diff --git a/tests/rustdoc/inline_cross/auxiliary/default-generic-args.rs b/tests/rustdoc/inline_cross/auxiliary/default-generic-args.rs
index 1e31f18927e..c2c94817fad 100644
--- a/tests/rustdoc/inline_cross/auxiliary/default-generic-args.rs
+++ b/tests/rustdoc/inline_cross/auxiliary/default-generic-args.rs
@@ -40,6 +40,11 @@
 
 pub type M0 = Multi<u64, ()>;
 
-pub trait Trait<'a, T = &'a ()> {}
+pub trait Trait0<'a, T = &'a ()> {}
+pub type D0 = dyn for<'a> Trait0<'a>;
 
-pub type F = dyn for<'a> Trait<'a>;
+// Regression test for issue #119529.
+pub trait Trait1<T = (), const K: u32 = 0> {}
+pub type D1<T> = dyn Trait1<T>;
+pub type D2<const K: u32> = dyn Trait1<(), K>;
+pub type D3 = dyn Trait1;
diff --git a/tests/rustdoc/inline_cross/auxiliary/u_default_generic_args.rs b/tests/rustdoc/inline_cross/auxiliary/u_default_generic_args.rs
new file mode 100644
index 00000000000..a742dd7d865
--- /dev/null
+++ b/tests/rustdoc/inline_cross/auxiliary/u_default_generic_args.rs
@@ -0,0 +1 @@
+pub use default_generic_args::*;
diff --git a/tests/rustdoc/inline_cross/default-generic-args.rs b/tests/rustdoc/inline_cross/default-generic-args.rs
index c9a87a19901..775bf041532 100644
--- a/tests/rustdoc/inline_cross/default-generic-args.rs
+++ b/tests/rustdoc/inline_cross/default-generic-args.rs
@@ -79,15 +79,14 @@
 pub use default_generic_args::P2;
 
 // @has user/type.A0.html
-// Ensure that we elide generic arguments that are alpha-equivalent to their respective
-// generic parameter (modulo substs) (#1):
-// @has - '//*[@class="rust item-decl"]//code' "Alpha"
+// @has - '//*[@class="rust item-decl"]//code' "Alpha;"
 pub use default_generic_args::A0;
 
 // @has user/type.A1.html
-// Ensure that we elide generic arguments that are alpha-equivalent to their respective
-// generic parameter (modulo substs) (#1):
-// @has - '//*[@class="rust item-decl"]//code' "Alpha"
+// Demonstrates that we currently don't elide generic arguments that are alpha-equivalent to their
+// respective generic parameter (after instantiation) for perf reasons (it would require us to
+// create an inference context).
+// @has - '//*[@class="rust item-decl"]//code' "Alpha<for<'arbitrary> fn(_: &'arbitrary ())>"
 pub use default_generic_args::A1;
 
 // @has user/type.M0.html
@@ -97,8 +96,19 @@
 // @has - '//*[@class="rust item-decl"]//code' "Multi<u64, ()>"
 pub use default_generic_args::M0;
 
-// @has user/type.F.html
-// FIXME: Ideally, we would elide `&'a ()` but `'a` is an escaping bound var which we can't reason
-//        about at the moment since we don't keep track of bound vars.
-// @has - '//*[@class="rust item-decl"]//code' "dyn for<'a> Trait<'a, &'a ()>"
-pub use default_generic_args::F;
+// @has user/type.D0.html
+// @has - '//*[@class="rust item-decl"]//code' "dyn for<'a> Trait0<'a>"
+pub use default_generic_args::D0;
+
+// Regression test for issue #119529.
+// Check that we correctly elide def ty&const args inside trait object types.
+
+// @has user/type.D1.html
+// @has - '//*[@class="rust item-decl"]//code' "dyn Trait1<T>"
+pub use default_generic_args::D1;
+// @has user/type.D2.html
+// @has - '//*[@class="rust item-decl"]//code' "dyn Trait1<(), K>"
+pub use default_generic_args::D2;
+// @has user/type.D3.html
+// @has - '//*[@class="rust item-decl"]//code' "dyn Trait1;"
+pub use default_generic_args::D3;