it's _test.sh not _test.bash
diff --git a/.travis.yml b/.travis.yml
index 6a5972b..c42cbf3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,4 +8,4 @@
 sudo: false
 
 script:
-  - ./_test.bash
\ No newline at end of file
+  - ./_test.sh
\ No newline at end of file