diff --git a/build.gradle b/build.gradle
index a2951cc709e..9a21fdccd3d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -69,4 +69,8 @@ shadowJar {
     archiveFileName = 'addressbook.jar'
 }
 
+run {
+    enableAssertions = true
+}
+
 defaultTasks 'clean', 'test'