry<@[FlexibleNullability] K of kotlin.collections.AbstractMutableMap?, @[FlexibleNullability] V of kotlin.collections.AbstractMutableMap?>?>? [fake_override,val]
-        public abstract entries: @[FlexibleNullability] kotlin.collections.Set<@[FlexibleNullability] kotlin.collections.Map.Entry<@[FlexibleNullability] K of java.util.AbstractMap?, @[FlexibleNullability] V of java.util.AbstractMap?>?>? [val]
       FUN name:<get-entries> visibility:public modality:FINAL <> ($this:<root>.MyMap<K of <root>.MyMap, V of <root>.MyMap>) returnType:kotlin.collections.MutableSet<kotlin.collections.MutableMap.MutableEntry<K of <root>.MyMap, V of <root>.MyMap>>
         correspondingProperty: PROPERTY name:entries visibility:public modality:FINAL [val]
         overridden:
           public abstract fun <get-entries> (): @[FlexibleNullability] kotlin.collections.Set<@[FlexibleNullability] kotlin.collections.Map.Entry<@[FlexibleNullability] K of kotlin.collections.AbstractMutableMap?, @[FlexibleNullability] V of kotlin.collections.AbstractMutableMap?>?>? [fake_override] declared in kotlin.collections.AbstractMutableMap
-          public abstract fun <get-entries> (): @[FlexibleNullability] kotlin.collections.Set<@[FlexibleNullability] kotlin.collections.Map.Entry<@[FlexibleNullability] K of java.util.AbstractMap?, @[FlexibleNullability] V of java.util.AbstractMap?>?>? declared in java.util.AbstractMap
         $this: VALUE_PARAMETER name:<this> type:<root>.MyMap<K of <root>.MyMap, V of <root>.MyMap>
         BLOCK_BODY
           RETURN type=kotlin.Nothing from='public final fun <get-entries> (): kotlin.collections.MutableSet<kotlin.collections.MutableMap.MutableEntry<K of <root>.MyMap, V of <root>.MyMap>> declared in <root>.MyMap'
diff --git a/compiler/testData/ir/irText/firProblems/ArrayMap.fir.txt b/compiler/testData/ir/irText/firProblems/ArrayMap.fir.txt
index 9ef91dce74d..c937cb8f572 100644
--- a/compiler/testData/ir/irText/firProblems/ArrayMap.fir.txt
+++ b/compiler/testData/ir/irText/firProblems/ArrayMap.fir.txt
@@ -25,16 +25,16 @@ FILE fqName:<root> fileName:/ArrayMap.kt
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Iterable<T of kotlin.collections.Iterable>
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:isEmpty visibility:public modality:FINAL <> ($receiver:<root>.ArrayMap<*>) returnType:kotlin.Boolean
     $receiver: VALUE_PARAMETER name:<this> type:<root>.ArrayMap<*>
@@ -98,7 +98,6 @@ FILE fqName:<root> fileName:/ArrayMap.kt
     FUN name:iterator visibility:public modality:FINAL <> ($this:<root>.EmptyArrayMap) returnType:kotlin.collections.Iterator<kotlin.Nothing> [operator]
       overridden:
         public abstract fun iterator (): kotlin.collections.Iterator<T of <root>.ArrayMap> [fake_override,operator] declared in <root>.ArrayMap
-        public abstract fun iterator (): kotlin.collections.Iterator<T of kotlin.collections.Iterable> [operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:<root>.EmptyArrayMap
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public final fun iterator (): kotlin.collections.Iterator<kotlin.Nothing> [operator] declared in <root>.EmptyArrayMap'
@@ -126,16 +125,16 @@ FILE fqName:<root> fileName:/ArrayMap.kt
                       CONSTRUCTOR_CALL 'public constructor <init> () declared in java.util.NoSuchElementException' type=java.util.NoSuchElementException origin=null
               FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
                 overridden:
-                  public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+                  public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
                 VALUE_PARAMETER name:other index:0 type:kotlin.Any?
               FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
                 overridden:
-                  public open fun hashCode (): kotlin.Int declared in kotlin.Any
+                  public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
               FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
                 overridden:
-                  public open fun toString (): kotlin.String declared in kotlin.Any
+                  public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
             CONSTRUCTOR_CALL 'private constructor <init> () [primary] declared in <root>.EmptyArrayMap.iterator.<no name provided>' type=<root>.EmptyArrayMap.iterator.<no name provided> origin=OBJECT_LITERAL
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
@@ -236,7 +235,6 @@ FILE fqName:<root> fileName:/ArrayMap.kt
     FUN name:iterator visibility:public modality:FINAL <> ($this:<root>.OneElementArrayMap<T of <root>.OneElementArrayMap>) returnType:kotlin.collections.Iterator<T of <root>.OneElementArrayMap> [operator]
       overridden:
         public abstract fun iterator (): kotlin.collections.Iterator<T of <root>.ArrayMap> [fake_override,operator] declared in <root>.ArrayMap
-        public abstract fun iterator (): kotlin.collections.Iterator<T of kotlin.collections.Iterable> [operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:<root>.OneElementArrayMap<T of <root>.OneElementArrayMap>
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public final fun iterator (): kotlin.collections.Iterator<T of <root>.OneElementArrayMap> [operator] declared in <root>.OneElementArrayMap'
@@ -296,16 +294,16 @@ FILE fqName:<root> fileName:/ArrayMap.kt
                         CONSTRUCTOR_CALL 'public constructor <init> () declared in java.util.NoSuchElementException' type=java.util.NoSuchElementException origin=null
               FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
                 overridden:
-                  public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+                  public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
                 VALUE_PARAMETER name:other index:0 type:kotlin.Any?
               FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
                 overridden:
-                  public open fun hashCode (): kotlin.Int declared in kotlin.Any
+                  public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
               FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
                 overridden:
-                  public open fun toString (): kotlin.String declared in kotlin.Any
+                  public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Iterator
                 $this: VALUE_PARAMETER name:<this> type:kotlin.Any
             CONSTRUCTOR_CALL 'private constructor <init> () [primary] declared in <root>.OneElementArrayMap.iterator.<no name provided>' type=<root>.OneElementArrayMap.iterator.<no name provided><T of <root>.OneElementArrayMap> origin=OBJECT_LITERAL
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
@@ -505,7 +503,6 @@ FILE fqName:<root> fileName:/ArrayMap.kt
     FUN name:iterator visibility:public modality:FINAL <> ($this:<root>.ArrayMapImpl<T of <root>.ArrayMapImpl>) returnType:kotlin.collections.Iterator<T of <root>.ArrayMapImpl> [operator]
       overridden:
         public abstract fun iterator (): kotlin.collections.Iterator<T of <root>.ArrayMap> [fake_override,operator] declared in <root>.ArrayMap
-        public abstract fun iterator (): kotlin.collections.Iterator<T of kotlin.collections.Iterable> [operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:<root>.ArrayMapImpl<T of <root>.ArrayMapImpl>
       BLOCK_BODY
         RETURN type=kotlin.Nothing from='public final fun iterator (): kotlin.collections.Iterator<T of <root>.ArrayMapImpl> [operator] declared in <root>.ArrayMapImpl'
diff --git a/compiler/testData/ir/irText/firProblems/ImplicitReceiverStack.fir.txt b/compiler/testData/ir/irText/firProblems/ImplicitReceiverStack.fir.txt
index 6f7f3ac9463..fc3300a833a 100644
--- a/compiler/testData/ir/irText/firProblems/ImplicitReceiverStack.fir.txt
+++ b/compiler/testData/ir/irText/firProblems/ImplicitReceiverStack.fir.txt
@@ -122,16 +122,16 @@ FILE fqName:<root> fileName:/ImplicitReceiverStack.kt
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Iterable<T of kotlin.collections.Iterable>
