code: def donottest_cublas_mixing(self):
      self.test_streamed_kernel()
  
      import pycuda.blas as blas
  
      shape = (10,)
      a = blas.ones(shape, dtype=np.float32)
      b = 33 * blas.ones(shape, dtype=np.float32)
      assert ((-a + b).from_gpu() == 32).all()
  
      self.test_streamed_kernel()
  
imports: import numpy
  import numpy.linalg
  from pycuda.tools import mark_cuda_test, dtype_to_ctype
  import pytest
  import pycuda.gpuarray
  import pycuda.driver
  from pycuda.compiler import SourceModule
label_desc: Use image node_id 8 for calling the TestDriver obj's underlying member method code with example usage: obj.donottest_cublas_mixing() without return types