diff --git a/Cargo.toml b/Cargo.toml
index 5b62e387ac63..cf810798d8cc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ anstream = "0.6.0"
 
 [dev-dependencies]
 cargo_metadata = "0.18.1"
-ui_test = "0.25"
+ui_test = "0.26.4"
 regex = "1.5.5"
 serde = { version = "1.0.145", features = ["derive"] }
 serde_json = "1.0.122"
diff --git a/tests/compile-test.rs b/tests/compile-test.rs
index 9754254cdd0d..c7243348ce46 100644
--- a/tests/compile-test.rs
+++ b/tests/compile-test.rs
@@ -13,7 +13,6 @@ use test_utils::IS_RUSTC_TEST_SUITE;
 use ui_test::custom_flags::rustfix::RustfixMode;
 use ui_test::custom_flags::Flag;
 use ui_test::spanned::Spanned;
-use ui_test::test_result::TestRun;
 use ui_test::{status_emitter, Args, CommandBuilder, Config, Match, OutputConflictHandling};
 
 use std::collections::{BTreeMap, HashMap};
@@ -469,15 +468,14 @@ fn applicability_ord(applicability: &Applicability) -> u8 {
 impl Flag for DiagnosticCollector {
     fn post_test_action(
         &self,
-        _config: &ui_test::per_test_config::TestConfig<'_>,
-        _cmd: &mut std::process::Command,
+        _config: &ui_test::per_test_config::TestConfig,
         output: &std::process::Output,
-        _build_manager: &ui_test::build_manager::BuildManager<'_>,
-    ) -> Result<Vec<TestRun>, ui_test::Errored> {
+        _build_manager: &ui_test::build_manager::BuildManager,
+    ) -> Result<(), ui_test::Errored> {
         if !output.stderr.is_empty() {
             self.sender.send(output.stderr.clone()).unwrap();
         }
-        Ok(Vec::new())
+        Ok(())
     }
 
     fn clone_inner(&self) -> Box<dyn Flag> {
diff --git a/tests/ui/asm_syntax_not_x86.rs b/tests/ui/asm_syntax_not_x86.rs
index 33cea4806814..a7d29cc239e5 100644
--- a/tests/ui/asm_syntax_not_x86.rs
+++ b/tests/ui/asm_syntax_not_x86.rs
@@ -1,5 +1,4 @@
-//@ignore-target-i686
-//@ignore-target-x86
+//@ignore-target: i686 x86
 //@needs-asm-support
 
 #[warn(clippy::inline_asm_x86_intel_syntax)]
diff --git a/tests/ui/asm_syntax_x86.rs b/tests/ui/asm_syntax_x86.rs
index 835943b43894..5ceaceb7527b 100644
--- a/tests/ui/asm_syntax_x86.rs
+++ b/tests/ui/asm_syntax_x86.rs
@@ -1,6 +1,4 @@
-//@revisions: i686 x86_64
-//@[i686] only-target-i686
-//@[x86_64] only-target-x86_64
+//@only-target: i686 x86_64
 
 #[warn(clippy::inline_asm_x86_intel_syntax)]
 mod warn_intel {
diff --git a/tests/ui/asm_syntax_x86.stderr b/tests/ui/asm_syntax_x86.stderr
new file mode 100644
index 000000000000..1911ef66e239
--- /dev/null
+++ b/tests/ui/asm_syntax_x86.stderr
@@ -0,0 +1,70 @@
+error: Intel x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:8:9
+   |
+LL |         asm!("");
+   |         ^^^^^^^^
+   |
+   = help: use AT&T x86 assembly syntax
+   = note: `-D clippy::inline-asm-x86-intel-syntax` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::inline_asm_x86_intel_syntax)]`
+
+error: Intel x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:10:9
+   |
+LL |         asm!("", options());
+   |         ^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use AT&T x86 assembly syntax
+
+error: Intel x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:12:9
+   |
+LL |         asm!("", options(nostack));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use AT&T x86 assembly syntax
+
+error: Intel x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:18:5
+   |
+LL |     global_asm!("");
+   |     ^^^^^^^^^^^^^^^
+   |
+   = help: use AT&T x86 assembly syntax
+
+error: Intel x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:20:5
+   |
+LL |     global_asm!("", options());
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use AT&T x86 assembly syntax
+
+error: AT&T x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:33:9
+   |
+LL |         asm!("", options(att_syntax));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use Intel x86 assembly syntax
+   = note: `-D clippy::inline-asm-x86-att-syntax` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::inline_asm_x86_att_syntax)]`
+
+error: AT&T x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:35:9
+   |
+LL |         asm!("", options(nostack, att_syntax));
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use Intel x86 assembly syntax
+
+error: AT&T x86 assembly syntax used
+  --> tests/ui/asm_syntax_x86.rs:41:5
+   |
+LL |     global_asm!("", options(att_syntax));
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = help: use Intel x86 assembly syntax
+
+error: aborting due to 8 previous errors
+
diff --git a/tests/ui/crashes/ice-7410.rs b/tests/ui/crashes/ice-7410.rs
index a2683b3ce340..ccf6d7ff94f2 100644
--- a/tests/ui/crashes/ice-7410.rs
+++ b/tests/ui/crashes/ice-7410.rs
@@ -1,6 +1,5 @@
 //@compile-flags: -Clink-arg=-nostartfiles
-//@ignore-target-apple
-//@ignore-target-windows
+//@ignore-target: apple windows
 
