diff --git a/HACKING.rst b/HACKING.rst
index 2a7ae1d..5b9c0f1 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -25,6 +25,8 @@
 - [T115] Check that admin tests should exist under admin path
 - [N322] Method's default argument shouldn't be mutable
 - [T116] Unsupported 'message' Exception attribute in PY3
+- [T117] Check negative tests have ``@decorators.attr(type=['negative'])``
+  applied.
 
 Test Data/Configuration
 -----------------------
@@ -146,11 +148,6 @@
 This attribute must be applied to each test that belongs to a negative test
 class, i.e. a test class name ending with "Negative.*" substring.
 
-.. todo::
-
-  Add a hacking check for ensuring that all classes that contain substring
-  "Negative" have the negative attribute decorator applied above each test.
-
 Slow Attribute
 ^^^^^^^^^^^^^^
 The ``type='slow'`` attribute is used to signify that a test takes a long time