diff --git a/rc/filetype/rust.kak b/rc/filetype/rust.kak
index b7e0e8f0..8a57ce9e 100644
--- a/rc/filetype/rust.kak
+++ b/rc/filetype/rust.kak
@@ -39,10 +39,9 @@ add-highlighter shared/rust/line_doctest region ^\h*//[!/]\h*```($|should_panic|
 add-highlighter shared/rust/line_doctest/marker region ```.* $ group
 add-highlighter shared/rust/line_doctest/marker/fence regex ``` 0:meta
 add-highlighter shared/rust/line_doctest/marker/keywords regex [\d\w] 0:meta # already matched above, just ignore comma
-add-highlighter shared/rust/line_doctest/inner region '^\h*//[!/]\h+#' ' ' group
+add-highlighter shared/rust/line_doctest/inner region '^\h*//[!/]( #(?= )|)' ' ' group
 add-highlighter shared/rust/line_doctest/inner/comment regex //[!/] 0:documentation
 add-highlighter shared/rust/line_doctest/inner/hidden regex '#' 0:meta
-add-highlighter shared/rust/line_doctest/comment region ^\h*//[!/] ' '                      fill documentation
 add-highlighter shared/rust/line_doctest/code default-region ref rust
 add-highlighter shared/rust/line_code_rest   region ^\h*//[!/]\h*``` ^\h*//[!/]\h*```$      fill documentation # reset invalid doctest
 add-highlighter shared/rust/line_comment2    region //[!/]{2} $                             fill comment
diff --git a/test/highlight/rust/comment/in b/test/highlight/rust/comment/in
index 2ce32f0a..c4dd2113 100644
--- a/test/highlight/rust/comment/in
+++ b/test/highlight/rust/comment/in
@@ -86,3 +86,19 @@ fn bar(s: &str) {
      * ```
      */
 
+    //! ```
+    //! // not hidden #
+    //! #![feature(x)]
+    //! # // hidden #
+    //! # #![feature(x)]
+    //! ```
+
+    /**
+     * ```
+     * // not hidden #
+     * #![feature(x)]
+     * # // hidden #
+     * # #![feature(x)]
+     * ```
+     */
+