diff --git a/tests/ui/traits/deref-chain-method-calls.rs b/tests/ui/autoref-autoderef/deref-chain-method-calls-13264.rs
similarity index 93%
rename from tests/ui/traits/deref-chain-method-calls.rs
rename to tests/ui/autoref-autoderef/deref-chain-method-calls-13264.rs
index bf4ec388c4fd..f471c1c7eefc 100644
--- a/tests/ui/traits/deref-chain-method-calls.rs
+++ b/tests/ui/autoref-autoderef/deref-chain-method-calls-13264.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13264
+
 //@ run-pass
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
diff --git a/tests/ui/block-result/blocks-without-results.rs b/tests/ui/block-result/blocks-without-results-11709.rs
similarity index 91%
rename from tests/ui/block-result/blocks-without-results.rs
rename to tests/ui/block-result/blocks-without-results-11709.rs
index 8a11074eca8e..97ea6f9e19ed 100644
--- a/tests/ui/block-result/blocks-without-results.rs
+++ b/tests/ui/block-result/blocks-without-results-11709.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11709
+
 //@ run-pass
 #![allow(dead_code)]
 
diff --git a/tests/ui/threads/moved-value-in-thread-loop.rs b/tests/ui/borrowck/moved-value-in-thread-loop-12041.rs
similarity index 78%
rename from tests/ui/threads/moved-value-in-thread-loop.rs
rename to tests/ui/borrowck/moved-value-in-thread-loop-12041.rs
index 091e8fe8b2a6..98f9cdbdef79 100644
--- a/tests/ui/threads/moved-value-in-thread-loop.rs
+++ b/tests/ui/borrowck/moved-value-in-thread-loop-12041.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12041
+
 use std::sync::mpsc::channel;
 use std::thread;
 
diff --git a/tests/ui/issues/issue-12041.stderr b/tests/ui/borrowck/moved-value-in-thread-loop-12041.stderr
similarity index 87%
rename from tests/ui/issues/issue-12041.stderr
rename to tests/ui/borrowck/moved-value-in-thread-loop-12041.stderr
index f2c10b833836..627dd193dade 100644
--- a/tests/ui/issues/issue-12041.stderr
+++ b/tests/ui/borrowck/moved-value-in-thread-loop-12041.stderr
@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `tx`
-  --> $DIR/issue-12041.rs:8:22
+  --> $DIR/moved-value-in-thread-loop-12041.rs:10:22
    |
 LL |             let tx = tx;
    |                      ^^ value moved here, in previous iteration of loop
diff --git a/tests/ui/borrowck/refcell-borrow-comparison.rs b/tests/ui/borrowck/refcell-borrow-comparison-12033.rs
similarity index 61%
rename from tests/ui/borrowck/refcell-borrow-comparison.rs
rename to tests/ui/borrowck/refcell-borrow-comparison-12033.rs
index 0bf6490bafed..de22cedd5b94 100644
--- a/tests/ui/borrowck/refcell-borrow-comparison.rs
+++ b/tests/ui/borrowck/refcell-borrow-comparison-12033.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12033
+
 //@ run-pass
 use std::cell::RefCell;
 
diff --git a/tests/ui/match/string-literal-match-patterns.rs b/tests/ui/borrowck/string-literal-match-patterns-11869.rs
similarity index 75%
rename from tests/ui/match/string-literal-match-patterns.rs
rename to tests/ui/borrowck/string-literal-match-patterns-11869.rs
index dd752227bbec..4c159e457cf1 100644
--- a/tests/ui/match/string-literal-match-patterns.rs
+++ b/tests/ui/borrowck/string-literal-match-patterns-11869.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11869
+
 //@ check-pass
 #![allow(dead_code)]
 
diff --git a/tests/ui/closures/fnonce-moved-twice.rs b/tests/ui/closures/fnonce-moved-twice-12127.rs
similarity index 82%
rename from tests/ui/closures/fnonce-moved-twice.rs
rename to tests/ui/closures/fnonce-moved-twice-12127.rs
index 199d542e816f..369ddcafaabd 100644
--- a/tests/ui/closures/fnonce-moved-twice.rs
+++ b/tests/ui/closures/fnonce-moved-twice-12127.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12127
+
 #![feature(unboxed_closures, tuple_trait)]
 
 fn to_fn_once<A:std::marker::Tuple,F:FnOnce<A>>(f: F) -> F { f }
diff --git a/tests/ui/issues/issue-12127.stderr b/tests/ui/closures/fnonce-moved-twice-12127.stderr
similarity index 62%
rename from tests/ui/issues/issue-12127.stderr
rename to tests/ui/closures/fnonce-moved-twice-12127.stderr
index 2a6233547ee8..c2e12827527b 100644
--- a/tests/ui/issues/issue-12127.stderr
+++ b/tests/ui/closures/fnonce-moved-twice-12127.stderr
@@ -1,5 +1,5 @@
 error[E0382]: use of moved value: `f`
-  --> $DIR/issue-12127.rs:11:9
+  --> $DIR/fnonce-moved-twice-12127.rs:13:9
    |
 LL |         f();
    |         --- `f` moved due to this call
@@ -7,11 +7,11 @@ LL |         f();
    |         ^ value used here after move
    |
 note: this value implements `FnOnce`, which causes it to be moved when called
-  --> $DIR/issue-12127.rs:10:9
+  --> $DIR/fnonce-moved-twice-12127.rs:12:9
    |
 LL |         f();
    |         ^
-   = note: move occurs because `f` has type `{closure@$DIR/issue-12127.rs:8:24: 8:30}`, which does not implement the `Copy` trait
+   = note: move occurs because `f` has type `{closure@$DIR/fnonce-moved-twice-12127.rs:10:24: 10:30}`, which does not implement the `Copy` trait
 
 error: aborting due to 1 previous error
 
diff --git a/tests/ui/closures/moved-upvar-mut-rebind.rs b/tests/ui/closures/moved-upvar-mut-rebind-11958.rs
similarity index 78%
rename from tests/ui/closures/moved-upvar-mut-rebind.rs
rename to tests/ui/closures/moved-upvar-mut-rebind-11958.rs
index 9185c5158af6..701dc1a2cefd 100644
--- a/tests/ui/closures/moved-upvar-mut-rebind.rs
+++ b/tests/ui/closures/moved-upvar-mut-rebind-11958.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11958
+
 //@ run-pass
 
 // We shouldn't need to rebind a moved upvar as mut if it's already
diff --git a/tests/ui/issues/issue-11958.stderr b/tests/ui/closures/moved-upvar-mut-rebind-11958.stderr
similarity index 84%
rename from tests/ui/issues/issue-11958.stderr
rename to tests/ui/closures/moved-upvar-mut-rebind-11958.stderr
index 5dca4c2f01d5..b12bbcad9258 100644
--- a/tests/ui/issues/issue-11958.stderr
+++ b/tests/ui/closures/moved-upvar-mut-rebind-11958.stderr
@@ -1,5 +1,5 @@
 warning: value assigned to `x` is never read
-  --> $DIR/issue-11958.rs:8:36
+  --> $DIR/moved-upvar-mut-rebind-11958.rs:10:36
    |
 LL |     let _thunk = Box::new(move|| { x = 2; });
    |                                    ^
@@ -8,7 +8,7 @@ LL |     let _thunk = Box::new(move|| { x = 2; });
    = note: `#[warn(unused_assignments)]` on by default
 
 warning: unused variable: `x`
-  --> $DIR/issue-11958.rs:8:36
+  --> $DIR/moved-upvar-mut-rebind-11958.rs:10:36
    |
 LL |     let _thunk = Box::new(move|| { x = 2; });
    |                                    ^
diff --git a/tests/ui/traits/any-trait-object-debug.rs b/tests/ui/coercion/any-trait-object-debug-12744.rs
similarity index 62%
rename from tests/ui/traits/any-trait-object-debug.rs
rename to tests/ui/coercion/any-trait-object-debug-12744.rs
index eaf92d413d57..4d981c077ee2 100644
--- a/tests/ui/traits/any-trait-object-debug.rs
+++ b/tests/ui/coercion/any-trait-object-debug-12744.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12744
+
 //@ run-pass
 fn main() {
     fn test() -> Box<dyn std::any::Any + 'static> { Box::new(1) }
diff --git a/tests/ui/collections/hashset-connected-border.rs b/tests/ui/collections/hashset-connected-border-12860.rs
similarity index 95%
rename from tests/ui/collections/hashset-connected-border.rs
rename to tests/ui/collections/hashset-connected-border-12860.rs
index 255f66707937..40185bef7c8d 100644
--- a/tests/ui/collections/hashset-connected-border.rs
+++ b/tests/ui/collections/hashset-connected-border-12860.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12860
+
 //@ run-pass
 use std::collections::HashSet;
 
diff --git a/tests/ui/const-generics/vec-macro-in-static-array.rs b/tests/ui/const-generics/vec-macro-in-static-array.rs
index 9f1fc42774fb..7a81836e2556 100644
--- a/tests/ui/const-generics/vec-macro-in-static-array.rs
+++ b/tests/ui/const-generics/vec-macro-in-static-array.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13446
+
 // Used to cause ICE
 
 static VEC: [u32; 256] = vec![];
diff --git a/tests/ui/issues/issue-13446.stderr b/tests/ui/const-generics/vec-macro-in-static-array.stderr
similarity index 90%
rename from tests/ui/issues/issue-13446.stderr
rename to tests/ui/const-generics/vec-macro-in-static-array.stderr
index 28c459e6e62c..de21f2274f3a 100644
--- a/tests/ui/issues/issue-13446.stderr
+++ b/tests/ui/const-generics/vec-macro-in-static-array.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-13446.rs:3:26
+  --> $DIR/vec-macro-in-static-array.rs:5:26
    |
 LL | static VEC: [u32; 256] = vec![];
    |                          ^^^^^^ expected `[u32; 256]`, found `Vec<_>`
diff --git a/tests/ui/extern/format-message-windows-ffi.rs b/tests/ui/extern/format-message-windows-ffi.rs
deleted file mode 100644
index 381e3f152590..000000000000
--- a/tests/ui/extern/format-message-windows-ffi.rs
+++ /dev/null
@@ -1,39 +0,0 @@
-//@ run-pass
-
-#[cfg(windows)]
-mod imp {
-    type LPVOID = *mut u8;
-    type DWORD = u32;
-    type LPWSTR = *mut u16;
-
-    extern "system" {
-        fn FormatMessageW(flags: DWORD,
-                          lpSrc: LPVOID,
-                          msgId: DWORD,
-                          langId: DWORD,
-                          buf: LPWSTR,
-                          nsize: DWORD,
-                          args: *const u8)
-                          -> DWORD;
-    }
-
-    pub fn test() {
-        let mut buf: [u16; 50] = [0; 50];
-        let ret = unsafe {
-            FormatMessageW(0x1000, core::ptr::null_mut(), 1, 0x400,
-                           buf.as_mut_ptr(), buf.len() as u32, core::ptr::null())
-        };
-        // On some 32-bit Windowses (Win7-8 at least) this will panic with segmented
-        // stacks taking control of pvArbitrary
-        assert!(ret != 0);
-    }
-}
-
-#[cfg(not(windows))]
-mod imp {
-    pub fn test() { }
-}
-
-fn main() {
-    imp::test()
-}
diff --git a/tests/ui/extern/windows-tcb-trash-13259.rs b/tests/ui/extern/windows-tcb-trash-13259.rs
new file mode 100644
index 000000000000..0852e31251ac
--- /dev/null
+++ b/tests/ui/extern/windows-tcb-trash-13259.rs
@@ -0,0 +1,49 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13259
+
+//@ run-pass
+
+#[cfg(windows)]
+mod imp {
+    type LPVOID = *mut u8;
+    type DWORD = u32;
+    type LPWSTR = *mut u16;
+
+    extern "system" {
+        fn FormatMessageW(
+            flags: DWORD,
+            lpSrc: LPVOID,
+            msgId: DWORD,
+            langId: DWORD,
+            buf: LPWSTR,
+            nsize: DWORD,
+            args: *const u8,
+        ) -> DWORD;
+    }
+
+    pub fn test() {
+        let mut buf: [u16; 50] = [0; 50];
+        let ret = unsafe {
+            FormatMessageW(
+                0x1000,
+                core::ptr::null_mut(),
+                1,
+                0x400,
+                buf.as_mut_ptr(),
+                buf.len() as u32,
+                core::ptr::null(),
+            )
+        };
+        // On some 32-bit Windowses (Win7-8 at least) this will panic with segmented
+        // stacks taking control of pvArbitrary
+        assert!(ret != 0);
+    }
+}
+
+#[cfg(not(windows))]
+mod imp {
+    pub fn test() {}
+}
+
+fn main() {
+    imp::test()
+}
diff --git a/tests/ui/fn/anonymous-parameters-trait.rs b/tests/ui/fn/anonymous-parameters-trait-13105.rs
similarity index 61%
rename from tests/ui/fn/anonymous-parameters-trait.rs
rename to tests/ui/fn/anonymous-parameters-trait-13105.rs
index d119aa9c788d..171dab15fe71 100644
--- a/tests/ui/fn/anonymous-parameters-trait.rs
+++ b/tests/ui/fn/anonymous-parameters-trait-13105.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13105
+
 //@ edition: 2015
 //@ check-pass
 
diff --git a/tests/ui/iterators/bytes-iterator-clone.rs b/tests/ui/iterators/bytes-iterator-clone-12677.rs
similarity index 71%
rename from tests/ui/iterators/bytes-iterator-clone.rs
rename to tests/ui/iterators/bytes-iterator-clone-12677.rs
index dbc2dbc85276..cfbb85a3ecba 100644
--- a/tests/ui/iterators/bytes-iterator-clone.rs
+++ b/tests/ui/iterators/bytes-iterator-clone-12677.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12677
+
 //@ run-pass
 
 fn main() {
diff --git a/tests/ui/lifetimes/iterator-trait-lifetime-error.rs b/tests/ui/lifetimes/iterator-trait-lifetime-error-13058.rs
similarity index 90%
rename from tests/ui/lifetimes/iterator-trait-lifetime-error.rs
rename to tests/ui/lifetimes/iterator-trait-lifetime-error-13058.rs
index a5806feb720d..6cfe440b43d7 100644
--- a/tests/ui/lifetimes/iterator-trait-lifetime-error.rs
+++ b/tests/ui/lifetimes/iterator-trait-lifetime-error-13058.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13058
+
 use std::ops::Range;
 
 trait Itble<'r, T, I: Iterator<Item=T>> { fn iter(&'r self) -> I; }
diff --git a/tests/ui/issues/issue-13058.stderr b/tests/ui/lifetimes/iterator-trait-lifetime-error-13058.stderr
similarity index 90%
rename from tests/ui/issues/issue-13058.stderr
rename to tests/ui/lifetimes/iterator-trait-lifetime-error-13058.stderr
index 4f4108fa1825..e6564e36b215 100644
--- a/tests/ui/issues/issue-13058.stderr
+++ b/tests/ui/lifetimes/iterator-trait-lifetime-error-13058.stderr
@@ -1,5 +1,5 @@
 error[E0621]: explicit lifetime required in the type of `cont`
-  --> $DIR/issue-13058.rs:14:21
+  --> $DIR/iterator-trait-lifetime-error-13058.rs:16:21
    |
 LL |     let cont_iter = cont.iter();
    |                     ^^^^^^^^^^^ lifetime `'r` required
diff --git a/tests/ui/iterators/phf-map-entries-iterator.rs b/tests/ui/lifetimes/lifetime-inference-destructuring-arg.rs
similarity index 88%
rename from tests/ui/iterators/phf-map-entries-iterator.rs
rename to tests/ui/lifetimes/lifetime-inference-destructuring-arg.rs
index 5f733e859488..7a019a71d75c 100644
--- a/tests/ui/iterators/phf-map-entries-iterator.rs
+++ b/tests/ui/lifetimes/lifetime-inference-destructuring-arg.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13167
+
 //@ check-pass
 //@ revisions: current next
 //@ ignore-compare-mode-next-solver (explicit revisions)
diff --git a/tests/ui/traits/matcher-trait-equality.rs b/tests/ui/lifetimes/matcher-trait-equality-13323.rs
similarity index 93%
rename from tests/ui/traits/matcher-trait-equality.rs
rename to tests/ui/lifetimes/matcher-trait-equality-13323.rs
index 8f334404f9ab..efd56294b398 100644
--- a/tests/ui/traits/matcher-trait-equality.rs
+++ b/tests/ui/lifetimes/matcher-trait-equality-13323.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13323
+
 //@ run-pass
 
 struct StrWrap {
diff --git a/tests/ui/lifetimes/struct-lifetime-field-assignment.rs b/tests/ui/lifetimes/struct-lifetime-field-assignment-13405.rs
similarity index 79%
rename from tests/ui/lifetimes/struct-lifetime-field-assignment.rs
rename to tests/ui/lifetimes/struct-lifetime-field-assignment-13405.rs
index 80b298d2f37a..9482d89681b5 100644
--- a/tests/ui/lifetimes/struct-lifetime-field-assignment.rs
+++ b/tests/ui/lifetimes/struct-lifetime-field-assignment-13405.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13405
+
 //@ check-pass
 #![allow(dead_code)]
 #![allow(unused_variables)]
diff --git a/tests/ui/unsafe/unsafe-transmute-in-find.rs b/tests/ui/lifetimes/unsafe-transmute-in-find-11740.rs
similarity index 87%
rename from tests/ui/unsafe/unsafe-transmute-in-find.rs
rename to tests/ui/lifetimes/unsafe-transmute-in-find-11740.rs
index c6099c2a0c04..eeecd2e9e404 100644
--- a/tests/ui/unsafe/unsafe-transmute-in-find.rs
+++ b/tests/ui/lifetimes/unsafe-transmute-in-find-11740.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11740
+
 //@ check-pass
 
 struct Attr {
diff --git a/tests/ui/match/option-result-mismatch.rs b/tests/ui/match/option-result-mismatch-11844.rs
similarity index 69%
rename from tests/ui/match/option-result-mismatch.rs
rename to tests/ui/match/option-result-mismatch-11844.rs
index f974a4702960..24a2004134df 100644
--- a/tests/ui/match/option-result-mismatch.rs
+++ b/tests/ui/match/option-result-mismatch-11844.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11844
+
 fn main() {
     let a = Some(Box::new(1));
     match a {
diff --git a/tests/ui/issues/issue-11844.stderr b/tests/ui/match/option-result-mismatch-11844.stderr
similarity index 90%
rename from tests/ui/issues/issue-11844.stderr
rename to tests/ui/match/option-result-mismatch-11844.stderr
index 9ff66eaef498..8a84b7b8a486 100644
--- a/tests/ui/issues/issue-11844.stderr
+++ b/tests/ui/match/option-result-mismatch-11844.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-11844.rs:4:9
+  --> $DIR/option-result-mismatch-11844.rs:6:9
    |
 LL |     match a {
    |           - this expression has type `Option<Box<{integer}>>`
diff --git a/tests/ui/match/option-result-type-param-mismatch.rs b/tests/ui/match/option-result-type-param-mismatch-13466.rs
similarity index 91%
rename from tests/ui/match/option-result-type-param-mismatch.rs
rename to tests/ui/match/option-result-type-param-mismatch-13466.rs
index 78ce4c1d2f60..05dbdfdee0e3 100644
--- a/tests/ui/match/option-result-type-param-mismatch.rs
+++ b/tests/ui/match/option-result-type-param-mismatch-13466.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13466
+
 // Regression test for #13466
 
 //@ dont-require-annotations: NOTE
diff --git a/tests/ui/issues/issue-13466.stderr b/tests/ui/match/option-result-type-param-mismatch-13466.stderr
similarity index 87%
rename from tests/ui/issues/issue-13466.stderr
rename to tests/ui/match/option-result-type-param-mismatch-13466.stderr
index 68a555a16260..b0cf1591f5ee 100644
--- a/tests/ui/issues/issue-13466.stderr
+++ b/tests/ui/match/option-result-type-param-mismatch-13466.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-13466.rs:10:9
+  --> $DIR/option-result-type-param-mismatch-13466.rs:12:9
    |
 LL |     let _x: usize = match Some(1) {
    |                           ------- this expression has type `Option<{integer}>`
@@ -10,7 +10,7 @@ LL |         Ok(u) => u,
               found enum `Result<_, _>`
 
 error[E0308]: mismatched types
-  --> $DIR/issue-13466.rs:16:9
+  --> $DIR/option-result-type-param-mismatch-13466.rs:18:9
    |
 LL |     let _x: usize = match Some(1) {
    |                           ------- this expression has type `Option<{integer}>`
diff --git a/tests/ui/match/guard-literal-range-shadow.rs b/tests/ui/match/overeager-sub-match-pruning-13027.rs
similarity index 97%
rename from tests/ui/match/guard-literal-range-shadow.rs
rename to tests/ui/match/overeager-sub-match-pruning-13027.rs
index fbd1d75067b5..c4feb697f7d1 100644
--- a/tests/ui/match/guard-literal-range-shadow.rs
+++ b/tests/ui/match/overeager-sub-match-pruning-13027.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13027
+
 //@ run-pass
 
 // Tests that match expression handles overlapped literal and range
diff --git a/tests/ui/match/slice-move-out-error.rs b/tests/ui/match/slice-move-out-error-12567.rs
similarity index 85%
rename from tests/ui/match/slice-move-out-error.rs
rename to tests/ui/match/slice-move-out-error-12567.rs
index 1b2a37de4753..3f9bf9c76cf3 100644
--- a/tests/ui/match/slice-move-out-error.rs
+++ b/tests/ui/match/slice-move-out-error-12567.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12567
+
 fn match_vecs<'a, T>(l1: &'a [T], l2: &'a [T]) {
     match (l1, l2) {
     //~^ ERROR: cannot move out of type `[T]`, a non-copy slice
diff --git a/tests/ui/issues/issue-12567.stderr b/tests/ui/match/slice-move-out-error-12567.stderr
similarity index 94%
rename from tests/ui/issues/issue-12567.stderr
rename to tests/ui/match/slice-move-out-error-12567.stderr
index 0b19299ece3e..ab5377d47013 100644
--- a/tests/ui/issues/issue-12567.stderr
+++ b/tests/ui/match/slice-move-out-error-12567.stderr
@@ -1,5 +1,5 @@
 error[E0508]: cannot move out of type `[T]`, a non-copy slice
-  --> $DIR/issue-12567.rs:2:11
+  --> $DIR/slice-move-out-error-12567.rs:4:11
    |
 LL |     match (l1, l2) {
    |           ^^^^^^^^ cannot move out of here
@@ -23,7 +23,7 @@ LL +         (&[hd1, ..], [hd2, ..])
    |
 
 error[E0508]: cannot move out of type `[T]`, a non-copy slice
-  --> $DIR/issue-12567.rs:2:11
+  --> $DIR/slice-move-out-error-12567.rs:4:11
    |
 LL |     match (l1, l2) {
    |           ^^^^^^^^ cannot move out of here
diff --git a/tests/ui/match/struct-reference-patterns.rs b/tests/ui/match/struct-reference-patterns-12285.rs
similarity index 73%
rename from tests/ui/match/struct-reference-patterns.rs
rename to tests/ui/match/struct-reference-patterns-12285.rs
index fe199147128b..246e230b0de7 100644
--- a/tests/ui/match/struct-reference-patterns.rs
+++ b/tests/ui/match/struct-reference-patterns-12285.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12285
+
 //@ run-pass
 
 struct S;
diff --git a/tests/ui/panics/explicit-panic-unreachable.rs b/tests/ui/parser/encode-symbol-ice-12920.rs
similarity index 63%
rename from tests/ui/panics/explicit-panic-unreachable.rs
rename to tests/ui/parser/encode-symbol-ice-12920.rs
index f3b1b643c45a..87389c0ffb42 100644
--- a/tests/ui/panics/explicit-panic-unreachable.rs
+++ b/tests/ui/parser/encode-symbol-ice-12920.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12920
+
 //@ run-fail
 //@ error-pattern:explicit panic
 //@ needs-subprocess
diff --git a/tests/ui/privacy/private-unit-struct-assignment.rs b/tests/ui/privacy/private-unit-struct-assignment.rs
index 7794be37b850..b8e1c4ecb188 100644
--- a/tests/ui/privacy/private-unit-struct-assignment.rs
+++ b/tests/ui/privacy/private-unit-struct-assignment.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13407
+
 mod A {
     struct C;
 }
diff --git a/tests/ui/issues/issue-13407.stderr b/tests/ui/privacy/private-unit-struct-assignment.stderr
similarity index 79%
rename from tests/ui/issues/issue-13407.stderr
rename to tests/ui/privacy/private-unit-struct-assignment.stderr
index ac2eb6581fe2..8c36a08846d8 100644
--- a/tests/ui/issues/issue-13407.stderr
+++ b/tests/ui/privacy/private-unit-struct-assignment.stderr
@@ -1,17 +1,17 @@
 error[E0603]: unit struct `C` is private
-  --> $DIR/issue-13407.rs:6:8
+  --> $DIR/private-unit-struct-assignment.rs:8:8
    |
 LL |     A::C = 1;
    |        ^ private unit struct
    |
 note: the unit struct `C` is defined here
-  --> $DIR/issue-13407.rs:2:5
+  --> $DIR/private-unit-struct-assignment.rs:4:5
    |
 LL |     struct C;
    |     ^^^^^^^^^
 
 error[E0308]: mismatched types
-  --> $DIR/issue-13407.rs:6:5
+  --> $DIR/private-unit-struct-assignment.rs:8:5
    |
 LL |     struct C;
    |     -------- unit struct defined here
diff --git a/tests/ui/imports/use-in-impl-scope.rs b/tests/ui/privacy/use-in-impl-scope-12729.rs
similarity index 68%
rename from tests/ui/imports/use-in-impl-scope.rs
rename to tests/ui/privacy/use-in-impl-scope-12729.rs
index 4d45846bc608..58fe042beece 100644
--- a/tests/ui/imports/use-in-impl-scope.rs
+++ b/tests/ui/privacy/use-in-impl-scope-12729.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12729
+
 //@ edition: 2015
 //@ check-pass
 #![allow(dead_code)]
diff --git a/tests/ui/traits/reference-clone-noclone.rs b/tests/ui/resolve/reference-clone-nonclone-11820.rs
similarity index 73%
rename from tests/ui/traits/reference-clone-noclone.rs
rename to tests/ui/resolve/reference-clone-nonclone-11820.rs
index ada844f8ee12..74dad96da94e 100644
--- a/tests/ui/traits/reference-clone-noclone.rs
+++ b/tests/ui/resolve/reference-clone-nonclone-11820.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11820
+
 //@ run-pass
 
 #![allow(noop_method_call)]
diff --git a/tests/ui/statics/enum-with-static-str-variant.rs b/tests/ui/statics/enum-with-static-str-variant-13214.rs
similarity index 81%
rename from tests/ui/statics/enum-with-static-str-variant.rs
rename to tests/ui/statics/enum-with-static-str-variant-13214.rs
index 8140ec943a01..1db37da632de 100644
--- a/tests/ui/statics/enum-with-static-str-variant.rs
+++ b/tests/ui/statics/enum-with-static-str-variant-13214.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13214
+
 //@ build-pass
 #![allow(dead_code)]
 // defining static with struct that contains enum
diff --git a/tests/ui/traits/default-method-lifetime-params.rs b/tests/ui/traits/default-method-lifetime-params-13204.rs
similarity index 88%
rename from tests/ui/traits/default-method-lifetime-params.rs
rename to tests/ui/traits/default-method-lifetime-params-13204.rs
index 01362f6fe61d..cdf34ab773c1 100644
--- a/tests/ui/traits/default-method-lifetime-params.rs
+++ b/tests/ui/traits/default-method-lifetime-params-13204.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13204
+
 //@ run-pass
 #![allow(unused_mut)]
 // Test that when instantiating trait default methods, typeck handles
diff --git a/tests/ui/traits/fnonce-repro-trait-impl.rs b/tests/ui/traits/fnonce-repro-trait-impl-13434.rs
similarity index 84%
rename from tests/ui/traits/fnonce-repro-trait-impl.rs
rename to tests/ui/traits/fnonce-repro-trait-impl-13434.rs
index caf7b6323933..61d5a1d74aee 100644
--- a/tests/ui/traits/fnonce-repro-trait-impl.rs
+++ b/tests/ui/traits/fnonce-repro-trait-impl-13434.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13434
+
 //@ run-pass
 #[derive(Debug)]
 struct MyStruct;
diff --git a/tests/ui/type-inference/type-collect-inference.rs b/tests/ui/type-inference/partial-type-hint-12909.rs
similarity index 86%
rename from tests/ui/type-inference/type-collect-inference.rs
rename to tests/ui/type-inference/partial-type-hint-12909.rs
index f2c33806aae8..d7017f451e32 100644
--- a/tests/ui/type-inference/type-collect-inference.rs
+++ b/tests/ui/type-inference/partial-type-hint-12909.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12909
+
 //@ run-pass
 #![allow(unused_variables)]
 
diff --git a/tests/ui/match/function-in-pattern-error.rs b/tests/ui/typeck/function-in-pattern-error-12863.rs
similarity index 71%
rename from tests/ui/match/function-in-pattern-error.rs
rename to tests/ui/typeck/function-in-pattern-error-12863.rs
index 1ac1c3d818e5..d2fa25556584 100644
--- a/tests/ui/match/function-in-pattern-error.rs
+++ b/tests/ui/typeck/function-in-pattern-error-12863.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/12863
+
 mod foo { pub fn bar() {} }
 
 fn main() {
diff --git a/tests/ui/issues/issue-12863.stderr b/tests/ui/typeck/function-in-pattern-error-12863.stderr
similarity index 85%
rename from tests/ui/issues/issue-12863.stderr
rename to tests/ui/typeck/function-in-pattern-error-12863.stderr
index 95d4a704e72d..f28874b5d485 100644
--- a/tests/ui/issues/issue-12863.stderr
+++ b/tests/ui/typeck/function-in-pattern-error-12863.stderr
@@ -1,5 +1,5 @@
 error[E0532]: expected unit struct, unit variant or constant, found function `foo::bar`
-  --> $DIR/issue-12863.rs:5:9
+  --> $DIR/function-in-pattern-error-12863.rs:7:9
    |
 LL |         foo::bar => {}
    |         ^^^^^^^^ not a unit struct, unit variant or constant
diff --git a/tests/ui/type-inference/isize-usize-mismatch-error.rs b/tests/ui/typeck/isize-usize-mismatch-error.rs
similarity index 80%
rename from tests/ui/type-inference/isize-usize-mismatch-error.rs
rename to tests/ui/typeck/isize-usize-mismatch-error.rs
index 5d31d7f861c6..2fb5cf489c03 100644
--- a/tests/ui/type-inference/isize-usize-mismatch-error.rs
+++ b/tests/ui/typeck/isize-usize-mismatch-error.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13359
+
 //@ dont-require-annotations: NOTE
 