 #![feature(lang_items, start, libc)]
 #![no_std]
diff --git a/tests/ui/crate_level_checks/entrypoint_recursion.rs b/tests/ui/crate_level_checks/entrypoint_recursion.rs
index aa76688d8010..5d853d97bc35 100644
--- a/tests/ui/crate_level_checks/entrypoint_recursion.rs
+++ b/tests/ui/crate_level_checks/entrypoint_recursion.rs
@@ -1,4 +1,4 @@
-//@ignore-target-apple
+//@ignore-target: apple
 
 #![feature(rustc_attrs)]
 
diff --git a/tests/ui/crate_level_checks/no_std_main_recursion.rs b/tests/ui/crate_level_checks/no_std_main_recursion.rs
index 32eba9695920..9e5b2a489034 100644
--- a/tests/ui/crate_level_checks/no_std_main_recursion.rs
+++ b/tests/ui/crate_level_checks/no_std_main_recursion.rs
@@ -1,5 +1,5 @@
 //@compile-flags: -Clink-arg=-nostartfiles
-//@ignore-target-apple
+//@ignore-target: apple
 
 #![feature(lang_items, start, libc)]
 #![no_std]
diff --git a/tests/ui/def_id_nocore.rs b/tests/ui/def_id_nocore.rs
index 190d636ebf34..c9650312db87 100644
--- a/tests/ui/def_id_nocore.rs
+++ b/tests/ui/def_id_nocore.rs
@@ -1,4 +1,4 @@
-//@ignore-target-apple
+//@ignore-target: apple
 
 #![feature(no_core, lang_items, start)]
 #![no_core]
diff --git a/tests/ui/empty_loop_no_std.rs b/tests/ui/empty_loop_no_std.rs
index 5fe32351ed45..1bb895bda75d 100644
--- a/tests/ui/empty_loop_no_std.rs
+++ b/tests/ui/empty_loop_no_std.rs
@@ -1,5 +1,5 @@
 //@compile-flags: -Clink-arg=-nostartfiles
-//@ignore-target-apple
+//@ignore-target: apple
 
 #![warn(clippy::empty_loop)]
 #![feature(lang_items, start, libc)]
diff --git a/tests/ui/enum_clike_unportable_variant.rs b/tests/ui/enum_clike_unportable_variant.rs
index c50404c5047b..37849179d6a0 100644
--- a/tests/ui/enum_clike_unportable_variant.rs
+++ b/tests/ui/enum_clike_unportable_variant.rs
@@ -1,4 +1,4 @@
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #![warn(clippy::enum_clike_unportable_variant)]
 #![allow(unused, non_upper_case_globals)]
diff --git a/tests/ui/macro_use_imports.fixed b/tests/ui/macro_use_imports.fixed
index 38ed5a957e73..28844fab7479 100644
--- a/tests/ui/macro_use_imports.fixed
+++ b/tests/ui/macro_use_imports.fixed
@@ -2,7 +2,7 @@
 //@aux-build:macro_use_helper.rs
 //@aux-build:proc_macro_derive.rs
 
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #![allow(unused_imports, unreachable_code, unused_variables, dead_code, unused_attributes)]
 #![allow(clippy::single_component_path_imports)]
diff --git a/tests/ui/macro_use_imports.rs b/tests/ui/macro_use_imports.rs
index ae6cc16ed276..5381f2959898 100644
--- a/tests/ui/macro_use_imports.rs
+++ b/tests/ui/macro_use_imports.rs
@@ -2,7 +2,7 @@
 //@aux-build:macro_use_helper.rs
 //@aux-build:proc_macro_derive.rs
 
