code: def test_count_nonzero(
      *,
      dtype_values_axis,
      keepdims,
      test_flags,
      on_device,
      fn_name,
      backend_fw,
  ):
      i_o_dtype, a, axis = dtype_values_axis
      helpers.test_function(
          input_dtypes=i_o_dtype[0],
          test_flags=test_flags,
          on_device=on_device,
          backend_to_test=backend_fw,
          fn_name=fn_name,
          a=a[0],
          axis=axis,
          keepdims=keepdims,
          dtype=i_o_dtype[1][0],
      )
  
imports: from hypothesis import strategies
  import ivy
  import ivy_tests.test_ivy.helpers
  from ivy_tests.test_ivy.helpers import handle_test
label_desc: Use image node_id 13 for calling a global function with example usage: test_count_nonzero() without return types