diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 2166bb3..6060b5a 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -5,7 +5,7 @@ android-compileSdk = "36"
 android-minSdk = "26"
 androidx-activityCompose = "1.12.2"
 assertj = "3.27.2"
-kotlinCompileTesting = "0.11.0"
+kotlinCompileTesting = "0.12.1"
 junitVersion = "4.13.2"
 storytale = "0.0.3+dev8"
 
diff --git a/modules/compiler-plugin/src/kotlin/StorytaleLoweringExtension.kt b/modules/compiler-plugin/src/kotlin/StorytaleLoweringExtension.kt
index 9d7613e..d09da60 100644
--- a/modules/compiler-plugin/src/kotlin/StorytaleLoweringExtension.kt
+++ b/modules/compiler-plugin/src/kotlin/StorytaleLoweringExtension.kt
@@ -10,7 +10,6 @@ import org.jetbrains.kotlin.ir.IrElement
 import org.jetbrains.kotlin.ir.IrStatement
 import org.jetbrains.kotlin.ir.UNDEFINED_OFFSET
 import org.jetbrains.kotlin.ir.declarations.IrDeclaration
-import org.jetbrains.kotlin.ir.declarations.IrDeclarationOrigin
 import org.jetbrains.kotlin.ir.declarations.IrFile
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.declarations.IrProperty
@@ -74,7 +73,7 @@ private class AddCodeSnippetToStoriesLowering(context: IrPluginContext) : BodyLo
         }
 
         private fun IrDeclaration.getFileSourceCode(): CharSequence? {
-            return (file.metadata as FirMetadataSource).fir.source.text
+            return (file.metadata as? FirMetadataSource)?.fir?.source?.text
         }
     }
 }
@@ -134,11 +133,10 @@ private class MentionAllStoriesGettersInsideMainFunctionLowering(
         )
     }
 
+    // In K2, delegate backing field origin may not be PROPERTY_DELEGATE; match factory type directly
     private fun IrProperty.isStory(factoryType: IrType) = isTopLevel &&
         isDelegated &&
-        backingField?.let {
-            it.origin == IrDeclarationOrigin.PROPERTY_DELEGATE && it.type == factoryType
-        } ?: false
+        backingField?.type == factoryType
 
     private fun IrSimpleFunction.isGeneratedMainViewController() = isTopLevel &&
         visibility.isPublicAPI &&