diff --git a/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.dot b/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.dot
index cc8386fe616..21ee7fbf08f 100644
--- a/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.dot
+++ b/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.dot
@@ -44,7 +44,7 @@ digraph localClassesWithImplicit_kt {
         }
         20 [label="Exit local class test"];
         21 [label="Exit anonymous object"];
-        22 [label="Variable declaration: lval x: R|anonymous|"];
+        22 [label="Variable declaration: lval x: R|<anonymous>|"];
         6 [label="Exit function test" style="filled" fillcolor=red];
     }
     5 -> {7};
@@ -284,7 +284,7 @@ digraph localClassesWithImplicit_kt {
                     99 [label="Enter block"];
                     100 [label="Access variable R|<local>/b|"];
                     101 [label="Access variable R|kotlin/String.length|"];
-                    102 [label="Function call: this@R|/anonymous|.R|/anonymous.bar|()"];
+                    102 [label="Function call: this@R|/<anonymous>|.R|/<anonymous>.bar|()"];
                     103 [label="Exit block"];
                 }
                 104 [label="Exit when branch result"];
@@ -299,7 +299,7 @@ digraph localClassesWithImplicit_kt {
     ^ when () {
         (R|<local>/b| is R|kotlin/String|) ->  {
             R|<local>/b|.R|kotlin/String.length|
-            this@R|/anonymous|.R|/anonymous.bar|()
+            this@R|/<anonymous>|.R|/<anonymous>.bar|()
         }
         else ->  {
             Int(1)
@@ -356,7 +356,7 @@ digraph localClassesWithImplicit_kt {
             122 [label="Access variable R|kotlin/String.length|"];
             123 [label="Access variable R|<local>/b|"];
             124 [label="Access variable <Unresolved name: length>#"];
-            125 [label="Function call: this@R|/anonymous|.R|/anonymous.baz|()"];
+            125 [label="Function call: this@R|/<anonymous>|.R|/<anonymous>.baz|()"];
             120 [label="Exit function anonymousFunction" style="filled" fillcolor=red];
         }
         115 [label="Postponed exit from lambda"];
@@ -364,7 +364,7 @@ digraph localClassesWithImplicit_kt {
         117 [label="Jump: ^bar R|/myRun|<R|kotlin/Int|>(<L> = myRun@fun <anonymous>(): R|kotlin/Int| <kind=UNKNOWN>  {
     R|<local>/a|.R|kotlin/String.length|
     R|<local>/b|.<Unresolved name: length>#
-    ^ this@R|/anonymous|.R|/anonymous.baz|()
+    ^ this@R|/<anonymous>|.R|/<anonymous>.baz|()
 }
 )"];
         118 [label="Stub" style="filled" fillcolor=gray];
diff --git a/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.txt b/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.txt
index fb570522aba..55b03f55ca3 100644
--- a/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/cfg/localClassesWithImplicit.txt
@@ -46,8 +46,8 @@ FILE: localClassesWithImplicit.kt
 
         }
 
-        lval x: R|anonymous| = object : R|kotlin/Any| {
-            private[local] constructor(): R|anonymous| {
+        lval x: R|<anonymous>| = object : R|kotlin/Any| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
@@ -57,7 +57,7 @@ FILE: localClassesWithImplicit.kt
                     ^ when () {
                         (R|<local>/b| is R|kotlin/String|) ->  {
                             R|<local>/b|.R|kotlin/String.length|
-                            this@R|/anonymous|.R|/anonymous.bar|()
+                            this@R|/<anonymous>|.R|/<anonymous>.bar|()
                         }
                         else ->  {
                             Int(1)
@@ -72,7 +72,7 @@ FILE: localClassesWithImplicit.kt
                 ^bar R|/myRun|<R|kotlin/Int|>(<L> = myRun@fun <anonymous>(): R|kotlin/Int| <kind=UNKNOWN>  {
                     R|<local>/a|.R|kotlin/String.length|
                     R|<local>/b|.<Unresolved name: length>#
-                    ^ this@R|/anonymous|.R|/anonymous.baz|()
+                    ^ this@R|/<anonymous>|.R|/<anonymous>.baz|()
                 }
                 )
             }
diff --git a/compiler/fir/analysis-tests/testData/resolve/enum.txt b/compiler/fir/analysis-tests/testData/resolve/enum.txt
index f3b54c518e5..35ee119e905 100644
--- a/compiler/fir/analysis-tests/testData/resolve/enum.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/enum.txt
@@ -22,7 +22,7 @@ FILE: enum.kt
             public get(): R|Some|
 
         public final static enum entry FIRST: R|SomeEnum| = object : R|SomeEnum| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|SomeEnum|>(Q|O1|)
             }
 
@@ -33,7 +33,7 @@ FILE: enum.kt
         }
 
         public final static enum entry SECOND: R|SomeEnum| = object : R|SomeEnum| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|SomeEnum|>(Q|O2|)
             }
 
@@ -71,7 +71,7 @@ FILE: enum.kt
         }
 
         public final static enum entry E1: R|EnumClass| = object : R|EnumClass| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|EnumClass|>()
             }
 
@@ -85,14 +85,14 @@ FILE: enum.kt
         }
 
         public final static enum entry E2: R|EnumClass| = object : R|EnumClass| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|EnumClass|>()
             }
 
         }
 
         public final static enum entry E3: R|EnumClass| = object : R|EnumClass| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|EnumClass|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/CallBasedInExpressionGenerator.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/CallBasedInExpressionGenerator.txt
index 71faa0653ab..d39ed186e52 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/CallBasedInExpressionGenerator.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/CallBasedInExpressionGenerator.txt
@@ -30,17 +30,17 @@ FILE: CallBasedInExpressionGenerator.kt
 
         private final fun gen(argument: R|ERROR CLASS: Symbol not found, for `StackValue`|): R|ERROR CLASS: Symbol not found, for `BranchedValue`| {
             ^gen object : R|ERROR CLASS: Symbol not found, for `BranchedValue`| {
-                private[local] constructor(): R|anonymous| {
+                private[local] constructor(): R|<anonymous>| {
                     super<R|ERROR CLASS: Symbol not found, for `BranchedValue`|>(R|<local>/argument|, Null(null), R|<local>/argument|.<Unresolved name: type>#, <Unresolved name: Opcodes>#.<Unresolved name: IFEQ>#)
                 }
 
                 public[local] final override fun putSelector(type: R|ERROR CLASS: Symbol not found, for `Type`|, kotlinType: R|ERROR CLASS: Symbol not found, for `KotlinType?`|, v: R|ERROR CLASS: Symbol not found, for `InstructionAdapter`|): R|kotlin/Unit| {
-                    this@R|/anonymous|.R|/anonymous.invokeFunction|(R|<local>/v|)
+                    this@R|/<anonymous>|.R|/<anonymous>.invokeFunction|(R|<local>/v|)
                     <Unresolved name: coerceTo>#(R|<local>/type|, R|<local>/kotlinType|, R|<local>/v|)
                 }
 
                 public[local] final override fun condJump(jumpLabel: R|ERROR CLASS: Symbol not found, for `Label`|, v: R|ERROR CLASS: Symbol not found, for `InstructionAdapter`|, jumpIfFalse: R|kotlin/Boolean|): R|kotlin/Unit| {
-                    this@R|/anonymous|.R|/anonymous.invokeFunction|(R|<local>/v|)
+                    this@R|/<anonymous>|.R|/<anonymous>.invokeFunction|(R|<local>/v|)
                     R|<local>/v|.<Unresolved name: visitJumpInsn>#(when () {
                         R|<local>/jumpIfFalse| ->  {
                             <Unresolved name: Opcodes>#.<Unresolved name: IFEQ>#
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/enumEntryUse.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/enumEntryUse.txt
index cd03048ea96..03a2eeb9259 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/enumEntryUse.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/enumEntryUse.txt
@@ -7,7 +7,7 @@ FILE: enumEntryUse.kt
         public final static enum entry FIRST: R|TestEnum|
         public final static enum entry SECOND: R|TestEnum|
         public final static enum entry THIRD: R|TestEnum| = object : R|TestEnum| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|TestEnum|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/localImplicitBodies.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/localImplicitBodies.txt
index a9d8ff6a44e..bdda8550189 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/localImplicitBodies.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/localImplicitBodies.txt
@@ -1,12 +1,12 @@
 FILE: localImplicitBodies.kt
     public final fun foo(): R|kotlin/Unit| {
-        lval x: R|anonymous| = object : R|kotlin/Any| {
-            private[local] constructor(): R|anonymous| {
+        lval x: R|<anonymous>| = object : R|kotlin/Any| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
             public[local] final fun sss(): R|kotlin/Int| {
-                ^sss this@R|/anonymous|.R|/anonymous.abc|()
+                ^sss this@R|/<anonymous>|.R|/<anonymous>.abc|()
             }
 
             public[local] final fun abc(): R|kotlin/Int| {
@@ -15,5 +15,5 @@ FILE: localImplicitBodies.kt
 
         }
 
-        lval g: R|kotlin/Int| = R|<local>/x|.R|/anonymous.sss|()
+        lval g: R|kotlin/Int| = R|<local>/x|.R|/<anonymous>.sss|()
     }
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/localInnerClass.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/localInnerClass.txt
index 7d0106776f6..a00a9704402 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/localInnerClass.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/localInnerClass.txt
@@ -3,12 +3,12 @@ FILE: localInnerClass.kt
     }
     public final fun bar(): R|kotlin/Unit| {
         object : R|Foo| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
             public[local] final fun foo(): R|Foo| {
-                ^foo this@R|/anonymous|.R|/<anonymous>.Derived.Derived|(Int(42))
+                ^foo this@R|/<anonymous>|.R|/<anonymous>.Derived.Derived|(Int(42))
             }
 
             local final inner class Derived : R|Foo| {
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/localObjects.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/localObjects.txt
index b5967df8dba..6bf10c11cd9 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/localObjects.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/localObjects.txt
@@ -20,8 +20,8 @@ FILE: localObjects.kt
     }
     public final fun test(): R|kotlin/Unit| {
         Q|A|.R|/A.x|
-        lval b: R|anonymous| = object : R|Foo| {
-            private[local] constructor(): R|anonymous| {
+        lval b: R|<anonymous>| = object : R|Foo| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Foo|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/localScopes.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/localScopes.txt
index cd9d3f195cb..b8e94125f7b 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/localScopes.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/localScopes.txt
@@ -22,8 +22,8 @@ FILE: localScopes.kt
         lval base: R|BaseLocal| = R|/BaseLocal.BaseLocal|()
         R|<local>/base|.R|/BaseLocal.baz|()
         R|<local>/base|.R|/Bar.foo|()
-        lval anonymous: R|anonymous| = object : R|Bar| {
-            private[local] constructor(): R|anonymous| {
+        lval anonymous: R|<anonymous>| = object : R|Bar| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Bar|>()
             }
 
@@ -32,7 +32,7 @@ FILE: localScopes.kt
 
         }
 
-        R|<local>/anonymous|.R|/anonymous.baz|()
+        R|<local>/anonymous|.R|/<anonymous>.baz|()
         R|<local>/anonymous|.R|/Bar.foo|()
         local final class DerivedLocal : R|BaseLocal| {
             public[local] constructor(): R|DerivedLocal| {
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/localWithBooleanNot.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/localWithBooleanNot.txt
index 8edb4faf6e4..be5ce04085c 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/localWithBooleanNot.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/localWithBooleanNot.txt
@@ -1,7 +1,7 @@
 FILE: foo.kt
     public final fun foo(): R|kotlin/Boolean| {
         object : R|Node<kotlin/Boolean>| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
@@ -10,11 +10,11 @@ FILE: foo.kt
                 private set(value: R|kotlin/Boolean|): R|kotlin/Unit|
 
             public[local] final fun bar(): R|kotlin/Boolean| {
-                ^bar this@R|/anonymous|.R|/anonymous.result|.R|kotlin/Boolean.not|()
+                ^bar this@R|/<anonymous>|.R|/<anonymous>.result|.R|kotlin/Boolean.not|()
             }
 
             public[local] final override fun result(): R|kotlin/Boolean| {
-                ^result this@R|/anonymous|.R|/anonymous.result|
+                ^result this@R|/<anonymous>|.R|/<anonymous>.result|
             }
 
         }
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/outerMemberAccesses.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/outerMemberAccesses.txt
index 6035641b94c..7394ec2470f 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/outerMemberAccesses.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/outerMemberAccesses.txt
@@ -31,8 +31,8 @@ FILE: O.kt
 
                 public[private] final fun test(): R|kotlin/Unit| {
                     lval x: R|kotlin/Int| = this@R|/O.Derived|.R|/O.Derived.bar|
-                    lval o: R|anonymous| = object : R|Wrapper| {
-                        private[local] constructor(): R|anonymous| {
+                    lval o: R|<anonymous>| = object : R|Wrapper| {
+                        private[local] constructor(): R|<anonymous>| {
                             super<R|Wrapper|>(this@R|/O.Derived.Some|.R|/O.Derived.Some.z|)
                         }
 
@@ -40,8 +40,8 @@ FILE: O.kt
                             lval y: R|ft<kotlin/String, kotlin/String?>!| = this@R|/O.Derived|.R|/Base.foo|()
                         }
 
-                        public[local] final val oo: R|anonymous| = object : R|kotlin/Any| {
-                            private[local] constructor(): R|anonymous| {
+                        public[local] final val oo: R|<anonymous>| = object : R|kotlin/Any| {
+                            private[local] constructor(): R|<anonymous>| {
                                 super<R|kotlin/Any|>()
                             }
 
@@ -50,7 +50,7 @@ FILE: O.kt
 
                         }
 
-                            public get(): R|anonymous|
+                            public get(): R|<anonymous>|
 
                     }
 
@@ -60,8 +60,8 @@ FILE: O.kt
 
             public[private] final fun test(): R|kotlin/Unit| {
                 lval x: R|kotlin/Int| = this@R|/O.Derived|.R|/O.Derived.bar|
-                lval o: R|anonymous| = object : R|kotlin/Any| {
-                    private[local] constructor(): R|anonymous| {
+                lval o: R|<anonymous>| = object : R|kotlin/Any| {
+                    private[local] constructor(): R|<anonymous>| {
                         super<R|kotlin/Any|>()
                     }
 
@@ -86,7 +86,7 @@ FILE: O.kt
 
         private final fun gen(): R|kotlin/Any| {
             ^gen object : R|Wrapper| {
-                private[local] constructor(): R|anonymous| {
+                private[local] constructor(): R|<anonymous>| {
                     super<R|Wrapper|>(Boolean(true))
                 }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/expresssions/privateObjectLiteral.txt b/compiler/fir/analysis-tests/testData/resolve/expresssions/privateObjectLiteral.txt
index 71aa1293cbe..fcdaf5083bd 100644
--- a/compiler/fir/analysis-tests/testData/resolve/expresssions/privateObjectLiteral.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/expresssions/privateObjectLiteral.txt
@@ -4,8 +4,8 @@ FILE: privateObjectLiteral.kt
             super<R|kotlin/Any|>()
         }
 
-        private final val x: R|anonymous| = object : R|kotlin/Any| {
-            private[local] constructor(): R|anonymous| {
+        private final val x: R|<anonymous>| = object : R|kotlin/Any| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
@@ -15,13 +15,13 @@ FILE: privateObjectLiteral.kt
 
         }
 
-            private get(): R|anonymous|
+            private get(): R|<anonymous>|
 
-        public final val y: R|kotlin/Int| = this@R|/C|.R|/C.x|.R|/anonymous.foo|()
+        public final val y: R|kotlin/Int| = this@R|/C|.R|/C.x|.R|/<anonymous>.foo|()
             public get(): R|kotlin/Int|
 
-        internal final val z: R|anonymous| = object : R|kotlin/Any| {
-            private[local] constructor(): R|anonymous| {
+        internal final val z: R|<anonymous>| = object : R|kotlin/Any| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
@@ -31,9 +31,9 @@ FILE: privateObjectLiteral.kt
 
         }
 
-            internal get(): R|anonymous|
+            internal get(): R|<anonymous>|
 
-        public final val w: R|kotlin/Int| = this@R|/C|.R|/C.z|.R|/anonymous.foo|()
+        public final val w: R|kotlin/Int| = this@R|/C|.R|/C.z|.R|/<anonymous>.foo|()
             public get(): R|kotlin/Int|
 
     }
diff --git a/compiler/fir/analysis-tests/testData/resolve/fromBuilder/enums.txt b/compiler/fir/analysis-tests/testData/resolve/fromBuilder/enums.txt
index b46597da1fc..88d4ec320ff 100644
--- a/compiler/fir/analysis-tests/testData/resolve/fromBuilder/enums.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/fromBuilder/enums.txt
@@ -26,7 +26,7 @@ FILE: enums.kt
             internal get(): R|kotlin/Double|
 
         public final static enum entry MERCURY: R|Planet| = object : R|Planet| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(1.0), Double(2.0))
             }
 
@@ -37,7 +37,7 @@ FILE: enums.kt
         }
 
         public final static enum entry VENERA: R|Planet| = object : R|Planet| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(3.0), Double(4.0))
             }
 
