diff --git a/core/math/parser/parser-tests.factor b/core/math/parser/parser-tests.factor
index cee2314d07..aad87ca995 100755
--- a/core/math/parser/parser-tests.factor
+++ b/core/math/parser/parser-tests.factor
@@ -41,8 +41,8 @@ unit-test
 [ "-1.0e-2" string>number number>string ]
 unit-test
 
-[ "-1.0e-12" ]
-[ "-1.0e-12" string>number number>string ]
+[ t ]
+[ "-1.0e-12" string>number number>string { "-1.0e-12" "-1.0e-012" } member? ]
 unit-test
 
 [ f ]