Skip GPU execution test on Travis

.travis.yml

@@ -23,6 +23,7 @@ before_script:
   - git config --global user.email "you@example.com"
   - git config --global user.name "Your Name"
 script:
+  - export NO_GPU_EXECUTION
   - pip install -e .
   - python setup.py test
 after_success:

tests/backends/test_torch_native_compilation.py

@@ -10,6 +10,7 @@ from os.path import dirname, isfile, join
 import appdirs
 import jinja2
 import numpy as np
+import pytest
 import torch
 
 import pystencils
@@ -163,6 +164,7 @@ def test_execute_torch():
     assert op_cpp is not None
 
 
+@pytest.skip('NO_GPU_EXECUTION' in os.environ, reason='Skip GPU execution tests')
 def test_execute_torch_gpu():
     x, y = pystencils.fields('x, y: float64[32,32]')