diff --git a/core/deployment/src/main/java/io/quarkus/deployment/dev/testing/TestConfig.java b/core/deployment/src/main/java/io/quarkus/deployment/dev/testing/TestConfig.java
index 5c82f54fe447d..d6817f6794114 100644
--- a/core/deployment/src/main/java/io/quarkus/deployment/dev/testing/TestConfig.java
+++ b/core/deployment/src/main/java/io/quarkus/deployment/dev/testing/TestConfig.java
@@ -226,6 +226,7 @@ public class TestConfig {
      * most parent first classes it will just cause problems.
      */
     @ConfigItem(defaultValue = "java\\..*")
+    @Deprecated(forRemoval = true)
     String classClonePattern;
 
     /**