diff --git a/.drone.yml b/.drone.yml
index b7b5f5d..f1f6469 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,6 +3,14 @@ kind: pipeline
 name: default
 
 steps:
+  - name: build image only
+    image: plugins/docker
+    settings:
+      dry_run: true
+    when:
+      event:
+        - pull_request
+
   - name: build and publish image
     image: plugins/docker
     settings: