diff --git a/library/src-bootstrapped/scala/annotation/experimental.scala b/library/src-bootstrapped/scala/annotation/experimental.scala
index 185db51c07c1..634cfe12db7f 100644
--- a/library/src-bootstrapped/scala/annotation/experimental.scala
+++ b/library/src-bootstrapped/scala/annotation/experimental.scala
@@ -5,6 +5,5 @@ package scala.annotation
  *  @see [[https://dotty.epfl.ch/docs/reference/other-new-features/experimental-defs]]
  *  @syntax markdown
  */
-@deprecatedInheritance("Scheduled for being final in the future", "3.4.0")
-class experimental(message: String) extends StaticAnnotation:
+final class experimental(message: String) extends StaticAnnotation:
   def this() = this("")
diff --git a/library/src-non-bootstrapped/scala/annotation/experimental.scala b/library/src-non-bootstrapped/scala/annotation/experimental.scala
index dbc3296aa1ab..e879b47e12ff 100644
--- a/library/src-non-bootstrapped/scala/annotation/experimental.scala
+++ b/library/src-non-bootstrapped/scala/annotation/experimental.scala
@@ -1,4 +1,3 @@
 package scala.annotation
 
-@deprecatedInheritance("Scheduled for being final in the future", "3.4.0")
-class experimental extends StaticAnnotation
+final class experimental extends StaticAnnotation
diff --git a/project/MiMaFilters.scala b/project/MiMaFilters.scala
index 904367d15ecd..cc0da889620f 100644
--- a/project/MiMaFilters.scala
+++ b/project/MiMaFilters.scala
@@ -56,6 +56,8 @@ object MiMaFilters {
           ProblemFilters.exclude[ReversedMissingMethodProblem]("scala.quoted.Quotes#reflectModule#MethodTypeModule.apply"),
           ProblemFilters.exclude[ReversedMissingMethodProblem]("scala.quoted.Quotes#reflectModule#MethodTypeMethods.methodTypeKind"),
           ProblemFilters.exclude[ReversedMissingMethodProblem]("scala.quoted.Quotes#reflectModule#MethodTypeMethods.isContextual"),
+          // Change `experimental` annotation to a final class
+          ProblemFilters.exclude[FinalClassProblem]("scala.annotation.experimental"),
         ),
 
       // Breaking changes since last LTS
diff --git a/tests/neg/experimentalExperimental.scala b/tests/neg/experimentalExperimental.scala
new file mode 100644
index 000000000000..9011a3e49225
--- /dev/null
+++ b/tests/neg/experimentalExperimental.scala
@@ -0,0 +1 @@
+class MyExperimentalAnnot extends scala.annotation.experimental // error
diff --git a/tests/pos/experimentalExperimental.scala b/tests/pos/experimentalExperimental.scala
deleted file mode 100644
index 4b57e5b94346..000000000000
--- a/tests/pos/experimentalExperimental.scala
+++ /dev/null
@@ -1 +0,0 @@
-class MyExperimentalAnnot extends scala.annotation.experimental