export NO_GPU_EXECUTION=1

.travis.yml

@@ -23,7 +23,7 @@ before_script:
   - git config --global user.email "you@example.com"
   - git config --global user.name "Your Name"
 script:
-  - export NO_GPU_EXECUTION
+  - export NO_GPU_EXECUTION=1
   - pip install -e .
   - python setup.py test
 after_success: