use HHVM 3.15 to run tests

xabbuh · xabbuh · commit a70b389c3838 · 2016-12-23T15:46:49.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -18,7 +18,7 @@ env:
 matrix:
     include:
         # Use the newer stack for HHVM as HHVM does not support Precise anymore since a long time and so Precise has an outdated version
-        - php: hhvm-stable
+        - php: hhvm-3.15
           sudo: required
           dist: trusty
           group: edge
