diff --git a/specs/test-format.md b/specs/test-format.md
index b347792ca..d4256ef72 100644
--- a/specs/test-format.md
+++ b/specs/test-format.md
@@ -1,6 +1,6 @@
-# General test format
+# General test format [WIP]
 
-This document defines the general YAML format to which all tests should conform.
+This document defines the general YAML format to which all tests should conform. Testing specifications in Eth2.0 are still a work in progress. _Expect breaking changes_
 
 ## ToC
 
@@ -68,4 +68,4 @@ test_cases:
   output: [6, 65, 2, 5, 4, 2, 6, 6, 1, 1]
   seed: !!binary |
     JlAYJ5H2j8g7PLiPHZI/rTS1uAvKiieOrifPN6Moso0=
-```
\ No newline at end of file
+```