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:PersistentImplicitReceiverStack modality:FINAL visibility:public superTypes:[<root>.ImplicitReceiverStack; kotlin.collections.Iterable<<root>.ImplicitReceiverValue<*>>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.PersistentImplicitReceiverStack
@@ -183,15 +183,18 @@ FILE fqName:<root> fileName:/ImplicitReceiverStack.kt
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
         public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in <root>.ImplicitReceiverStack
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
         public open fun hashCode (): kotlin.Int [fake_override] declared in <root>.ImplicitReceiverStack
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
         public open fun toString (): kotlin.String [fake_override] declared in <root>.ImplicitReceiverStack
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Iterable
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:bar visibility:public modality:FINAL <> (s:kotlin.String) returnType:kotlin.Unit
     VALUE_PARAMETER name:s index:0 type:kotlin.String
diff --git a/compiler/testData/ir/irText/firProblems/MultiList.fir.txt b/compiler/testData/ir/irText/firProblems/MultiList.fir.txt
index fa2f6c6a565..03e50d8d777 100644
--- a/compiler/testData/ir/irText/firProblems/MultiList.fir.txt
+++ b/compiler/testData/ir/irText/firProblems/MultiList.fir.txt
@@ -160,33 +160,33 @@ FILE fqName:<root> fileName:/MultiList.kt
         $this: VALUE_PARAMETER name:<this> type:kotlin.collections.List<E of kotlin.collections.List>
     FUN FAKE_OVERRIDE name:spliterator visibility:public modality:OPEN <> ($this:kotlin.collections.Collection<E of kotlin.collections.Collection>) returnType:@[EnhancedNullability] java.util.Spliterator<@[FlexibleNullability] <root>.Some<T of <root>.MyList>?> [fake_override]
       overridden:
-        public open fun spliterator (): @[EnhancedNullability] java.util.Spliterator<@[FlexibleNullability] E of kotlin.collections.Collection?> declared in kotlin.collections.Collection
+        public open fun spliterator (): @[EnhancedNullability] java.util.Spliterator<@[FlexibleNullability] E of kotlin.collections.List?> [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Collection<E of kotlin.collections.Collection>
     FUN FAKE_OVERRIDE name:parallelStream visibility:public modality:OPEN <> ($this:kotlin.collections.Collection<E of kotlin.collections.Collection>) returnType:@[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] <root>.Some<T of <root>.MyList>?> [fake_override]
       overridden:
-        public open fun parallelStream (): @[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] E of kotlin.collections.Collection?> declared in kotlin.collections.Collection
+        public open fun parallelStream (): @[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] E of kotlin.collections.List?> [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Collection<E of kotlin.collections.Collection>
     FUN FAKE_OVERRIDE name:stream visibility:public modality:OPEN <> ($this:kotlin.collections.Collection<E of kotlin.collections.Collection>) returnType:@[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] <root>.Some<T of <root>.MyList>?> [fake_override]
       overridden:
-        public open fun stream (): @[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] E of kotlin.collections.Collection?> declared in kotlin.collections.Collection
+        public open fun stream (): @[EnhancedNullability] java.util.stream.Stream<@[FlexibleNullability] E of kotlin.collections.List?> [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Collection<E of kotlin.collections.Collection>
     FUN FAKE_OVERRIDE name:forEach visibility:public modality:OPEN <> ($this:kotlin.collections.Iterable<T of kotlin.collections.Iterable>, p0:@[FlexibleNullability] java.util.function.Consumer<in @[FlexibleNullability] <root>.Some<T of <root>.MyList>?>?) returnType:kotlin.Unit [fake_override]
       overridden:
-        public open fun forEach (p0: @[FlexibleNullability] java.util.function.Consumer<in @[FlexibleNullability] T of kotlin.collections.Iterable?>?): kotlin.Unit declared in kotlin.collections.Iterable
+        public open fun forEach (p0: @[FlexibleNullability] java.util.function.Consumer<in @[FlexibleNullability] E of kotlin.collections.List?>?): kotlin.Unit [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.collections.Iterable<T of kotlin.collections.Iterable>
       VALUE_PARAMETER name:p0 index:0 type:@[FlexibleNullability] java.util.function.Consumer<in @[FlexibleNullability] <root>.Some<T of <root>.MyList>?>?
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.List
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:SomeList modality:OPEN visibility:public superTypes:[<root>.MyList<T of <root>.SomeList>; java.util.ArrayList<<root>.Some<T of <root>.SomeList>>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.SomeList<T of <root>.SomeList>
diff --git a/compiler/testData/ir/irText/firProblems/kt43342.fir.txt b/compiler/testData/ir/irText/firProblems/kt43342.fir.txt
index ec933fe14b2..3cfa9fc0167 100644
--- a/compiler/testData/ir/irText/firProblems/kt43342.fir.txt
+++ b/compiler/testData/ir/irText/firProblems/kt43342.fir.txt
@@ -134,16 +134,16 @@ FILE fqName:<root> fileName:/kt43342.kt
               receiver: GET_VAR '<this>: <root>.ControlFlowInfo<K of <root>.ControlFlowInfo, V of <root>.ControlFlowInfo> declared in <root>.ControlFlowInfo.<get-map>' type=<root>.ControlFlowInfo<K of <root>.ControlFlowInfo, V of <root>.ControlFlowInfo> origin=null
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Map
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Map
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Map
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   CLASS CLASS name:StringFlowInfo modality:FINAL visibility:public superTypes:[<root>.ControlFlowInfo<kotlin.String, kotlin.String>]
     $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:<root>.StringFlowInfo
diff --git a/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.kt.txt b/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.kt.txt
index 93fc677192d..d183582fae8 100644
--- a/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.kt.txt
+++ b/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.kt.txt
@@ -1,4 +1,4 @@
 val test: Int
-  field = Companion.<get-MIN_VALUE>()
+  field = Companion.#MIN_VALUE
   get
 
diff --git a/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.txt b/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.txt
index 745e26fb074..4093aebcc4b 100644
--- a/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.txt
+++ b/compiler/testData/ir/irText/stubs/constFromBuiltins.fir.txt
@@ -2,8 +2,8 @@ FILE fqName:<root> fileName:/constFromBuiltins.kt
   PROPERTY name:test visibility:public modality:FINAL [val]
     FIELD PROPERTY_BACKING_FIELD name:test type:kotlin.Int visibility:private [final,static]
       EXPRESSION_BODY
-        CALL 'public final fun <get-MIN_VALUE> (): kotlin.Int declared in kotlin.Int.Companion' type=kotlin.Int origin=GET_PROPERTY
-          $this: GET_OBJECT 'CLASS IR_EXTERNAL_DECLARATION_STUB OBJECT name:Companion modality:FINAL visibility:public [companion] superTypes:[kotlin.Any]' type=kotlin.Int.Companion
+        GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:MIN_VALUE type:kotlin.Int visibility:public [final]' type=kotlin.Int origin=null
+          receiver: GET_OBJECT 'CLASS IR_EXTERNAL_DECLARATION_STUB OBJECT name:Companion modality:FINAL visibility:public [companion] superTypes:[kotlin.Any]' type=kotlin.Int.Companion
     FUN DEFAULT_PROPERTY_ACCESSOR name:<get-test> visibility:public modality:FINAL <> () returnType:kotlin.Int
       correspondingProperty: PROPERTY name:test visibility:public modality:FINAL [val]
       BLOCK_BODY
diff --git a/compiler/testData/ir/irText/types/nullChecks/implicitNotNullOnPlatformType.fir.txt b/compiler/testData/ir/irText/types/nullChecks/implicitNotNullOnPlatformType.fir.txt
index 9dc80cf7a7c..f1eb392895e 100644
--- a/compiler/testData/ir/irText/types/nullChecks/implicitNotNullOnPlatformType.fir.txt
+++ b/compiler/testData/ir/irText/types/nullChecks/implicitNotNullOnPlatformType.fir.txt
@@ -51,16 +51,16 @@ FILE fqName:<root> fileName:/implicitNotNullOnPlatformType.kt
           CALL 'public final fun TODO (): kotlin.Nothing [inline] declared in kotlin.StandardKt' type=kotlin.Nothing origin=null
     FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:kotlin.Boolean [fake_override,operator]
       overridden:
-        public open fun equals (other: kotlin.Any?): kotlin.Boolean [operator] declared in kotlin.Any
+        public open fun equals (other: kotlin.Any?): kotlin.Boolean [fake_override,operator] declared in kotlin.collections.Set
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
       VALUE_PARAMETER name:other index:0 type:kotlin.Any?
     FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.Int [fake_override]
       overridden:
-        public open fun hashCode (): kotlin.Int declared in kotlin.Any
+        public open fun hashCode (): kotlin.Int [fake_override] declared in kotlin.collections.Set
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
     FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:kotlin.String [fake_override]
       overridden:
-        public open fun toString (): kotlin.String declared in kotlin.Any
+        public open fun toString (): kotlin.String [fake_override] declared in kotlin.collections.Set
       $this: VALUE_PARAMETER name:<this> type:kotlin.Any
   FUN name:test visibility:public modality:FINAL <> () returnType:kotlin.Unit
     BLOCK_BODY