diff --git a/test/data/json_roundtrip/roundtrip27.json b/test/data/json_roundtrip/roundtrip27.json
index 17ce5211c..672438c56 100644
--- a/test/data/json_roundtrip/roundtrip27.json
+++ b/test/data/json_roundtrip/roundtrip27.json
@@ -1 +1 @@
-[1.7976931348623157e308]
\ No newline at end of file
+[1.7976931348623157e+308]
\ No newline at end of file