diff --git a/Dockerfile.openj9 b/Dockerfile.openj9
index f30b14c..5ffffce 100644
--- a/Dockerfile.openj9
+++ b/Dockerfile.openj9
@@ -43,6 +43,12 @@ openj9.sharedclasses,openj9.zosconditionhandling
 
 RUN mv ./* /build/dist/
 
+ENV JT_JAVA=/build/bootjdk
+RUN cd /build/dist/jdk && ./bin/jtreg \
+    -jdk:/build/src/build/linux-x86_64-server-release/images/jdk -agentvm -verbose:summary \
+    -w build/jtreg/work -r build/jtreg/report \
+    test/java/lang/Class
+
 # ------
 
 FROM ubuntu:25.04 AS run