@@ -48,7 +48,7 @@ FILE: enums.kt
         }
 
         public final static enum entry EARTH: R|Planet| = object : R|Planet| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(5.0), Double(6.0))
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.txt b/compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.txt
index b1f27a077d1..4310cac8385 100644
--- a/compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/localClasses/implicitInAnonymous.txt
@@ -1,35 +1,35 @@
 FILE: implicitInAnonymous.kt
-    private final val x: R|anonymous| = object : R|kotlin/Any| {
-        private[local] constructor(): R|anonymous| {
+    private final val x: R|<anonymous>| = object : R|kotlin/Any| {
+        private[local] constructor(): R|<anonymous>| {
             super<R|kotlin/Any|>()
         }
 
         public[local] final fun foo(x: R|kotlin/Int|): R|kotlin/Boolean| {
-            ^foo this@R|/anonymous|.R|/anonymous.bar|(R|<local>/x|)
+            ^foo this@R|/<anonymous>|.R|/<anonymous>.bar|(R|<local>/x|)
         }
 
         public[local] final fun bar(y: R|kotlin/Int|): R|kotlin/Boolean| {
-            ^bar CMP(>, this@R|/anonymous|.R|kotlin/Any.hashCode|().R|kotlin/Int.plus|(R|<local>/y|).R|kotlin/Int.compareTo|(Int(0)))
+            ^bar CMP(>, this@R|/<anonymous>|.R|kotlin/Any.hashCode|().R|kotlin/Int.plus|(R|<local>/y|).R|kotlin/Int.compareTo|(Int(0)))
         }
 
         public[local] final val w: R|kotlin/Boolean|
             public get(): R|kotlin/Boolean| {
-                ^ this@R|/anonymous|.R|/anonymous.z|
+                ^ this@R|/<anonymous>|.R|/<anonymous>.z|
             }
 
         public[local] final val z: R|kotlin/Boolean|
             public get(): R|kotlin/Boolean| {
-                ^ ==(this@R|/anonymous|.R|kotlin/Any.hashCode|(), Int(0))
+                ^ ==(this@R|/<anonymous>|.R|kotlin/Any.hashCode|(), Int(0))
             }
 
     }
 
-        private get(): R|anonymous|
+        private get(): R|<anonymous>|
     public final fun useBoolean(b: R|kotlin/Boolean|): R|kotlin/Unit| {
     }
     public final fun main(): R|kotlin/Unit| {
-        R|/useBoolean|(R|/x|.R|/anonymous.foo|(Int(1)))
-        R|/useBoolean|(R|/x|.R|/anonymous.bar|(Int(2)))
-        R|/useBoolean|(R|/x|.R|/anonymous.w|)
-        R|/useBoolean|(R|/x|.R|/anonymous.z|)
+        R|/useBoolean|(R|/x|.R|/<anonymous>.foo|(Int(1)))
+        R|/useBoolean|(R|/x|.R|/<anonymous>.bar|(Int(2)))
+        R|/useBoolean|(R|/x|.R|/<anonymous>.w|)
+        R|/useBoolean|(R|/x|.R|/<anonymous>.z|)
     }
diff --git a/compiler/fir/analysis-tests/testData/resolve/localClasses/typesFromSuperClasses.txt b/compiler/fir/analysis-tests/testData/resolve/localClasses/typesFromSuperClasses.txt
index 9e96f9c55e8..16a4010319c 100644
--- a/compiler/fir/analysis-tests/testData/resolve/localClasses/typesFromSuperClasses.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/localClasses/typesFromSuperClasses.txt
@@ -12,7 +12,7 @@ FILE: typesFromSuperClasses.kt
     }
     public final fun main(): R|kotlin/Unit| {
         object : R|Outer| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Outer|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/localObject.txt b/compiler/fir/analysis-tests/testData/resolve/localObject.txt
index 09bb6419147..4e3f2183bd4 100644
--- a/compiler/fir/analysis-tests/testData/resolve/localObject.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/localObject.txt
@@ -8,8 +8,8 @@ FILE: localObject.kt
     }
     public final fun tesLambda(x: R|kotlin/Int|): R|kotlin/Int| {
         ^tesLambda R|/run|<R|kotlin/Int|>(<L> = run@fun <anonymous>(): R|kotlin/Int| {
-            lval obj: R|anonymous| = object : R|Foo| {
-                private[local] constructor(): R|anonymous| {
+            lval obj: R|<anonymous>| = object : R|Foo| {
+                private[local] constructor(): R|<anonymous>| {
                     super<R|kotlin/Any|>()
                 }
 
@@ -34,8 +34,8 @@ FILE: localObject.kt
         public final var x: R|kotlin/Int| = Int(1)
             public get(): R|kotlin/Int|
             public set(value: R|kotlin/Int|): R|kotlin/Unit| {
-                lval obj: R|anonymous| = object : R|Foo| {
-                    private[local] constructor(): R|anonymous| {
+                lval obj: R|<anonymous>| = object : R|Foo| {
+                    private[local] constructor(): R|<anonymous>| {
                         super<R|kotlin/Any|>()
                     }
 
@@ -50,8 +50,8 @@ FILE: localObject.kt
 
         public final val y: R|kotlin/Int|
             public get(): R|kotlin/Int| {
-                lval obj: R|anonymous| = object : R|Foo| {
-                    private[local] constructor(): R|anonymous| {
+                lval obj: R|<anonymous>| = object : R|Foo| {
+                    private[local] constructor(): R|<anonymous>| {
                         super<R|kotlin/Any|>()
                     }
 
