diff --git a/compiler/fir/plugins/allopen-plugin/src/org/jetbrains/kotlin/fir/allopen/AllOpenStatusTransformer.kt b/compiler/fir/plugins/allopen-plugin/src/org/jetbrains/kotlin/fir/allopen/AllOpenStatusTransformer.kt
index 5edc52f686f..d39a00e7170 100644
--- a/compiler/fir/plugins/allopen-plugin/src/org/jetbrains/kotlin/fir/allopen/AllOpenStatusTransformer.kt
+++ b/compiler/fir/plugins/allopen-plugin/src/org/jetbrains/kotlin/fir/allopen/AllOpenStatusTransformer.kt
@@ -9,12 +9,22 @@ import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
 import org.jetbrains.kotlin.fir.declarations.FirDeclarationStatus
+import org.jetbrains.kotlin.fir.extensions.AnnotationFqn
 import org.jetbrains.kotlin.fir.extensions.FirStatusTransformerExtension
 import org.jetbrains.kotlin.fir.extensions.transform
+import org.jetbrains.kotlin.name.FqName
 
 class AllOpenStatusTransformer(session: FirSession) : FirStatusTransformerExtension(session) {
     override fun transformStatus(declaration: FirDeclaration, status: FirDeclarationStatus): FirDeclarationStatus {
         if (status.modality != null) return status
         return status.transform(modality = Modality.OPEN)
     }
+
+    override val mode: Mode
+        get() = Mode.ALL_IN_ANNOTATED_ELEMENT
+
+    override val annotations: Set<AnnotationFqn> = setOf(FqName.fromSegments(listOf("allopen", "Open")))
+
+    override val metaAnnotations: Set<AnnotationFqn>
+        get() = emptySet()
 }
\ No newline at end of file
diff --git a/compiler/fir/plugins/allopen-plugin/testData/simple.kt b/compiler/fir/plugins/allopen-plugin/testData/simple.kt
index 937bd90c2bc..24cd76b2dbb 100644
--- a/compiler/fir/plugins/allopen-plugin/testData/simple.kt
+++ b/compiler/fir/plugins/allopen-plugin/testData/simple.kt
@@ -1,9 +1,21 @@
+// FILE: annotations.kt
+
+package allopen
+
+annotation class Open
+
+// FILE: main.kt
+
+import allopen.Open
+
+@Open
 class A {
     fun foo() {
 
     }
 }
 
+@Open
 class B : A() {
     override fun foo() {
 
diff --git a/compiler/fir/plugins/allopen-plugin/testData/simple.txt b/compiler/fir/plugins/allopen-plugin/testData/simple.txt
index d210cb2d98e..d5486510959 100644
--- a/compiler/fir/plugins/allopen-plugin/testData/simple.txt
+++ b/compiler/fir/plugins/allopen-plugin/testData/simple.txt
@@ -1,5 +1,12 @@
-FILE: simple.kt
-    public open class A : R|kotlin/Any| {
+FILE: annotations.kt
+    public final annotation class Open : R|kotlin/Annotation| {
+        public constructor(): R|allopen/Open| {
+            super<R|kotlin/Any|>()
+        }
+
+    }
+FILE: main.kt
+    @R|allopen/Open|() public open class A : R|kotlin/Any| {
         public constructor(): R|A| {
             super<R|kotlin/Any|>()
         }
@@ -8,7 +15,7 @@ FILE: simple.kt
         }
 
     }
-    public open class B : R|A| {
+    @R|allopen/Open|() public open class B : R|A| {
         public constructor(): R|B| {
             super<R|A|>()
         }