diff --git a/core/src/main/java/org/testcontainers/containers/GenericContainer.java b/core/src/main/java/org/testcontainers/containers/GenericContainer.java
index 22a6c2408d6..55b359bc0e5 100644
--- a/core/src/main/java/org/testcontainers/containers/GenericContainer.java
+++ b/core/src/main/java/org/testcontainers/containers/GenericContainer.java
@@ -2,7 +2,6 @@
 
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.MapperFeature;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 import com.github.dockerjava.api.DockerClient;
 import com.github.dockerjava.api.command.CreateContainerCmd;
@@ -107,6 +106,8 @@ public class GenericContainer<SELF extends GenericContainer<SELF>>
         extends FailureDetectingExternalResource
         implements Container<SELF>, AutoCloseable, WaitStrategyTarget, Startable {
 
+    public static final Object ANOTHER_DUMMY_CHANGE_TO_INVALIDATE_BUILD_CACHE = new Object();
+
     private static final Charset UTF8 = Charset.forName("UTF-8");
 
     public static final int CONTAINER_RUNNING_TIMEOUT_SEC = 30;