@@ -65,8 +65,8 @@ FILE: localObject.kt
             }
 
         public final val z: R|kotlin/Int| = this@R|/TestProperty|.R|kotlin/run|<R|TestProperty|, R|kotlin/Int|>(<L> = run@fun R|TestProperty|.<anonymous>(): R|kotlin/Int| <kind=EXACTLY_ONCE>  {
-            lval obj: R|anonymous| = object : R|Foo| {
-                private[local] constructor(): R|anonymous| {
+            lval obj: R|<anonymous>| = object : R|Foo| {
+                private[local] constructor(): R|<anonymous>| {
                     super<R|kotlin/Any|>()
                 }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/objectInnerClass.txt b/compiler/fir/analysis-tests/testData/resolve/objectInnerClass.txt
index 637a1c92c5e..2689301c4ff 100644
--- a/compiler/fir/analysis-tests/testData/resolve/objectInnerClass.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/objectInnerClass.txt
@@ -1,12 +1,12 @@
 FILE: objectInnerClass.kt
-    public final val case1: R|anonymous| = object : R|A| {
-        private[local] constructor(): R|anonymous| {
+    public final val case1: R|<anonymous>| = object : R|A| {
+        private[local] constructor(): R|<anonymous>| {
             super<R|kotlin/Any|>()
         }
 
         local final inner class Child : R|<anonymous>.Base| {
             public[local] constructor(property: R|B|): R|<anonymous>.Child| {
-                this@R|/anonymous|.super<R|<anonymous>.Base|>(R|<local>/property|)
+                this@R|/<anonymous>|.super<R|<anonymous>.Base|>(R|<local>/property|)
             }
 
             public[local] final fun R|<anonymous>.Base|.zoo(): R|kotlin/Unit| {
@@ -17,17 +17,17 @@ FILE: objectInnerClass.kt
                 this@R|/<anonymous>.Child|.R|/<anonymous>.Base.baseFun|()
                 lval x: R|B| = this@R|/<anonymous>.Child|.R|/<anonymous>.Base.property|
                 (this@R|/<anonymous>.Child|, this@R|/<anonymous>.Child|).R|/<anonymous>.Child.zoo|()
-                (this@R|/anonymous|, this@R|/<anonymous>.Child|).R|/anonymous.hoo|()
+                (this@R|/<anonymous>|, this@R|/<anonymous>.Child|).R|/<anonymous>.hoo|()
             }
 
         }
 
         public[local] final fun R|<anonymous>.Child|.voo(): R|kotlin/Unit| {
-            lval x: R|B| = this@R|/anonymous.voo|.R|/<anonymous>.Base.property|
+            lval x: R|B| = this@R|/<anonymous>.voo|.R|/<anonymous>.Base.property|
         }
 
         public[local] final fun R|<anonymous>.Base|.hoo(): R|kotlin/Unit| {
-            lval x: R|B| = this@R|/anonymous.hoo|.R|/<anonymous>.Base.property|
+            lval x: R|B| = this@R|/<anonymous>.hoo|.R|/<anonymous>.Base.property|
         }
 
         local open inner class Base : R|kotlin/Any| {
@@ -44,48 +44,48 @@ FILE: objectInnerClass.kt
         }
 
         public[local] final fun caseForBase(): R|kotlin/Unit| {
-            lval base: R|<anonymous>.Base| = this@R|/anonymous|.R|/<anonymous>.Base.Base|(R|/B.B|())
+            lval base: R|<anonymous>.Base| = this@R|/<anonymous>|.R|/<anonymous>.Base.Base|(R|/B.B|())
             R|<local>/base|.R|/<anonymous>.Base.baseFun|()
             R|<local>/base|.R|/<anonymous>.Base.property|
-            (this@R|/anonymous|, R|<local>/base|).R|/anonymous.hoo|()
+            (this@R|/<anonymous>|, R|<local>/base|).R|/<anonymous>.hoo|()
         }
 
         public[local] final fun caseForChild(): R|kotlin/Unit| {
-            lval child: R|<anonymous>.Child| = this@R|/anonymous|.R|/<anonymous>.Child.Child|(R|/B.B|())
+            lval child: R|<anonymous>.Child| = this@R|/<anonymous>|.R|/<anonymous>.Child.Child|(R|/B.B|())
             R|<local>/child|.R|/<anonymous>.Base.baseFun|()
             R|<local>/child|.R|/<anonymous>.Base.property|
             R|<local>/child|.R|/<anonymous>.Child.foo|()
-            (this@R|/anonymous|, R|<local>/child|).R|/anonymous.hoo|()
-            (this@R|/anonymous|, R|<local>/child|).R|/anonymous.voo|()
+            (this@R|/<anonymous>|, R|<local>/child|).R|/<anonymous>.hoo|()
+            (this@R|/<anonymous>|, R|<local>/child|).R|/<anonymous>.voo|()
         }
 
     }
 
-        public get(): R|anonymous|
+        public get(): R|<anonymous>|
     public final class Case2 : R|kotlin/Any| {
         public constructor(): R|Case2| {
             super<R|kotlin/Any|>()
         }
 
-        public final val x: R|anonymous| = object : R|Case2.Base| {
-            private[local] constructor(): R|anonymous| {
+        public final val x: R|<anonymous>| = object : R|Case2.Base| {
+            private[local] constructor(): R|<anonymous>| {
                 this@R|/Case2|.super<R|Case2.Base|>(R|/B.B|())
             }
 
             public[local] final fun R|Case2.Base|.zoo(): R|kotlin/Unit| {
-                lval x: R|B| = this@R|/anonymous.zoo|.R|/Case2.Base.property|
+                lval x: R|B| = this@R|/<anonymous>.zoo|.R|/Case2.Base.property|
             }
 
             public[local] final fun foo(): R|kotlin/Unit| {
-                this@R|/anonymous|.R|/Case2.Base.baseFun|()
-                lval x: R|B| = this@R|/anonymous|.R|/Case2.Base.property|
-                (this@R|/anonymous|, this@R|/anonymous|).R|/anonymous.zoo|()
-                (this@R|/Case2|, this@R|/anonymous|).R|/Case2.hoo|()
+                this@R|/<anonymous>|.R|/Case2.Base.baseFun|()
+                lval x: R|B| = this@R|/<anonymous>|.R|/Case2.Base.property|
+                (this@R|/<anonymous>|, this@R|/<anonymous>|).R|/<anonymous>.zoo|()
+                (this@R|/Case2|, this@R|/<anonymous>|).R|/Case2.hoo|()
             }
 