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #![allow(unused_imports, unreachable_code, unused_variables, dead_code, unused_attributes)]
 #![allow(clippy::single_component_path_imports)]
diff --git a/tests/ui/macro_use_imports_expect.rs b/tests/ui/macro_use_imports_expect.rs
index df6d5b9fbabf..60cce1d24a28 100644
--- a/tests/ui/macro_use_imports_expect.rs
+++ b/tests/ui/macro_use_imports_expect.rs
@@ -1,7 +1,7 @@
 //@aux-build:macro_rules.rs
 //@aux-build:macro_use_helper.rs
 //@aux-build:proc_macro_derive.rs
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #![allow(unused_imports, unreachable_code, unused_variables, dead_code, unused_attributes)]
 #![allow(clippy::single_component_path_imports)]
diff --git a/tests/ui/mixed_attributes_style.rs b/tests/ui/mixed_attributes_style.rs
index 1a646c265223..93ab9392cf8b 100644
--- a/tests/ui/mixed_attributes_style.rs
+++ b/tests/ui/mixed_attributes_style.rs
@@ -82,7 +82,8 @@ mod issue_12530 {
             #![allow(dead_code)]
         }
     }
-    /// Nested mod //~ ERROR: item has both inner and outer attributes
+    /// Nested mod
+    //~^ ERROR: item has both inner and outer attributes
     #[allow(unused)]
     mod nest_mod_2 {
         #![allow(unused)]
diff --git a/tests/ui/mixed_attributes_style.stderr b/tests/ui/mixed_attributes_style.stderr
index a1d3fc430f6c..abdc2df23cf1 100644
--- a/tests/ui/mixed_attributes_style.stderr
+++ b/tests/ui/mixed_attributes_style.stderr
@@ -46,13 +46,14 @@ error: item has both inner and outer attributes
   --> tests/ui/mixed_attributes_style.rs:85:5
    |
 LL | /     /// Nested mod
+LL | |
 LL | |     #[allow(unused)]
 LL | |     mod nest_mod_2 {
 LL | |         #![allow(unused)]
    | |_________________________^
 
 error: item has both inner and outer attributes
-  --> tests/ui/mixed_attributes_style.rs:90:9
+  --> tests/ui/mixed_attributes_style.rs:91:9
    |
 LL | /         #[allow(dead_code)]
 LL | |         mod inner_mod {
diff --git a/tests/ui/non_octal_unix_permissions.fixed b/tests/ui/non_octal_unix_permissions.fixed
index 237f5f5b97a4..f68d5e30d27e 100644
--- a/tests/ui/non_octal_unix_permissions.fixed
+++ b/tests/ui/non_octal_unix_permissions.fixed
@@ -1,4 +1,4 @@
-//@ignore-target-windows
+//@ignore-target: windows
 
 #![warn(clippy::non_octal_unix_permissions)]
 use std::fs::{DirBuilder, File, OpenOptions, Permissions};
diff --git a/tests/ui/non_octal_unix_permissions.rs b/tests/ui/non_octal_unix_permissions.rs
index c8da5dbcec28..647c3769d2c3 100644
--- a/tests/ui/non_octal_unix_permissions.rs
+++ b/tests/ui/non_octal_unix_permissions.rs
@@ -1,4 +1,4 @@
-//@ignore-target-windows
+//@ignore-target: windows
 
 #![warn(clippy::non_octal_unix_permissions)]
 use std::fs::{DirBuilder, File, OpenOptions, Permissions};
diff --git a/tests/ui/result_large_err.rs b/tests/ui/result_large_err.rs
index b25348bf9961..9c39f023da2d 100644
--- a/tests/ui/result_large_err.rs
+++ b/tests/ui/result_large_err.rs
@@ -1,4 +1,4 @@
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #![warn(clippy::result_large_err)]
 #![allow(clippy::large_enum_variant)]
diff --git a/tests/ui/single_call_fn.rs b/tests/ui/single_call_fn.rs
index 55e7508a9573..a0597664da55 100644
--- a/tests/ui/single_call_fn.rs
+++ b/tests/ui/single_call_fn.rs
@@ -1,4 +1,4 @@
-//@ignore-32bit
+//@ignore-bitwidth: 32
 //@aux-build:proc_macros.rs
 #![allow(clippy::redundant_closure_call, unused)]
 #![warn(clippy::single_call_fn)]
diff --git a/tests/ui/transmute_32bit.rs b/tests/ui/transmute_32bit.rs
index 8e1316ca39d4..e162bbb2d929 100644
--- a/tests/ui/transmute_32bit.rs
+++ b/tests/ui/transmute_32bit.rs
@@ -1,4 +1,4 @@
-//@ignore-64bit
+//@ignore-bitwidth: 64
 
 #[warn(clippy::wrong_transmute)]
 fn main() {
diff --git a/tests/ui/transmute_64bit.rs b/tests/ui/transmute_64bit.rs
index 767cc503a39d..fd0ad74bcfa0 100644
--- a/tests/ui/transmute_64bit.rs
+++ b/tests/ui/transmute_64bit.rs
@@ -1,4 +1,4 @@
-//@ignore-32bit
+//@ignore-bitwidth: 32
 
 #[warn(clippy::wrong_transmute)]
 fn main() {