Show errors in Travis CI build
diff --git a/.travis.yml b/.travis.yml
index 68d37b5..e35dd5d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,4 +13,4 @@
       - bazel
 script:
   - bazel build //...
-  - bazel test //...
+  - bazel test --test_output=errors //...