diff --git a/.travis.yml b/.travis.yml
index c847910..07698f0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,8 +8,9 @@ python:
   - pypy
 
 env:
-  - BUILD_CAPNP=true
   - BUILD_CAPNP=
+  - BUILD_CAPNP=true
+  - BUILD_CAPNP=true CXXFLAGS="-g"
 
 # skip testing for pypy + BUILD_CAPNP=false since it's failing in travis for some reason
 matrix: