diff --git a/src/test/rustdoc/intra-doc-crate/additional_doc.rs b/src/test/rustdoc/intra-doc-crate/additional_doc.rs
index d72548b0e2de..95df8a781d29 100644
--- a/src/test/rustdoc/intra-doc-crate/additional_doc.rs
+++ b/src/test/rustdoc/intra-doc-crate/additional_doc.rs
@@ -1,5 +1,7 @@
 // aux-build:additional_doc.rs
 // build-aux-docs
+#![deny(intra_doc_resolution_failure)]
+
 extern crate rand;
 
 // @has 'additional_doc/trait.Rng.html' '//a[@href="../additional_doc/trait.Rng.html"]' 'Rng'
diff --git a/src/test/rustdoc/intra-doc-crate/auxiliary/additional_doc.rs b/src/test/rustdoc/intra-doc-crate/auxiliary/additional_doc.rs
index 9d0a9882289e..46aca95095fd 100644
--- a/src/test/rustdoc/intra-doc-crate/auxiliary/additional_doc.rs
+++ b/src/test/rustdoc/intra-doc-crate/auxiliary/additional_doc.rs
@@ -1,4 +1,5 @@
 #![crate_name = "rand"]
+#![deny(intra_doc_resolution_failure)]
 
 pub trait RngCore {}
 /// Rng extends [`RngCore`].
diff --git a/src/test/rustdoc/intra-doc-crate/auxiliary/intra-doc-basic.rs b/src/test/rustdoc/intra-doc-crate/auxiliary/intra-doc-basic.rs
index 7f5609bcf528..8c83633424fd 100644
--- a/src/test/rustdoc/intra-doc-crate/auxiliary/intra-doc-basic.rs
+++ b/src/test/rustdoc/intra-doc-crate/auxiliary/intra-doc-basic.rs
@@ -1,4 +1,6 @@
 #![crate_name = "a"]
+#![deny(intra_doc_resolution_failure)]
+
 pub struct Foo;
 
 /// Link to [Foo]
diff --git a/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-inner.rs b/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-inner.rs
index 2258bb1956ce..73073ebff140 100644
--- a/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-inner.rs
+++ b/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-inner.rs
@@ -1,4 +1,5 @@
 #![crate_name = "a"]
+#![deny(intra_doc_resolution_failure)]
 
 pub mod bar {
    pub struct Bar;
diff --git a/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-outer.rs b/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-outer.rs
index dfc8685f3842..c045d6488f46 100644
--- a/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-outer.rs
+++ b/src/test/rustdoc/intra-doc-crate/auxiliary/submodule-outer.rs
@@ -1,4 +1,5 @@
 #![crate_name = "bar"]
+#![deny(intra_doc_resolution_failure)]
 
 pub trait Foo {
     /// [`Bar`] [`Baz`]
diff --git a/src/test/rustdoc/intra-doc-crate/basic.rs b/src/test/rustdoc/intra-doc-crate/basic.rs
index 3fb72b2b497f..6b6757b94e36 100644
--- a/src/test/rustdoc/intra-doc-crate/basic.rs
+++ b/src/test/rustdoc/intra-doc-crate/basic.rs
@@ -1,5 +1,6 @@
 // aux-build:intra-doc-basic.rs
 // build-aux-docs
+#![deny(intra_doc_resolution_failure)]
 
 // from https://github.com/rust-lang/rust/issues/65983
 extern crate a;
diff --git a/src/test/rustdoc/intra-doc-crate/submodule-inner.rs b/src/test/rustdoc/intra-doc-crate/submodule-inner.rs
index ab508c8792d3..e83d258c1df3 100644
--- a/src/test/rustdoc/intra-doc-crate/submodule-inner.rs
+++ b/src/test/rustdoc/intra-doc-crate/submodule-inner.rs
@@ -1,5 +1,7 @@
 // aux-build:submodule-inner.rs
 // build-aux-docs
+#![deny(intra_doc_resolution_failure)]
+
 extern crate a;
 
 // @has 'submodule_inner/struct.Foo.html' '//a[@href="../a/bar/struct.Bar.html"]' 'Bar'
diff --git a/src/test/rustdoc/intra-doc-crate/submodule-outer.rs b/src/test/rustdoc/intra-doc-crate/submodule-outer.rs
index 3ce92cacfc24..ccf226e1dfd0 100644
--- a/src/test/rustdoc/intra-doc-crate/submodule-outer.rs
+++ b/src/test/rustdoc/intra-doc-crate/submodule-outer.rs
@@ -1,5 +1,7 @@
 // aux-build:submodule-outer.rs
 // edition:2018
+#![deny(intra_doc_resolution_failure)]
+
 extern crate bar as bar_;
 
 // from https://github.com/rust-lang/rust/issues/60883