diff --git a/rustfmt.toml b/rustfmt.toml
index 135dd29ad7c..31d1e9b50e5 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -20,7 +20,7 @@ ignore = [
     "/tests/rustdoc/",                # Some have syntax errors, some are whitespace-sensitive.
     "/tests/rustdoc-gui/",            # Some tests are sensitive to source code layout.
     "/tests/rustdoc-ui/",             # Some have syntax errors, some are whitespace-sensitive.
-    "/tests/ui/",
+    "/tests/ui/",                     # Some have syntax errors, some are whitespace-sensitive.
     "/tests/ui-fulldeps/",
 
     # Do not format submodules.