diff --git a/testdata/run.sh b/testdata/run.sh
index b8824d1..4b66810 100755
--- a/testdata/run.sh
+++ b/testdata/run.sh
@@ -2,6 +2,7 @@
 
 set -ex
 
+: ${FORGEJO_RUNNER_LOGS:=forgejo-runner.log}
 DATA=$(dirname $0)
 DIR=$(mktemp -d)
 
@@ -29,10 +30,11 @@ function wait_success() {
 	if check_status "$forgejo" "$repo" "$sha"; then
 	    break
 	fi
+	tail $FORGEJO_RUNNER_LOGS
 	sleep 5
     done
     if ! test "$(check_status "$forgejo" "$repo" "$sha")" = "success" ; then
-	cat forgejo-runner.log
+	cat $FORGEJO_RUNNER_LOGS
 	return 1
     fi
 }