         }
 
-            public get(): R|anonymous|
+            public get(): R|<anonymous>|
 
         public final fun R|Case2.Base|.hoo(): R|kotlin/Unit| {
             lval x: R|B| = this@R|/Case2.hoo|.R|/Case2.Base.property|
@@ -112,7 +112,7 @@ FILE: objectInnerClass.kt
         }
 
         public final fun caseForChild(): R|kotlin/Unit| {
-            lval child: R|anonymous| = this@R|/Case2|.R|/Case2.x|
+            lval child: R|<anonymous>| = this@R|/Case2|.R|/Case2.x|
             R|<local>/child|.R|/Case2.Base.baseFun|()
             R|<local>/child|.R|/Case2.Base.property|
             (this@R|/Case2|, R|<local>/child|).R|/Case2.hoo|()
@@ -124,14 +124,14 @@ FILE: objectInnerClass.kt
             super<R|kotlin/Any|>()
         }
 
-        public final val x: R|anonymous| = object : R|A| {
-            private[local] constructor(): R|anonymous| {
+        public final val x: R|<anonymous>| = object : R|A| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
             local final inner class Child : R|Case3.<anonymous>.Base| {
                 public[local] constructor(property: R|B|): R|Case3.<anonymous>.Child| {
-                    this@R|/anonymous|.super<R|Case3.<anonymous>.Base|>(R|<local>/property|)
+                    this@R|/<anonymous>|.super<R|Case3.<anonymous>.Base|>(R|<local>/property|)
                 }
 
                 public[local] final fun R|Case3.<anonymous>.Base|.zoo(): R|kotlin/Unit| {
@@ -142,17 +142,17 @@ FILE: objectInnerClass.kt
                     this@R|/Case3.<anonymous>.Child|.R|/Case3.<anonymous>.Base.baseFun|()
                     lval x: R|B| = this@R|/Case3.<anonymous>.Child|.R|/Case3.<anonymous>.Base.property|
                     (this@R|/Case3.<anonymous>.Child|, this@R|/Case3.<anonymous>.Child|).R|/Case3.<anonymous>.Child.zoo|()
-                    (this@R|/anonymous|, this@R|/Case3.<anonymous>.Child|).R|/anonymous.hoo|()
+                    (this@R|/<anonymous>|, this@R|/Case3.<anonymous>.Child|).R|/<anonymous>.hoo|()
                 }
 
             }
 
             public[local] final fun R|Case3.<anonymous>.Child|.voo(): R|kotlin/Unit| {
-                lval x: R|B| = this@R|/anonymous.voo|.R|/Case3.<anonymous>.Base.property|
+                lval x: R|B| = this@R|/<anonymous>.voo|.R|/Case3.<anonymous>.Base.property|
             }
 
             public[local] final fun R|Case3.<anonymous>.Base|.hoo(): R|kotlin/Unit| {
-                lval x: R|B| = this@R|/anonymous.hoo|.R|/Case3.<anonymous>.Base.property|
+                lval x: R|B| = this@R|/<anonymous>.hoo|.R|/Case3.<anonymous>.Base.property|
             }
 
             local open inner class Base : R|kotlin/Any| {
@@ -169,24 +169,24 @@ FILE: objectInnerClass.kt
             }
 
             public[local] final fun caseForBase(): R|kotlin/Unit| {
-                lval base: R|Case3.<anonymous>.Base| = this@R|/anonymous|.R|/Case3.<anonymous>.Base.Base|(R|/B.B|())
+                lval base: R|Case3.<anonymous>.Base| = this@R|/<anonymous>|.R|/Case3.<anonymous>.Base.Base|(R|/B.B|())
                 R|<local>/base|.R|/Case3.<anonymous>.Base.baseFun|()
                 R|<local>/base|.R|/Case3.<anonymous>.Base.property|
-                (this@R|/anonymous|, R|<local>/base|).R|/anonymous.hoo|()
+                (this@R|/<anonymous>|, R|<local>/base|).R|/<anonymous>.hoo|()
             }
 
             public[local] final fun caseForChild(): R|kotlin/Unit| {
-                lval child: R|Case3.<anonymous>.Child| = this@R|/anonymous|.R|/Case3.<anonymous>.Child.Child|(R|/B.B|())
+                lval child: R|Case3.<anonymous>.Child| = this@R|/<anonymous>|.R|/Case3.<anonymous>.Child.Child|(R|/B.B|())
                 R|<local>/child|.R|/Case3.<anonymous>.Base.baseFun|()
                 R|<local>/child|.R|/Case3.<anonymous>.Base.property|
                 R|<local>/child|.R|/Case3.<anonymous>.Child.foo|()
-                (this@R|/anonymous|, R|<local>/child|).R|/anonymous.hoo|()
-                (this@R|/anonymous|, R|<local>/child|).R|/anonymous.voo|()
+                (this@R|/<anonymous>|, R|<local>/child|).R|/<anonymous>.hoo|()
+                (this@R|/<anonymous>|, R|<local>/child|).R|/<anonymous>.voo|()
             }
 
         }
 
-            public get(): R|anonymous|
+            public get(): R|<anonymous>|
 
     }
     public abstract interface A : R|kotlin/Any| {
diff --git a/compiler/fir/analysis-tests/testData/resolve/problems/objectDerivedFromInnerClass.txt b/compiler/fir/analysis-tests/testData/resolve/problems/objectDerivedFromInnerClass.txt
index 6ac3a76e932..4a4f0794961 100644
--- a/compiler/fir/analysis-tests/testData/resolve/problems/objectDerivedFromInnerClass.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/problems/objectDerivedFromInnerClass.txt
@@ -13,8 +13,8 @@ FILE: objectDerivedFromInnerClass.kt
 
     }
     public final fun test(): R|kotlin/Unit| {
-        lval x: R|anonymous| = object : R|Outer.Inner| {
-            private[local] constructor(): R|anonymous| {
+        lval x: R|<anonymous>| = object : R|Outer.Inner| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|Outer.Inner|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolve/visibility/singletonConstructors.txt b/compiler/fir/analysis-tests/testData/resolve/visibility/singletonConstructors.txt
index daee35cb753..f4dc1b073f3 100644
--- a/compiler/fir/analysis-tests/testData/resolve/visibility/singletonConstructors.txt
+++ b/compiler/fir/analysis-tests/testData/resolve/visibility/singletonConstructors.txt
@@ -51,7 +51,7 @@ FILE: singletonConstructors.kt
         }
 
         public final static enum entry X: R|E| = object : R|E| {
-            private[local] constructor(): R|anonymous| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|E|>()
             }
 
diff --git a/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/anonymousInDelegate.txt b/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/anonymousInDelegate.txt
index c570c010aae..d5c4d542eeb 100644
--- a/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/anonymousInDelegate.txt
+++ b/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/anonymousInDelegate.txt
@@ -4,8 +4,8 @@ FILE: anonymousInDelegate.kt
 
     }
     public final val x: R|kotlin/Int|by R|kotlin/lazy|<R|kotlin/Int|>(<L> = lazy@fun <anonymous>(): R|kotlin/Int| {
-        lval foo: R|anonymous| = object : R|Foo| {
-            private[local] constructor(): R|anonymous| {
+        lval foo: R|<anonymous>| = object : R|Foo| {
+            private[local] constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
@@ -15,7 +15,7 @@ FILE: anonymousInDelegate.kt
 
         }
 
-        ^ R|<local>/foo|.R|/anonymous.bar|()
+        ^ R|<local>/foo|.R|/<anonymous>.bar|()
     }
     )
         public get(): R|kotlin/Int| {
diff --git a/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/delegateWithAnonymousObject.txt b/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/delegateWithAnonymousObject.txt
index 927d2dcfd25..8d4e2c1b094 100644
--- a/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/delegateWithAnonymousObject.txt
+++ b/compiler/fir/analysis-tests/testData/resolveWithStdlib/delegates/delegateWithAnonymousObject.txt
@@ -24,7 +24,7 @@ FILE: delegateWithAnonymousObject.kt
 
         public final var issueListView: R|IssueListView|by this@R|/IssuesListUserProfile|.R|/delegate|<R|IssuesListUserProfile|, R|IssuesListUserProfile|, R|IssueListView|>(<L> = delegate@fun <anonymous>(): R|kotlin/properties/ReadWriteProperty<IssuesListUserProfile, IssueListView>| {
             ^ object : R|kotlin/properties/ReadWriteProperty<IssuesListUserProfile, IssueListView>| {
-                private[local] constructor(): R|anonymous| {
+                private[local] constructor(): R|<anonymous>| {
                     super<R|kotlin/Any|>()
                 }
 
diff --git a/compiler/fir/analysis-tests/testData/resolveWithStdlib/problems.txt b/compiler/fir/analysis-tests/testData/resolveWithStdlib/problems.txt
index 373e1a00973..4be7261cdbe 100644
--- a/compiler/fir/analysis-tests/testData/resolveWithStdlib/problems.txt
+++ b/compiler/fir/analysis-tests/testData/resolveWithStdlib/problems.txt
@@ -1,8 +1,8 @@
 FILE: problems.kt
     public final val sb: R|java/lang/StringBuilder| = R|java/lang/StringBuilder.StringBuilder|()
         public get(): R|java/lang/StringBuilder|
-    public final val o: R|anonymous| = object : R|kotlin/Any| {
-        private[local] constructor(): R|anonymous| {
+    public final val o: R|<anonymous>| = object : R|kotlin/Any| {
+        private[local] constructor(): R|<anonymous>| {
             super<R|kotlin/Any|>()
         }
 
@@ -10,12 +10,12 @@ FILE: problems.kt
             public get(): R|kotlin/String|
 
         public[local] final fun test(): R|kotlin/Unit| {
-            this@R|/anonymous|.R|/anonymous.name|
+            this@R|/<anonymous>|.R|/<anonymous>.name|
         }
 
     }
 
-        public get(): R|anonymous|
+        public get(): R|<anonymous>|
     public final fun test(): R|kotlin/Unit| {
         local final class Local : R|kotlin/Any| {
             public[local] constructor(): R|Local| {
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/annotation.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/annotation.txt
index cc74045688b..14d2ce2116b 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/annotation.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/annotation.txt
@@ -30,14 +30,14 @@ FILE: annotation.kt
         }
 
         public final static enum entry FIRST: R|My| = @base() object : R|My| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|My|>()
             }
 
         }
 
         public final static enum entry SECOND: R|My| = @base() object : R|My| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|My|>()
             }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorInObject.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorInObject.txt
index a1a37c0eff3..0fb314d5dd2 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorInObject.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorInObject.txt
@@ -14,12 +14,12 @@ FILE: constructorInObject.kt
         }
 
         public final static enum entry X: R|B| = object : R|B| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|B|>()
             }
 
-            public? constructor(): R|anonymous| {
-                this<R|anonymous|>()
+            public? constructor(): R|<anonymous>| {
+                this<R|<anonymous>|>()
             }
 
