Improve wording in the ChangeLog
@@ -22,8 +22,8 @@ Changes
Inserted as an enhancement for #1371
* Add support for alternative CSR headers, as used by Microsoft and defined
in RFC 7468. Found by Michael Ernst. Fixes #767.
- * Reduced the complexity of the timing tests, as they were failing in less
- reliable environments.
+ * Reduced the complexity of the timing tests, as they were assuming more than
+ the underlying OS actually guarantees.
= mbed TLS 2.16.0 branch released 2018-12-21
