diff --git a/kotlinx-coroutines-core/common/src/CloseableCoroutineDispatcher.kt b/kotlinx-coroutines-core/common/src/CloseableCoroutineDispatcher.kt
index 239eabc4a5..2813423675 100644
--- a/kotlinx-coroutines-core/common/src/CloseableCoroutineDispatcher.kt
+++ b/kotlinx-coroutines-core/common/src/CloseableCoroutineDispatcher.kt
@@ -7,9 +7,7 @@ package kotlinx.coroutines
  * Examples of closeable dispatchers are dispatchers backed by `java.lang.Executor` and
  * by `kotlin.native.Worker`.
  */
-@OptIn(ExperimentalSubclassOptIn::class)
 @ExperimentalCoroutinesApi
-@SubclassOptInRequired(ExperimentalForInheritanceCoroutinesApi::class)
 public expect abstract class CloseableCoroutineDispatcher() : CoroutineDispatcher, AutoCloseable {
 
     /**
diff --git a/kotlinx-coroutines-core/common/src/flow/Builders.kt b/kotlinx-coroutines-core/common/src/flow/Builders.kt
index e8ed33d54f..d56666f37f 100644
--- a/kotlinx-coroutines-core/common/src/flow/Builders.kt
+++ b/kotlinx-coroutines-core/common/src/flow/Builders.kt
@@ -137,7 +137,6 @@ public fun <T> flowOf(value: T): Flow<T> = flow {
  */
 public fun <T> emptyFlow(): Flow<T> = EmptyFlow
 
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 private object EmptyFlow : Flow<Nothing> {
     override suspend fun collect(collector: FlowCollector<Nothing>) = Unit
 }
diff --git a/kotlinx-coroutines-core/common/src/flow/Flow.kt b/kotlinx-coroutines-core/common/src/flow/Flow.kt
index ac19822af6..0491c487af 100644
--- a/kotlinx-coroutines-core/common/src/flow/Flow.kt
+++ b/kotlinx-coroutines-core/common/src/flow/Flow.kt
@@ -174,7 +174,6 @@ import kotlin.coroutines.*
  * of the developer mistakes related to concurrency, inconsistent flow dispatchers, and cancellation.
  */
 @OptIn(ExperimentalSubclassOptIn::class)
-@SubclassOptInRequired(ExperimentalForInheritanceCoroutinesApi::class)
 public interface Flow<out T> {
 