         }
@@ -45,7 +45,7 @@ FILE: constructorInObject.kt
 
     }
     public? final? val anonObject: <implicit> = object : R|kotlin/Any| {
-        public? constructor(): R|anonymous| {
+        public? constructor(): R|<anonymous>| {
             super<R|kotlin/Any|>()
         }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorOfAnonymousObject.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorOfAnonymousObject.txt
index 2e4bb2b9902..84e8265bdc2 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorOfAnonymousObject.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/constructorOfAnonymousObject.txt
@@ -1,7 +1,7 @@
 FILE: constructorOfAnonymousObject.kt
     private final? fun resolveAccessorCall(suspendPropertyDescriptor: PropertyDescriptor, context: TranslationContext): ResolvedCall<PropertyDescriptor> {
         ^resolveAccessorCall object : ResolvedCall<PropertyDescriptor> {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<<implicit>>()
             }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/emptyAnonymousObject.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/emptyAnonymousObject.txt
index 84a0f198a2a..3f8ff2f506e 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/emptyAnonymousObject.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/emptyAnonymousObject.txt
@@ -1,7 +1,7 @@
 FILE: emptyAnonymousObject.kt
     public? final? fun test(): R|kotlin/Unit| {
         lval x: <implicit> = object : R|kotlin/Any| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|kotlin/Any|>()
             }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums.txt
index c251f73ba61..fcad62ee318 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums.txt
@@ -26,7 +26,7 @@ FILE: enums.kt
             internal get(): Double
 
         public final static enum entry MERCURY: R|Planet| = object : R|Planet| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(1.0), Double(2.0))
             }
 
@@ -37,7 +37,7 @@ FILE: enums.kt
         }
 
         public final static enum entry VENERA: R|Planet| = object : R|Planet| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(3.0), Double(4.0))
             }
 
@@ -48,7 +48,7 @@ FILE: enums.kt
         }
 
         public final static enum entry EARTH: R|Planet| = object : R|Planet| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|Planet|>(Double(5.0), Double(6.0))
             }
 
@@ -89,49 +89,49 @@ FILE: enums.kt
             public? get(): String
 
         public final static enum entry FIX_STACK_BEFORE_JUMP: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>()
             }
 
         }
 
         public final static enum entry FAKE_ALWAYS_TRUE_IFEQ: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>(String(()I))
             }
 
         }
 
         public final static enum entry FAKE_ALWAYS_FALSE_IFEQ: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>(String(()I))
             }
 
         }
 
         public final static enum entry SAVE_STACK_BEFORE_TRY: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>()
             }
 
         }
 
         public final static enum entry RESTORE_STACK_IN_TRY_CATCH: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>()
             }
 
         }
 
         public final static enum entry STORE_NOT_NULL: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>()
             }
 
         }
 
         public final static enum entry AS_NOT_NULL: R|PseudoInsn| = object : R|PseudoInsn| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|PseudoInsn|>(String((Ljava/lang/Object;)Ljava/lang/Object;))
             }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums2.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums2.txt
index 047594e1ec6..708f4462eee 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums2.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/enums2.txt
@@ -22,7 +22,7 @@ FILE: enums2.kt
             public? get(): Some
 
         public final static enum entry FIRST: R|SomeEnum| = object : R|SomeEnum| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|SomeEnum|>(O1#)
             }
 
@@ -33,7 +33,7 @@ FILE: enums2.kt
         }
 
         public final static enum entry SECOND: R|SomeEnum| = object : R|SomeEnum| {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<R|SomeEnum|>(O2#)
             }
 
diff --git a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/expressions/locals.txt b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/expressions/locals.txt
index a5b0e3c9215..ad51f3afe51 100644
--- a/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/expressions/locals.txt
+++ b/compiler/fir/raw-fir/psi2fir/testData/rawBuilder/expressions/locals.txt
@@ -20,7 +20,7 @@ FILE: locals.kt
         }
 
         lval code: <implicit> = object : Any {
-            private constructor(): R|anonymous| {
+            private constructor(): R|<anonymous>| {
                 super<Any>()
             }
 
diff --git a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
index e9e178c9374..11b3303bde1 100644
--- a/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
+++ b/compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt
@@ -10,6 +10,7 @@ import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.symbols.ConeClassLikeLookupTag
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
 
 sealed class FirClassLikeSymbol<D>(
     val classId: ClassId
@@ -27,7 +28,7 @@ sealed class FirClassSymbol<C : FirClass<C>>(classId: ClassId) : FirClassLikeSym
 
 class FirRegularClassSymbol(classId: ClassId) : FirClassSymbol<FirRegularClass>(classId)
 
-val ANONYMOUS_CLASS_ID = ClassId(FqName.ROOT, FqName("anonymous"), true)
+val ANONYMOUS_CLASS_ID = ClassId(FqName.ROOT, FqName.topLevel(Name.special("<anonymous>")), true)
 
 class FirAnonymousObjectSymbol : FirClassSymbol<FirAnonymousObject>(ANONYMOUS_CLASS_ID)
 
diff --git a/compiler/testData/diagnostics/tests/ObjectWithConstructor.fir.kt b/compiler/testData/diagnostics/tests/ObjectWithConstructor.fir.kt
index 9f7eaf5fbc0..963a57289f6 100644
--- a/compiler/testData/diagnostics/tests/ObjectWithConstructor.fir.kt
+++ b/compiler/testData/diagnostics/tests/ObjectWithConstructor.fir.kt
@@ -11,7 +11,7 @@ object A2 public <!CONSTRUCTOR_IN_OBJECT!>constructor(private val prop: Int)<!>
 }
 
 val x = object <!CONSTRUCTOR_IN_OBJECT!>(val prop: Int)<!> {
-    <!CONSTRUCTOR_IN_OBJECT!>constructor()<!> : <!INAPPLICABLE_CANDIDATE!>this<!>(1) {
+    <!CONSTRUCTOR_IN_OBJECT!>constructor()<!> : this(1) {
         val x = 1
         x * x
     }