maybe like this?

korny · korny · commit e18aa32071f4 · 2019-11-24T16:52:50.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -14,7 +14,7 @@ rvm:
   - 2.4
   - 2.5
   - 2.6
-  - 2.7.0-preview3
+  - 2.7
   - ruby-head
   - jruby
 matrix:
