diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 7892758..dc98132 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -33,7 +33,7 @@ jobs:
           context: .
           file: docker/Dockerfile.test
           build-contexts: |
-            BASE_IMG=docker-image://${{ env.BASE_TAG }}
+            base_img=docker-image://${{ env.BASE_TAG }}
           load: true
           cache-from: type=gha
           cache-to: type=gha,mode=max
diff --git a/docker/Dockerfile.test b/docker/Dockerfile.test
index 3e28541..44e4846 100644
--- a/docker/Dockerfile.test
+++ b/docker/Dockerfile.test
@@ -1,5 +1,5 @@
-ARG BASE_IMG
-FROM BASE_IMG
+ARG base_img
+FROM base_img
 
 MAINTAINER Sarun Nuntaviriyakul <sarun.nuntaviriyakul@cern.ch>
 LABEL org.opencontainers.image.source https://github.com/guyzsarun/xrootd-cmsjson