diff --git a/gradle/libraries.toml b/gradle/libraries.toml
index 52a9f842333..be2f32c0198 100644
--- a/gradle/libraries.toml
+++ b/gradle/libraries.toml
@@ -24,7 +24,7 @@ guava = "31.1-jre"
 javaPoet = "1.13.0"
 jetbrains-annotations = "24.0.1"
 junit = "4.13.2"
-kotlin-plugin-min = "1.8.0"
+kotlin-plugin-min = "1.9.0"
 kotlin-plugin = "2.0.0-RC3"
 kotlin-plugin-max = "2.0.0-RC3"
 kotlin-stdlib = "2.0.0-RC3"
diff --git a/libraries/apollo-api/api/apollo-api.api b/libraries/apollo-api/api/apollo-api.api
index 81b34533310..5a7173abbca 100644
--- a/libraries/apollo-api/api/apollo-api.api
+++ b/libraries/apollo-api/api/apollo-api.api
@@ -630,9 +630,6 @@ public final class com/apollographql/apollo3/api/FileUpload {
 }
 
 public abstract interface class com/apollographql/apollo3/api/Fragment : com/apollographql/apollo3/api/Executable {
-	public abstract fun adapter ()Lcom/apollographql/apollo3/api/Adapter;
-	public abstract fun rootField ()Lcom/apollographql/apollo3/api/CompiledField;
-	public abstract fun serializeVariables (Lcom/apollographql/apollo3/api/json/JsonWriter;Lcom/apollographql/apollo3/api/CustomScalarAdapters;Z)V
 }
 
 public abstract interface class com/apollographql/apollo3/api/Fragment$Data : com/apollographql/apollo3/api/Executable$Data {
@@ -773,12 +770,9 @@ public final class com/apollographql/apollo3/api/ObjectType$Builder {
 }
 
 public abstract interface class com/apollographql/apollo3/api/Operation : com/apollographql/apollo3/api/Executable {
-	public abstract fun adapter ()Lcom/apollographql/apollo3/api/Adapter;
 	public abstract fun document ()Ljava/lang/String;
 	public abstract fun id ()Ljava/lang/String;
 	public abstract fun name ()Ljava/lang/String;
-	public abstract fun rootField ()Lcom/apollographql/apollo3/api/CompiledField;
-	public abstract fun serializeVariables (Lcom/apollographql/apollo3/api/json/JsonWriter;Lcom/apollographql/apollo3/api/CustomScalarAdapters;Z)V
 }
 
