diff --git a/.drone.star b/.drone.star
index 8eb9e76a8..24da7a04d 100644
--- a/.drone.star
+++ b/.drone.star
@@ -134,6 +134,11 @@ def testing(ctx):
           'SONAR_TOKEN': {
             'from_secret': 'sonar_token',
           },
+          'SONAR_PULL_REQUEST_PROVIDER': 'GitHub' if ctx.build.event == 'pull_request' else None,
+          'SONAR_PULL_REQUEST_REPO': 'owncloud/ocis-thumbnails' if ctx.build.event == 'pull_request' else None,
+          'SONAR_PULL_REQUEST_BASE': 'master' if ctx.build.event == 'pull_request' else None,
+          'SONAR_PULL_REQUEST_BRANCH': ctx.build.source if ctx.build.event == 'pull_request' else None,
+          'SONAR_PULL_REQUEST_KEY': ctx.build.ref if ctx.build.event == 'pull_request' else None,
         },
       },
     ],
diff --git a/sonar-project.properties b/sonar-project.properties
index aede03677..05a5d21ff 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -23,11 +23,11 @@ sonar.links.issue=https://github.com/owncloud/ocis-thumbnails/issues
 sonar.sources=.
 
 # Pull Requests
-sonar.pullrequest.provider=GitHub
-sonar.pullrequest.github.repository=owncloud/ocis-thumbnails
-sonar.pullrequest.base=${env.DRONE_BRANCH}
-sonar.pullrequest.branch=${env.DRONE_SOURCE_BRANCH}
-sonar.pullrequest.key=${env.DRONE_PULL_REQUEST}
+sonar.pullrequest.provider=${SONAR_PULL_REQUEST_PROVIDER}
+sonar.pullrequest.github.repository=${SONAR_PULL_REQUEST_REPO}
+sonar.pullrequest.base=${SONAR_PULL_REQUEST_BASE}
+sonar.pullrequest.branch=${SONAR_PULL_REQUEST_BRANCH}
+sonar.pullrequest.key=${SONAR_PULL_REQUEST_KEY}
 
 
 # Properties specific to language plugins: