don't test the python code for gpu test in DebugMode.

theano/sandbox/cuda/tests/test_blas.py

+import copy
 from unittest import TestCase
 
 from theano.compile.pfunc import pfunc
@@ -32,6 +33,12 @@ else:
     mode_with_gpu = theano.compile.mode.get_default_mode().including('gpu')
     mode_without_gpu = theano.compile.mode.get_default_mode().excluding('gpu')
 
+#The CPU tests already compare C/Py, so we only check C/GPU
+mode_with_gpu = copy.copy(mode_with_gpu)
+mode_without_gpu = copy.copy(mode_without_gpu)
+mode_with_gpu.check_py_code = False
+mode_without_gpu.check_py_code = False
+
 
 def my_rand(*shape):
     return theano._asarray(numpy.random.rand(*shape), dtype='float32')