diff --git a/.travis.yml b/.travis.yml
index cd849f05f..679d42a5d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,6 +50,8 @@ matrix:
       env: SWIGLANG=python SWIG_FEATURES=-builtin
     - compiler: gcc
       env: SWIGLANG=python SWIG_FEATURES=-builtin PY3=3
+    - compiler: gcc
+      env: SWIGLANG=python SWIG_FEATURES=-O
     - compiler: gcc
       env: SWIGLANG=python SWIG_FEATURES=-classic
     - compiler: gcc
@@ -65,6 +67,9 @@ matrix:
     # Not quite working yet
     - compiler: gcc
       env: SWIGLANG=python SWIG_FEATURES=-classic
+    # Not quite working yet
+    - compiler: gcc
+      env: SWIGLANG=python SWIG_FEATURES=-O
     # Lots of failing tests currently
     - compiler: gcc
       env: SWIGLANG=ocaml