diff --git a/src/test/java/net/lamgc/oracle/sentry/script/groovy/trigger/BaseTestTrigger.java b/src/test/java/net/lamgc/oracle/sentry/script/groovy/trigger/BaseTestTrigger.java
index ea12520..ba2acee 100644
--- a/src/test/java/net/lamgc/oracle/sentry/script/groovy/trigger/BaseTestTrigger.java
+++ b/src/test/java/net/lamgc/oracle/sentry/script/groovy/trigger/BaseTestTrigger.java
@@ -7,4 +7,9 @@ public abstract class BaseTestTrigger implements GroovyTrigger {
     public void run(Closure<?> task) {
         throw new UnsupportedOperationException("Unavailable trigger.");
     }
+
+    @Override
+    public void shutdown() {
+        // Do nothing.
+    }
 }