diff --git a/src/test/java/world/bentobox/acidisland/events/AcidEventTest.java b/src/test/java/world/bentobox/acidisland/events/AcidEventTest.java
index c3d2c6b..0742a1b 100644
--- a/src/test/java/world/bentobox/acidisland/events/AcidEventTest.java
+++ b/src/test/java/world/bentobox/acidisland/events/AcidEventTest.java
@@ -15,8 +15,11 @@ import org.bukkit.potion.PotionEffectType;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
+import org.powermock.modules.junit4.PowerMockRunner;
 
+@RunWith(PowerMockRunner.class)
 public class AcidEventTest {
 
     @Mock
diff --git a/src/test/java/world/bentobox/acidisland/events/AcidRainEventTest.java b/src/test/java/world/bentobox/acidisland/events/AcidRainEventTest.java
index d4c28db..94af9fd 100644
--- a/src/test/java/world/bentobox/acidisland/events/AcidRainEventTest.java
+++ b/src/test/java/world/bentobox/acidisland/events/AcidRainEventTest.java
@@ -6,17 +6,20 @@ import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
 import org.bukkit.entity.Player;
 import org.bukkit.potion.PotionEffectType;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
+import org.powermock.modules.junit4.PowerMockRunner;
 
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
+@RunWith(PowerMockRunner.class)
 public class AcidRainEventTest {
 
     @Mock