diff --git a/tests/ui/README.md b/tests/ui/README.md
index 237cfb9c4f07..612661dae907 100644
--- a/tests/ui/README.md
+++ b/tests/ui/README.md
@@ -518,10 +518,6 @@ The `dyn` keyword is used to highlight that calls to methods on the associated T
 
 See [`dyn` keyword](https://doc.rust-lang.org/std/keyword.dyn.html).
 
-## `tests/ui/dynamically-sized-types`: Dynamically Sized Types
-
-**FIXME**: should be coalesced with `tests/ui/dst`.
-
 ## `tests/ui/editions/`: Rust edition-specific peculiarities
 
 These tests run in specific Rust editions, such as Rust 2015 or Rust 2018, and check errors and functionality related to specific now-deprecated idioms and features.
diff --git a/tests/ui/dynamically-sized-types/dst-coerce-custom.rs b/tests/ui/dst/dst-coerce-custom.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-coerce-custom.rs
rename to tests/ui/dst/dst-coerce-custom.rs
diff --git a/tests/ui/dynamically-sized-types/dst-coerce-rc.rs b/tests/ui/dst/dst-coerce-rc.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-coerce-rc.rs
rename to tests/ui/dst/dst-coerce-rc.rs
diff --git a/tests/ui/dynamically-sized-types/dst-coercions.rs b/tests/ui/dst/dst-coercions.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-coercions.rs
rename to tests/ui/dst/dst-coercions.rs
diff --git a/tests/ui/dynamically-sized-types/dst-coercions.stderr b/tests/ui/dst/dst-coercions.stderr
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-coercions.stderr
rename to tests/ui/dst/dst-coercions.stderr
diff --git a/tests/ui/dynamically-sized-types/dst-deref-mut.rs b/tests/ui/dst/dst-deref-mut.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-deref-mut.rs
rename to tests/ui/dst/dst-deref-mut.rs
diff --git a/tests/ui/dynamically-sized-types/dst-deref.rs b/tests/ui/dst/dst-deref.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-deref.rs
rename to tests/ui/dst/dst-deref.rs
diff --git a/tests/ui/dynamically-sized-types/dst-field-align.rs b/tests/ui/dst/dst-field-align.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-field-align.rs
rename to tests/ui/dst/dst-field-align.rs
diff --git a/tests/ui/dst/dst-index.rs b/tests/ui/dst/dst-index-fail.rs
similarity index 100%
rename from tests/ui/dst/dst-index.rs
rename to tests/ui/dst/dst-index-fail.rs
diff --git a/tests/ui/dst/dst-index.stderr b/tests/ui/dst/dst-index-fail.stderr
similarity index 85%
rename from tests/ui/dst/dst-index.stderr
rename to tests/ui/dst/dst-index-fail.stderr
index d38af3f89c21..a5481e9ad673 100644
--- a/tests/ui/dst/dst-index.stderr
+++ b/tests/ui/dst/dst-index-fail.stderr
@@ -1,23 +1,23 @@
 error[E0161]: cannot move a value of type `str`
-  --> $DIR/dst-index.rs:31:5
+  --> $DIR/dst-index-fail.rs:31:5
    |
 LL |     S[0];
    |     ^^^^ the size of `str` cannot be statically determined
 
 error[E0161]: cannot move a value of type `dyn Debug`
-  --> $DIR/dst-index.rs:34:5
+  --> $DIR/dst-index-fail.rs:34:5
    |
 LL |     T[0];
    |     ^^^^ the size of `dyn Debug` cannot be statically determined
 
 error[E0507]: cannot move out of index of `S`
-  --> $DIR/dst-index.rs:31:5
+  --> $DIR/dst-index-fail.rs:31:5
    |
 LL |     S[0];
    |     ^^^^ move occurs because value has type `str`, which does not implement the `Copy` trait
 
 error[E0507]: cannot move out of index of `T`
-  --> $DIR/dst-index.rs:34:5
+  --> $DIR/dst-index-fail.rs:34:5
    |
 LL |     T[0];
    |     ^^^^ move occurs because value has type `dyn Debug`, which does not implement the `Copy` trait
diff --git a/tests/ui/dynamically-sized-types/dst-index.rs b/tests/ui/dst/dst-index-success.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-index.rs
rename to tests/ui/dst/dst-index-success.rs
diff --git a/tests/ui/dynamically-sized-types/dst-irrefutable-bind.rs b/tests/ui/dst/dst-irrefutable-bind.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-irrefutable-bind.rs
rename to tests/ui/dst/dst-irrefutable-bind.rs
diff --git a/tests/ui/dynamically-sized-types/dst-raw.rs b/tests/ui/dst/dst-raw.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-raw.rs
rename to tests/ui/dst/dst-raw.rs
diff --git a/tests/ui/dynamically-sized-types/dst-struct-sole.rs b/tests/ui/dst/dst-struct-sole.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-struct-sole.rs
rename to tests/ui/dst/dst-struct-sole.rs
diff --git a/tests/ui/dynamically-sized-types/dst-struct.rs b/tests/ui/dst/dst-struct.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-struct.rs
rename to tests/ui/dst/dst-struct.rs
diff --git a/tests/ui/dynamically-sized-types/dst-trait.rs b/tests/ui/dst/dst-trait.rs
similarity index 100%
rename from tests/ui/dynamically-sized-types/dst-trait.rs
rename to tests/ui/dst/dst-trait.rs