fix test

Author: aloctavodia

tests/test_bart.py

@@ -5,6 +5,7 @@
 from numpy.testing import assert_almost_equal, assert_array_equal
 from pymc.tests.distributions.util import assert_moment_is_expected
 
+import pymc_bart as pmb
 
 def test_split_node():
     split_node = pmb.tree.SplitNode(index=5, idx_split_variable=2, split_value=3.0)