diff --git a/tests/nuclear_test.py b/tests/nuclear_test.py
index 45093fc..fd9610f 100644
--- a/tests/nuclear_test.py
+++ b/tests/nuclear_test.py
@@ -113,6 +113,7 @@ def test_varsh_872_5(nuclear: NuclearBogoliubovDrudge):
 
     TODO: Investigate its failure in Apache Spark environment.
     """
+
     dr = nuclear
     a, alpha, b, beta, b_prm, beta_prm = symbols(
         'a alpha b beta bprm betaprm', integer=True
@@ -132,7 +133,7 @@ def test_varsh_872_5(nuclear: NuclearBogoliubovDrudge):
     )
     for sums_i in [sums, reversed(sums)]:
         tensor = dr.sum(*sums_i, amp)
-        res = tensor.deep_simplify().merge()
+        res = tensor.simplify_am().merge() #previously used deep_simplify
         assert res.n_terms == 1
         term = res.local_terms[0]
         assert len(term.sums) == 0