--- a/tools/clang-tidy/config.yaml
+++ b/tools/clang-tidy/config.yaml
@@ -32,17 +32,18 @@ clang_checkers:
    publish: !!bool yes
  - name: modernize-use-equals-default
    publish: !!bool yes
  - name: modernize-use-equals-delete
    publish: !!bool yes
  - name: modernize-use-nullptr
    publish: !!bool yes
  - name: modernize-use-override
-   publish: !!bool yes
+   # Too noisy because of the way how we implement NS_IMETHOD. See Bug 1420366.
+   publish: !!bool no
  - name: mozilla-*
    publish: !!bool yes
  - name: performance-*
    publish: !!bool yes
  - name: readability-container-size-empty
    publish: !!bool yes
  - name: readability-else-after-return
    publish: !!bool yes