diff --git a/engine/engine-paper/build.gradle.kts b/engine/engine-paper/build.gradle.kts
index a140ca0093..eb314e19d4 100644
--- a/engine/engine-paper/build.gradle.kts
+++ b/engine/engine-paper/build.gradle.kts
@@ -60,6 +60,8 @@ dependencies {
     compileOnlyApi("com.github.retrooper:packetevents-spigot:2.7.0-SNAPSHOT")
     compileOnly("me.clip:placeholderapi:2.11.6")
     compileOnlyApi("org.geysermc.floodgate:api:2.2.3-SNAPSHOT")
+
+    testImplementation("org.mockbukkit.mockbukkit:mockbukkit-v1.21:4.18.0")
 }
 
 tasks.withType<ShadowJar> {
diff --git a/engine/engine-paper/src/test/kotlin/com/typewritermc/utils/PlaceholderParserTest.kt b/engine/engine-paper/src/test/kotlin/com/typewritermc/utils/PlaceholderParserTest.kt
index f93d32002f..43e632677e 100644
--- a/engine/engine-paper/src/test/kotlin/com/typewritermc/utils/PlaceholderParserTest.kt
+++ b/engine/engine-paper/src/test/kotlin/com/typewritermc/utils/PlaceholderParserTest.kt
@@ -158,7 +158,7 @@ class PlaceholderParserTest : FunSpec({
                 }
             }
 
-            checkAll<String, String>() { string, action ->
+            checkAll<String, String> { string, action ->
                 parser.parse(null, listOf(string, action)) shouldBe "Hey $string, $action"
             }
             parser.parse(null, listOf("bob")) shouldBe null
diff --git a/extensions/_DocsExtension/src/main/kotlin/com/typewritermc/example/entries/interaction/ExampleInteractionBound.kt b/extensions/_DocsExtension/src/main/kotlin/com/typewritermc/example/entries/interaction/ExampleInteractionBound.kt
index 2ad8cb2f7a..5589f0b217 100644
--- a/extensions/_DocsExtension/src/main/kotlin/com/typewritermc/example/entries/interaction/ExampleInteractionBound.kt
+++ b/extensions/_DocsExtension/src/main/kotlin/com/typewritermc/example/entries/interaction/ExampleInteractionBound.kt
@@ -51,7 +51,7 @@ class ExampleBound(
 
             // A manual version of the above
             when (event.player.boundState) {
-                InteractionBoundState.BLOCKING -> event.cancelled = true
+                InteractionBoundState.BLOCKING -> event.isCancelled = true
                 InteractionBoundState.INTERRUPTING -> InteractionEndTrigger.triggerFor(event.player, context())
                 InteractionBoundState.IGNORING -> {}
             }
@@ -70,7 +70,7 @@ class ExampleBound(
 }
 //</code-block:interaction_bound>
 
-class SomeCancellablePlayerEvent(player: Player, var cancelled: Boolean) : PlayerEvent(player, true), Cancellable {
+class SomeCancellablePlayerEvent(player: Player) : PlayerEvent(player, true), Cancellable {
     override fun getHandlers(): HandlerList = HANDLER_LIST
 
     companion object {
@@ -78,9 +78,6 @@ class SomeCancellablePlayerEvent(player: Player, var cancelled: Boolean) : Playe
         val HANDLER_LIST = HandlerList()
     }
 
-    override fun isCancelled(): Boolean = cancelled
-
-    override fun setCancelled(isCancelled: Boolean) {
-        cancelled = isCancelled
-    }
+    override fun isCancelled(): Boolean = false
+    override fun setCancelled(p0: Boolean) {}
 }
\ No newline at end of file