diff --git a/test/unit/test_uop_symbolic.py b/test/unit/test_uop_symbolic.py
index d5fb8a5655..e4552679d6 100644
--- a/test/unit/test_uop_symbolic.py
+++ b/test/unit/test_uop_symbolic.py
@@ -617,6 +617,7 @@ class TestSymInfer(unittest.TestCase):
     c = Variable("c", 0, 10)
     var_vals = {a: 2, b: 3, c: 4}
     assert sym_infer(5, var_vals) == 5
+    assert sym_infer(4.2, var_vals) == 4.2
     assert sym_infer(a, var_vals) == 2
     assert sym_infer(b, var_vals) == 3
     assert sym_infer(a+b, var_vals) == 5