diff --git a/.travis.yml b/.travis.yml
index 756c6d7..524c232 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,6 +9,7 @@ php:
   - 7.2
   - 7.3
   - 7.4
+  - nightly
 
 matrix:
   allow_failures: