diff --git a/.travis.yml b/.travis.yml
index 786ba9d..7c1d099 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,9 @@ python:
   - "3.7"
   - "3.8"
 
+env:
+  - PYTHONOPTIMIZE=1
+
 addons:
   apt:
     packages: