diff --git a/.drone.yml b/.drone.yml
index 347c5a2..48606e3 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -3,12 +3,15 @@ kind: pipeline
 name: tests:latest
 
 steps:
+- name: clone
+  image: alpine/git
+  commands:
+  - git checkout $DRONE_SOURCE_BRANCH
 - name: run tests
   image: node:alpine
   commands:
   - yarn
   - yarn test
-  source: ${DRONE_SOURCE_BRANCH}
 trigger:
   event:
   - pull_request
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