diff --git a/nms-patches/net/minecraft/world/level/block/entity/trialspawner/TrialSpawner.patch b/nms-patches/net/minecraft/world/level/block/entity/trialspawner/TrialSpawner.patch
index 81598fd22..08c6f7249 100644
--- a/nms-patches/net/minecraft/world/level/block/entity/trialspawner/TrialSpawner.patch
+++ b/nms-patches/net/minecraft/world/level/block/entity/trialspawner/TrialSpawner.patch
@@ -22,7 +22,7 @@
  
      public Codec<TrialSpawner> codec() {
          return RecordCodecBuilder.create((instance) -> {
-@@ -219,13 +219,13 @@
+@@ -219,13 +219,18 @@
                                  }
  
                                  entityinsentient.setPersistenceRequired();
@@ -34,7 +34,12 @@
                              }
  
 -                            if (!worldserver.tryAddFreshEntityWithPassengers(entity)) {
-+                            if (!worldserver.tryAddFreshEntityWithPassengers(entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.TRIAL_SPAWNER)) { // CraftBukkit
++                            // CraftBukkit start
++                            if (org.bukkit.craftbukkit.event.CraftEventFactory.callTrialSpawnerSpawnEvent(entity, blockposition).isCancelled()) {
++                                return Optional.empty();
++                            }
++                            if (!worldserver.tryAddFreshEntityWithPassengers(entity, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.TRIAL_SPAWNER)) {
++                                // CraftBukkit end
                                  return Optional.empty();
                              } else {
                                  TrialSpawner.a trialspawner_a = this.isOminous ? TrialSpawner.a.OMINOUS : TrialSpawner.a.NORMAL;
diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
index be93479b8..c6bc8a452 100644
--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
@@ -211,6 +211,7 @@ import org.bukkit.event.entity.ProjectileHitEvent;
 import org.bukkit.event.entity.ProjectileLaunchEvent;
 import org.bukkit.event.entity.SpawnerSpawnEvent;
 import org.bukkit.event.entity.StriderTemperatureChangeEvent;
+import org.bukkit.event.entity.TrialSpawnerSpawnEvent;
 import org.bukkit.event.entity.VillagerCareerChangeEvent;
 import org.bukkit.event.inventory.InventoryCloseEvent;
 import org.bukkit.event.inventory.InventoryOpenEvent;
@@ -1568,6 +1569,21 @@ public class CraftEventFactory {
         return event;
     }
 
+    /**
+     * Trial Mob spawner event.
+     */
+    public static TrialSpawnerSpawnEvent callTrialSpawnerSpawnEvent(Entity spawnee, BlockPosition pos) {
+        org.bukkit.craftbukkit.entity.CraftEntity entity = spawnee.getBukkitEntity();
+        BlockState state = CraftBlock.at(spawnee.level(), pos).getState();
+        if (!(state instanceof org.bukkit.block.TrialSpawner)) {
+            state = null;
+        }
+
+        TrialSpawnerSpawnEvent event = new TrialSpawnerSpawnEvent(entity, (org.bukkit.block.TrialSpawner) state);
+        entity.getServer().getPluginManager().callEvent(event);
+        return event;
+    }
+
     public static EntityToggleGlideEvent callToggleGlideEvent(EntityLiving entity, boolean gliding) {
         EntityToggleGlideEvent event = new EntityToggleGlideEvent((LivingEntity) entity.getBukkitEntity(), gliding);
         entity.level().getCraftServer().getPluginManager().callEvent(event);