diff --git a/.travis.yml b/.travis.yml
index a2ced6a..4064e96 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,2 +1,3 @@
 language: c
-script: cc ph7.c -Ofast
\ No newline at end of file
+script:
+- CC ph7.c examples/ph7_intro.c -W -Wall -Ofast