diff --git a/.github/workflows/manually_build_for_testing.yml b/.github/workflows/manually_build_for_testing.yml
index 4add0185..774be308 100644
--- a/.github/workflows/manually_build_for_testing.yml
+++ b/.github/workflows/manually_build_for_testing.yml
@@ -125,6 +125,7 @@ jobs:
         export base_image=intelanalytics/bigdl-ppml-trusted-dl-serving-gramine-base
         export image=intelanalytics/bigdl-ppml-trusted-dl-serving-gramine-ref
         cd ppml/trusted-deep-learning/ref
+        openssl genrsa -3 -out enclave-key.pem 3072
         sudo docker build \
           --no-cache=true \
           --build-arg http_proxy=${HTTP_PROXY} \
@@ -854,4 +855,4 @@ jobs:
         sudo docker rmi -f ${bigdata_custom_image}:${TAG} 10.239.45.10/arda/${bigdata_custom_image}:${TAG}
 
         sudo docker rmi -f ${base_image}:${TAG}
-        sudo docker rmi -f ${bigdata_base_image}:${TAG} 10.239.45.10/arda/${bigdata_base_image}:${TAG}
\ No newline at end of file
+        sudo docker rmi -f ${bigdata_base_image}:${TAG} 10.239.45.10/arda/${bigdata_base_image}:${TAG}