diff --git a/.travis.yml b/.travis.yml
index 0112145..325909d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 sudo: required
-dist: trusty
+dist: bionic
 
 os: linux
 
@@ -57,4 +57,4 @@ script:
   - sh util/build.sh $NGINX_VERSION > build.log 2>&1 || (cat build.log && exit 1)
   - nginx -V
   - ldd `which nginx`|grep luajit
-  - prove -r t
+  - prove -I. -r t