 public abstract interface class com/apollographql/apollo3/api/Operation$Data : com/apollographql/apollo3/api/Executable$Data {
diff --git a/libraries/apollo-api/api/apollo-api.klib.api b/libraries/apollo-api/api/apollo-api.klib.api
index 16655d532af..1cce1b1b440 100644
--- a/libraries/apollo-api/api/apollo-api.klib.api
+++ b/libraries/apollo-api/api/apollo-api.klib.api
@@ -51,21 +51,15 @@ abstract interface <#A: com.apollographql.apollo3.api/Executable.Data> com.apoll
     }
 }
 abstract interface <#A: com.apollographql.apollo3.api/Fragment.Data> com.apollographql.apollo3.api/Fragment : com.apollographql.apollo3.api/Executable<#A> { // com.apollographql.apollo3.api/Fragment|null[0]
-    abstract fun adapter(): com.apollographql.apollo3.api/Adapter<#A> // com.apollographql.apollo3.api/Fragment.adapter|adapter(){}[0]
-    abstract fun rootField(): com.apollographql.apollo3.api/CompiledField // com.apollographql.apollo3.api/Fragment.rootField|rootField(){}[0]
-    abstract fun serializeVariables(com.apollographql.apollo3.api.json/JsonWriter, com.apollographql.apollo3.api/CustomScalarAdapters, kotlin/Boolean) // com.apollographql.apollo3.api/Fragment.serializeVariables|serializeVariables(com.apollographql.apollo3.api.json.JsonWriter;com.apollographql.apollo3.api.CustomScalarAdapters;kotlin.Boolean){}[0]
     abstract interface Data : com.apollographql.apollo3.api/Executable.Data // com.apollographql.apollo3.api/Fragment.Data|null[0]
 }
 abstract interface <#A: com.apollographql.apollo3.api/Mutation.Data> com.apollographql.apollo3.api/Mutation : com.apollographql.apollo3.api/Operation<#A> { // com.apollographql.apollo3.api/Mutation|null[0]
     abstract interface Data : com.apollographql.apollo3.api/Operation.Data // com.apollographql.apollo3.api/Mutation.Data|null[0]
 }
 abstract interface <#A: com.apollographql.apollo3.api/Operation.Data> com.apollographql.apollo3.api/Operation : com.apollographql.apollo3.api/Executable<#A> { // com.apollographql.apollo3.api/Operation|null[0]
-    abstract fun adapter(): com.apollographql.apollo3.api/Adapter<#A> // com.apollographql.apollo3.api/Operation.adapter|adapter(){}[0]
     abstract fun document(): kotlin/String // com.apollographql.apollo3.api/Operation.document|document(){}[0]
     abstract fun id(): kotlin/String // com.apollographql.apollo3.api/Operation.id|id(){}[0]
     abstract fun name(): kotlin/String // com.apollographql.apollo3.api/Operation.name|name(){}[0]
-    abstract fun rootField(): com.apollographql.apollo3.api/CompiledField // com.apollographql.apollo3.api/Operation.rootField|rootField(){}[0]
-    abstract fun serializeVariables(com.apollographql.apollo3.api.json/JsonWriter, com.apollographql.apollo3.api/CustomScalarAdapters, kotlin/Boolean) // com.apollographql.apollo3.api/Operation.serializeVariables|serializeVariables(com.apollographql.apollo3.api.json.JsonWriter;com.apollographql.apollo3.api.CustomScalarAdapters;kotlin.Boolean){}[0]
     abstract interface Data : com.apollographql.apollo3.api/Executable.Data // com.apollographql.apollo3.api/Operation.Data|null[0]
 }
 abstract interface <#A: com.apollographql.apollo3.api/Query.Data> com.apollographql.apollo3.api/Query : com.apollographql.apollo3.api/Operation<#A> { // com.apollographql.apollo3.api/Query|null[0]
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Fragment.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Fragment.kt
index 4cbe9dc7536..31a49a04e1d 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Fragment.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Fragment.kt
@@ -1,21 +1,11 @@
 package com.apollographql.apollo3.api
 
-import com.apollographql.apollo3.api.json.JsonWriter
-import okio.IOException
-
 /**
  * Base interface for a fragment implementation.
  * Fragments do not have variables per the GraphQL spec but they are inferred from arguments and used when reading the cache
  * See https://github.com/graphql/graphql-spec/issues/204 for a proposal to add fragment arguments
  */
 interface Fragment<D : Fragment.Data> : Executable<D> {
-  @Throws(IOException::class)
-  override fun serializeVariables(writer: JsonWriter, customScalarAdapters: CustomScalarAdapters, withDefaultValues: Boolean)
-
-  override fun adapter(): Adapter<D>
-
-  override fun rootField(): CompiledField
-
   /**
    * Marker interface for generated models of this fragment
    */
diff --git a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Operation.kt b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Operation.kt
index e3323d2cfae..48f8fa44cdf 100644
--- a/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Operation.kt
+++ b/libraries/apollo-api/src/commonMain/kotlin/com/apollographql/apollo3/api/Operation.kt
@@ -1,7 +1,5 @@
 package com.apollographql.apollo3.api
 
-import com.apollographql.apollo3.api.json.JsonWriter
-import okio.IOException
 import kotlin.js.JsName
 
 /**
@@ -29,13 +27,6 @@ interface Operation<D : Operation.Data> : Executable<D> {
   @JsName("operationId")
   fun id(): String
 
-  override fun adapter(): Adapter<D>
-
-  @Throws(IOException::class)
-  override fun serializeVariables(writer: JsonWriter, customScalarAdapters: CustomScalarAdapters, withDefaultValues: Boolean)
-
-  override fun rootField(): CompiledField
-
   /**
    * Marker interface for generated models built from data returned by the server in response to this operation.
    */
diff --git a/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/KotlinCompiler.kt b/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/KotlinCompiler.kt
index d4deb182e1c..0e7c96493fd 100644
--- a/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/KotlinCompiler.kt
+++ b/libraries/apollo-compiler/src/test/kotlin/com/apollographql/apollo3/compiler/KotlinCompiler.kt
@@ -19,7 +19,7 @@ object KotlinCompiler {
     val result = KotlinCompilation().apply {
       sources = kotlinFiles
 
-      kotlincArguments = kotlincArguments + "-opt-in=kotlin.RequiresOptIn"
+      kotlincArguments = kotlincArguments + "-opt-in=kotlin.RequiresOptIn" + "-Xskip-prerelease-check"
       inheritClassPath = true
       verbose = false
       messageOutputStream = okio.blackholeSink().buffer().outputStream()
diff --git a/libraries/apollo-gradle-plugin/testProjects/kotlin-android-plugin-version/build.gradle.kts b/libraries/apollo-gradle-plugin/testProjects/kotlin-android-plugin-version/build.gradle.kts
index 3313c789fd6..8cc9c002a0f 100644
--- a/libraries/apollo-gradle-plugin/testProjects/kotlin-android-plugin-version/build.gradle.kts
+++ b/libraries/apollo-gradle-plugin/testProjects/kotlin-android-plugin-version/build.gradle.kts
@@ -1,4 +1,3 @@
-import com.android.build.gradle.BaseExtension
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
@@ -41,5 +40,6 @@ tasks.withType<KotlinCompile>().configureEach {
     // Required for Kotlin < 1.6.10
     // See https://kotlinlang.org/docs/whatsnew1620.html#compatibility-changes-in-the-xjvm-default-modes
     freeCompilerArgs += "-Xjvm-default=all"
+    freeCompilerArgs += "-Xskip-prerelease-check"
   }
 }
diff --git a/libraries/apollo-testing-support/api/apollo-testing-support.klib.api b/libraries/apollo-testing-support/api/apollo-testing-support.klib.api
index b785281cad3..5a104b1a83f 100644
--- a/libraries/apollo-testing-support/api/apollo-testing-support.klib.api
+++ b/libraries/apollo-testing-support/api/apollo-testing-support.klib.api
@@ -23,6 +23,3 @@ final fun com.apollographql.apollo3.testing/cwd(): kotlin/String // com.apollogr
 // Targets: [js]
 final val com.apollographql.apollo3.testing/HostFileSystem // com.apollographql.apollo3.testing/HostFileSystem|{}HostFileSystem[0]
     final fun <get-HostFileSystem>(): okio/FileSystem // com.apollographql.apollo3.testing/HostFileSystem.<get-HostFileSystem>|<get-HostFileSystem>(){}[0]
-// Targets: [wasmJs]
-final val com.apollographql.apollo3.testing.internal/empty // com.apollographql.apollo3.testing.internal/empty|{}empty[0]
-    final fun <get-empty>(): kotlin.js/JsAny // com.apollographql.apollo3.testing.internal/empty.<get-empty>|<get-empty>(){}[0]
diff --git a/libraries/apollo-testing-support/src/appleMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt b/libraries/apollo-testing-support/src/appleMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.apple.kt
similarity index 100%
rename from libraries/apollo-testing-support/src/appleMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt
rename to libraries/apollo-testing-support/src/appleMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.apple.kt
diff --git a/libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt b/libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.js.kt
similarity index 69%
rename from libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt
rename to libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.js.kt
index 4a0989b2997..ee4088d438a 100644
--- a/libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt
+++ b/libraries/apollo-testing-support/src/jsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.js.kt
@@ -6,12 +6,17 @@ import kotlinx.coroutines.DelicateCoroutinesApi
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.promise
 import kotlin.coroutines.CoroutineContext
-import kotlin.js.Promise
 
-// https://youtrack.jetbrains.com/issue/KT-21846/
-@Suppress("ACTUAL_WITHOUT_EXPECT", "ACTUAL_TYPE_ALIAS_TO_CLASS_WITH_DECLARATION_SITE_VARIANCE", "INCOMPATIBLE_MATCHING")
 @ApolloInternal
-actual typealias ApolloTestResult = Promise<Any>
+actual typealias ApolloTestResult = JsPromiseInterfaceForTesting
+
+// https://youtrack.jetbrains.com/issue/KT-60561
+@ApolloInternal
+@JsName("Promise")
+external class JsPromiseInterfaceForTesting {
+  fun then(onFulfilled: ((Unit) -> Unit), onRejected: ((Throwable) -> Unit)): JsPromiseInterfaceForTesting
+  fun then(onFulfilled: ((Unit) -> Unit)): JsPromiseInterfaceForTesting
+}
 
 @ApolloInternal
 @OptIn(DelicateCoroutinesApi::class)
@@ -40,5 +45,5 @@ actual fun runTest(
         after()
       }
     }
-  }
+  }.unsafeCast<ApolloTestResult>()
 }
diff --git a/libraries/apollo-testing-support/src/jvmMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt b/libraries/apollo-testing-support/src/jvmMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.jvm.kt
similarity index 100%
rename from libraries/apollo-testing-support/src/jvmMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.kt
rename to libraries/apollo-testing-support/src/jvmMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.jvm.kt
diff --git a/libraries/apollo-testing-support/src/wasmJsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.wasmJs.kt b/libraries/apollo-testing-support/src/wasmJsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.wasmJs.kt
index fef3e688e59..f6501b60de9 100644
--- a/libraries/apollo-testing-support/src/wasmJsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.wasmJs.kt
+++ b/libraries/apollo-testing-support/src/wasmJsMain/kotlin/com/apollographql/apollo3/testing/internal/runTest.wasmJs.kt
@@ -2,19 +2,24 @@ package com.apollographql.apollo3.testing.internal
 
 import com.apollographql.apollo3.annotations.ApolloInternal
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.promise
 import kotlin.coroutines.CoroutineContext
-import kotlin.js.Promise
 
-@Suppress("ACTUAL_WITHOUT_EXPECT", "ACTUAL_TYPE_ALIAS_TO_CLASS_WITH_DECLARATION_SITE_VARIANCE", "INCOMPATIBLE_MATCHING")
 @ApolloInternal
-actual typealias ApolloTestResult = Promise<JsAny>
+actual typealias ApolloTestResult = JsPromiseInterfaceForTesting
 
-/**
- * Utility method that executes the given [block] with optional [before] and [after] blocks.
- *
- * When [skipDelays] is `true`, the block is executed in [kotlinx.coroutines.test.runTest], otherwise in `runBlocking`.
- */
+// https://youtrack.jetbrains.com/issue/KT-60561
 @ApolloInternal
+@JsName("Promise")
+external class JsPromiseInterfaceForTesting: JsAny {
+  fun then(onFulfilled: ((JsAny) -> Unit), onRejected: ((JsAny) -> Unit)): JsPromiseInterfaceForTesting
+  fun then(onFulfilled: ((JsAny) -> Unit)): JsPromiseInterfaceForTesting
+}
+
+@ApolloInternal
+@OptIn(DelicateCoroutinesApi::class)
 actual fun runTest(
     skipDelays: Boolean,
     context: CoroutineContext,
@@ -22,7 +27,23 @@ actual fun runTest(
     after: suspend CoroutineScope.() -> Unit,
     block: suspend CoroutineScope.() -> Unit,
 ): ApolloTestResult {
-  return Promise.resolve(empty)
+  return if (skipDelays) {
+    kotlinx.coroutines.test.runTest(context) {
+      before()
+      try {
+        block()
+      } finally {
+        after()
+      }
+    }
+  } else {
+    GlobalScope.promise(context = context) {
+      before()
+      try {
+        block()
+      } finally {
+        after()
+      }
+    }
+  }.unsafeCast()
 }
-
-val empty: JsAny = js("({})")