diff --git a/tests/float/builtin_float_hash.py b/tests/float/builtin_float_hash.py
index ba6b639073..dd184595f9 100644
--- a/tests/float/builtin_float_hash.py
+++ b/tests/float/builtin_float_hash.py
@@ -15,6 +15,7 @@ for val in (
     '0.1',
     '-0.1',
     '10.3',
+    '1e16',
     'inf',
     '-inf',
     'nan',