diff --git a/.ameba.yml b/.ameba.yml
index 370334f9..96514f6d 100644
--- a/.ameba.yml
+++ b/.ameba.yml
@@ -16,6 +16,7 @@ Documentation/DocumentationAdmonition:
     - src/spectator/matchers/built_in.cr
     - src/spectator/matchers/expect.cr
     - src/spectator/matchers/matcher.cr
+    - src/spectator/matchers/negated.cr
   Admonitions:
     - TODO
     - FIXME