diff --git a/build/gulpfile.hygiene.js b/build/gulpfile.hygiene.js
index 246b728b215c48f45138b6beb1817aa83b99c40b..5008269333453003fd762409983673fd60f661ed 100644
--- a/build/gulpfile.hygiene.js
+++ b/build/gulpfile.hygiene.js
@@ -87,6 +87,7 @@ const indentationFilter = [
 	'!build/azure-pipelines/**/*.js',
 	'!build/azure-pipelines/**/*.config',
 	'!**/Dockerfile',
+	'!**/Dockerfile.*',
 	'!**/*.Dockerfile',
 	'!**/*.dockerfile',
 	'!extensions/markdown-language-features/media/*.js'