diff --git a/test/test_codegen.py b/test/test_codegen.py
index f555239c9b78123024275df3cda0929514b0d877..815b92dd9dccf8111cd5f7f1204f99e9485911de 100644
--- a/test/test_codegen.py
+++ b/test/test_codegen.py
@@ -27,39 +27,6 @@ import logging
 logger = logging.getLogger(__name__)
 
 
-def test_kill_trivial_assignments():
-    from pymbolic import var
-    x, y, t0, t1, t2 = [var(s) for s in "x y t0 t1 t2".split()]
-
-    assignments = (
-        ("t0", 6),
-        ("t1", x),
-        ("t2", 6*x),
-        ("nt", x**y),
-        # users of trivial assignments
-        ("u0", t0 + 1),
-        ("u1", t1 + 1),
-        ("u2", t2 + 1),
-    )
-
-    from sumpy.codegen import kill_trivial_assignments
-    result = kill_trivial_assignments(
-        assignments,
-        retain_names=("u0", "u1", "u2"))
-
-    from pymbolic.primitives import Sum
-
-    def _s(*vals):
-        return Sum(vals)
-
-    assert result == [
-        ("t2", 6*x),
-        ("nt", x**y),
-        ("u0", _s(6, 1)),
-        ("u1", _s(x, 1)),
-        ("u2", _s(t2, 1))]
-
-
 def test_symbolic_assignment_name_uniqueness():
     # https://gitlab.tiker.net/inducer/sumpy/issues/13
     from sumpy.assignment_collection import SymbolicAssignmentCollection