     /**
@@ -220,7 +219,6 @@ public interface Flow<out T> {
  * ```
  */
 @ExperimentalCoroutinesApi
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 public abstract class AbstractFlow<T> : Flow<T>, CancellableFlow<T> {
 
     public final override suspend fun collect(collector: FlowCollector<T>) {
diff --git a/kotlinx-coroutines-core/common/src/flow/internal/ChannelFlow.kt b/kotlinx-coroutines-core/common/src/flow/internal/ChannelFlow.kt
index 2215cfe8f0..e00c1fdd61 100644
--- a/kotlinx-coroutines-core/common/src/flow/internal/ChannelFlow.kt
+++ b/kotlinx-coroutines-core/common/src/flow/internal/ChannelFlow.kt
@@ -16,7 +16,6 @@ internal fun <T> Flow<T>.asChannelFlow(): ChannelFlow<T> =
  *
  * @suppress **This an internal API and should not be used from general code.**
  */
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 @InternalCoroutinesApi
 public interface FusibleFlow<T> : Flow<T> {
     /**
diff --git a/kotlinx-coroutines-core/common/src/flow/internal/SafeCollector.common.kt b/kotlinx-coroutines-core/common/src/flow/internal/SafeCollector.common.kt
index 368ca69fb8..4e82ca65a7 100644
--- a/kotlinx-coroutines-core/common/src/flow/internal/SafeCollector.common.kt
+++ b/kotlinx-coroutines-core/common/src/flow/internal/SafeCollector.common.kt
@@ -100,7 +100,6 @@ internal tailrec fun Job?.transitiveCoroutineParent(collectJob: Job?): Job? {
  * An analogue of the [flow] builder that does not check the context of execution of the resulting flow.
  * Used in our own operators where we trust the context of invocations.
  */
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 @PublishedApi
 internal inline fun <T> unsafeFlow(@BuilderInference crossinline block: suspend FlowCollector<T>.() -> Unit): Flow<T> {
     return object : Flow<T> {
diff --git a/kotlinx-coroutines-core/common/src/flow/operators/Context.kt b/kotlinx-coroutines-core/common/src/flow/operators/Context.kt
index 9adb057f51..99e2134132 100644
--- a/kotlinx-coroutines-core/common/src/flow/operators/Context.kt
+++ b/kotlinx-coroutines-core/common/src/flow/operators/Context.kt
@@ -259,7 +259,6 @@ public fun <T> Flow<T>.cancellable(): Flow<T> =
 /**
  * Internal marker for flows that are [cancellable].
  */
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 internal interface CancellableFlow<out T> : Flow<T>
 
 /**
diff --git a/kotlinx-coroutines-core/common/src/flow/operators/Distinct.kt b/kotlinx-coroutines-core/common/src/flow/operators/Distinct.kt
index 36d40e020f..de95b45e71 100644
--- a/kotlinx-coroutines-core/common/src/flow/operators/Distinct.kt
+++ b/kotlinx-coroutines-core/common/src/flow/operators/Distinct.kt
@@ -59,7 +59,6 @@ private fun <T> Flow<T>.distinctUntilChangedBy(
     else -> DistinctFlowImpl(this, keySelector, areEquivalent)
 }
 
-@OptIn(ExperimentalForInheritanceCoroutinesApi::class)
 private class DistinctFlowImpl<T>(
     private val upstream: Flow<T>,
     @JvmField val keySelector: (T) -> Any?,
diff --git a/kotlinx-coroutines-core/jsAndWasmShared/src/CloseableCoroutineDispatcher.kt b/kotlinx-coroutines-core/jsAndWasmShared/src/CloseableCoroutineDispatcher.kt
index 0474877396..3ea73ad7a1 100644
--- a/kotlinx-coroutines-core/jsAndWasmShared/src/CloseableCoroutineDispatcher.kt
+++ b/kotlinx-coroutines-core/jsAndWasmShared/src/CloseableCoroutineDispatcher.kt
@@ -1,7 +1,5 @@
 package kotlinx.coroutines
 
-@OptIn(ExperimentalSubclassOptIn::class)
-@SubclassOptInRequired(ExperimentalForInheritanceCoroutinesApi::class)
 public actual abstract class CloseableCoroutineDispatcher actual constructor() : CoroutineDispatcher(), AutoCloseable {
     public actual abstract override fun close()
 }
diff --git a/kotlinx-coroutines-core/jvm/src/Executors.kt b/kotlinx-coroutines-core/jvm/src/Executors.kt
index 3bdd454d02..b886a285a5 100644
--- a/kotlinx-coroutines-core/jvm/src/Executors.kt
+++ b/kotlinx-coroutines-core/jvm/src/Executors.kt
@@ -15,7 +15,6 @@ import kotlin.AutoCloseable
  * asynchronous API that requires an instance of the [Executor].
  */
 @OptIn(ExperimentalSubclassOptIn::class)
-@SubclassOptInRequired(ExperimentalForInheritanceCoroutinesApi::class)
 public abstract class ExecutorCoroutineDispatcher : CoroutineDispatcher(), Closeable, AutoCloseable {
     /** @suppress */
     @ExperimentalStdlibApi
diff --git a/kotlinx-coroutines-core/native/src/CloseableCoroutineDispatcher.kt b/kotlinx-coroutines-core/native/src/CloseableCoroutineDispatcher.kt
index 0474877396..11ef089b36 100644
--- a/kotlinx-coroutines-core/native/src/CloseableCoroutineDispatcher.kt
+++ b/kotlinx-coroutines-core/native/src/CloseableCoroutineDispatcher.kt
@@ -1,7 +1,6 @@
 package kotlinx.coroutines
 
 @OptIn(ExperimentalSubclassOptIn::class)
-@SubclassOptInRequired(ExperimentalForInheritanceCoroutinesApi::class)
 public actual abstract class CloseableCoroutineDispatcher actual constructor() : CoroutineDispatcher(), AutoCloseable {
     public actual abstract override fun close()
 }