3 files changed, 6 insertions, 0 deletions
diff --git a/library/std/src/collections/hash/map.rs b/library/std/src/collections/hash/map.rs
index d7cb8a55636..fac285c96f0 100644
--- a/library/std/src/collections/hash/map.rs
+++ b/library/std/src/collections/hash/map.rs
@@ -1829,6 +1829,7 @@ impl<K, V, S> Debug for RawEntryBuilder<'_, K, V, S> {
 ///
 /// [`entry`]: HashMap::entry
 #[stable(feature = "rust1", since = "1.0.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "HashMapEntry")]
 pub enum Entry<'a, K: 'a, V: 'a> {
     /// An occupied entry.
     #[stable(feature = "rust1", since = "1.0.0")]
diff --git a/library/std/src/fs.rs b/library/std/src/fs.rs
index fb928ea5598..bbe1ab40537 100644
--- a/library/std/src/fs.rs
+++ b/library/std/src/fs.rs
@@ -88,6 +88,7 @@ use crate::time::SystemTime;
 /// [`BufReader<R>`]: io::BufReader
 /// [`sync_all`]: File::sync_all
 #[stable(feature = "rust1", since = "1.0.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "File")]
 pub struct File {
     inner: fs_imp::File,
 }
@@ -183,12 +184,14 @@ pub struct Permissions(fs_imp::FilePermissions);
 /// It is returned by [`Metadata::file_type`] method.
 #[stable(feature = "file_type", since = "1.1.0")]
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+#[cfg_attr(not(test), rustc_diagnostic_item = "FileType")]
 pub struct FileType(fs_imp::FileType);
 
 /// A builder used to create directories in various manners.
 ///
 /// This builder also supports platform-specific options.
 #[stable(feature = "dir_builder", since = "1.6.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "DirBuilder")]
 #[derive(Debug)]
 pub struct DirBuilder {
     inner: fs_imp::DirBuilder,
diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
index ad8975c03f1..cc615b95f86 100644
--- a/library/std/src/io/mod.rs
+++ b/library/std/src/io/mod.rs
@@ -514,6 +514,7 @@ pub(crate) fn default_read_exact<R: Read + ?Sized>(this: &mut R, mut buf: &mut [
 /// [`File`]: crate::fs::File
 #[stable(feature = "rust1", since = "1.0.0")]
 #[doc(notable_trait)]
+#[cfg_attr(not(test), rustc_diagnostic_item = "IoRead")]
 pub trait Read {
     /// Pull some bytes from this source into the specified buffer, returning
     /// how many bytes were read.
@@ -1361,6 +1362,7 @@ impl Initializer {
 /// [`write_all`]: Write::write_all
 #[stable(feature = "rust1", since = "1.0.0")]
 #[doc(notable_trait)]
+#[cfg_attr(not(test), rustc_diagnostic_item = "IoWrite")]
 pub trait Write {
     /// Write a buffer into this writer, returning how many bytes were written.
     ///