 fn foo(_s: i16) { }
diff --git a/tests/ui/issues/issue-13359.stderr b/tests/ui/typeck/isize-usize-mismatch-error.stderr
similarity index 85%
rename from tests/ui/issues/issue-13359.stderr
rename to tests/ui/typeck/isize-usize-mismatch-error.stderr
index 91f5de8e8f3a..d5724665a03c 100644
--- a/tests/ui/issues/issue-13359.stderr
+++ b/tests/ui/typeck/isize-usize-mismatch-error.stderr
@@ -1,5 +1,5 @@
 error[E0308]: mismatched types
-  --> $DIR/issue-13359.rs:8:9
+  --> $DIR/isize-usize-mismatch-error.rs:10:9
    |
 LL |     foo(1*(1 as isize));
    |     --- ^^^^^^^^^^^^^^ expected `i16`, found `isize`
@@ -7,7 +7,7 @@ LL |     foo(1*(1 as isize));
    |     arguments to this function are incorrect
    |
 note: function defined here
-  --> $DIR/issue-13359.rs:3:4
+  --> $DIR/isize-usize-mismatch-error.rs:5:4
    |
 LL | fn foo(_s: i16) { }
    |    ^^^ -------
@@ -17,7 +17,7 @@ LL |     foo((1*(1 as isize)).try_into().unwrap());
    |         +              +++++++++++++++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/issue-13359.rs:12:9
+  --> $DIR/isize-usize-mismatch-error.rs:14:9
    |
 LL |     bar(1*(1 as usize));
    |     --- ^^^^^^^^^^^^^^ expected `u32`, found `usize`
@@ -25,7 +25,7 @@ LL |     bar(1*(1 as usize));
    |     arguments to this function are incorrect
    |
 note: function defined here
-  --> $DIR/issue-13359.rs:5:4
+  --> $DIR/isize-usize-mismatch-error.rs:7:4
    |
 LL | fn bar(_s: u32) { }
    |    ^^^ -------
diff --git a/tests/ui/type-inference/unit-type-add-error.rs b/tests/ui/typeck/unit-type-add-error-11771.rs
similarity index 63%
rename from tests/ui/type-inference/unit-type-add-error.rs
rename to tests/ui/typeck/unit-type-add-error-11771.rs
index c69cd1e79e37..d009f50f4b92 100644
--- a/tests/ui/type-inference/unit-type-add-error.rs
+++ b/tests/ui/typeck/unit-type-add-error-11771.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11771
+
 fn main() {
     let x = ();
     1 +
diff --git a/tests/ui/issues/issue-11771.stderr b/tests/ui/typeck/unit-type-add-error-11771.stderr
similarity index 93%
rename from tests/ui/issues/issue-11771.stderr
rename to tests/ui/typeck/unit-type-add-error-11771.stderr
index 5603dc18b635..155cc0935245 100644
--- a/tests/ui/issues/issue-11771.stderr
+++ b/tests/ui/typeck/unit-type-add-error-11771.stderr
@@ -1,5 +1,5 @@
 error[E0277]: cannot add `()` to `{integer}`
-  --> $DIR/issue-11771.rs:3:7
+  --> $DIR/unit-type-add-error-11771.rs:5:7
    |
 LL |     1 +
    |       ^ no implementation for `{integer} + ()`
@@ -17,7 +17,7 @@ LL |     1 +
            and 56 others
 
 error[E0277]: cannot add `()` to `{integer}`
-  --> $DIR/issue-11771.rs:8:7
+  --> $DIR/unit-type-add-error-11771.rs:10:7
    |
 LL |     1 +
    |       ^ no implementation for `{integer} + ()`
diff --git a/tests/ui/panics/unwrap-or-panic-input.rs b/tests/ui/typeck/unwrap-or-panic-input-13202.rs
similarity index 65%
rename from tests/ui/panics/unwrap-or-panic-input.rs
rename to tests/ui/typeck/unwrap-or-panic-input-13202.rs
index 99ffba3fba51..29833a727c55 100644
--- a/tests/ui/panics/unwrap-or-panic-input.rs
+++ b/tests/ui/typeck/unwrap-or-panic-input-13202.rs
@@ -1,3 +1,5 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/13202
+
 //@ run-fail
 //@ error-pattern:bad input
 //@ needs-subprocess