Install probrom test fail

I get some err when install tvm:

" thrown in the test body. [ FAILED ] BuildModule.Heterogeneous (111 ms) [----------] 2 tests from BuildModule (127 ms total)

[----------] Global test environment tear-down [==========] 2 tests from 1 test suite ran. (127 ms total) [ PASSED ] 1 test. [ FAILED ] 1 test, listed below: [ FAILED ] BuildModule.Heterogeneous

env: ununtu16.04LTS CUDA10.1 LLVM 6.0

hello , when i install tvm on ubuntu, and run test by: ./tests/scripts/task_cpp_unittest.s get the error .

when i run example relay_quick_start.py, then i get : Cannot find config for target=cuda -model=unknown, workload=(‘conv2d_nchw.cuda’ ,… File “/workspace/software/tvm/src/runtime/cuda/cuda_device_api.cc”, line 62 CUDA: Check failed: e == cudaSuccess || e == cudaErrorCudartUnloading: no CUDA-capable device is detected

Looking forward to your reply. Thank you very much.