tests: use `needs-subprocess` instead of `ignore-{wasm32,emscripten,sgx}`

156 files changed, 170 insertions, 200 deletions

diff --git a/tests/ui/abi/homogenous-floats-target-feature-mixup.rs b/tests/ui/abi/homogenous-floats-target-feature-mixup.rs
index 4afb710b193..22b9b029a40 100644
--- a/tests/ui/abi/homogenous-floats-target-feature-mixup.rs
+++ b/tests/ui/abi/homogenous-floats-target-feature-mixup.rs
@@ -5,8 +5,7 @@
 // without #[repr(simd)]
 
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 #![feature(avx512_target_feature)]
 
diff --git a/tests/ui/abi/segfault-no-out-of-stack.rs b/tests/ui/abi/segfault-no-out-of-stack.rs
index 113c82c30e9..b5af13ebfb5 100644
--- a/tests/ui/abi/segfault-no-out-of-stack.rs
+++ b/tests/ui/abi/segfault-no-out-of-stack.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 can't run commands
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia must translate zircon signal to SIGSEGV/SIGBUS, FIXME (#58590)
 
 #![feature(rustc_private)]
diff --git a/tests/ui/abi/stack-probes-lto.rs b/tests/ui/abi/stack-probes-lto.rs
index e6c26c5c4de..c6e5bea5f42 100644
--- a/tests/ui/abi/stack-probes-lto.rs
+++ b/tests/ui/abi/stack-probes-lto.rs
@@ -3,7 +3,7 @@
 //@[aarch64] only-aarch64
 //@[x32] only-x86
 //@[x64] only-x86_64
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-musl FIXME #31506
 //@ ignore-fuchsia no exception handler registered for segfault
 //@ compile-flags: -C lto
diff --git a/tests/ui/abi/stack-probes.rs b/tests/ui/abi/stack-probes.rs
index 1c0e50250d7..f0fbd80d2e7 100644
--- a/tests/ui/abi/stack-probes.rs
+++ b/tests/ui/abi/stack-probes.rs
@@ -3,8 +3,7 @@
 //@[aarch64] only-aarch64
 //@[x32] only-x86
 //@[x64] only-x86_64
-//@ ignore-emscripten no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia no exception handler registered for segfault
 //@ ignore-nto Crash analysis impossible at SIGSEGV in QNX Neutrino
 //@ ignore-ios Stack probes are enabled, but the SIGSEGV handler isn't
diff --git a/tests/ui/alloc-error/default-alloc-error-hook.rs b/tests/ui/alloc-error/default-alloc-error-hook.rs
index 5f977460b8c..7fbc66ca5f4 100644
--- a/tests/ui/alloc-error/default-alloc-error-hook.rs
+++ b/tests/ui/alloc-error/default-alloc-error-hook.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::alloc::{Layout, handle_alloc_error};
 use std::env;
diff --git a/tests/ui/array-slice-vec/bounds-check-no-overflow.rs b/tests/ui/array-slice-vec/bounds-check-no-overflow.rs
index 4614df44084..c5ff805a853 100644
--- a/tests/ui/array-slice-vec/bounds-check-no-overflow.rs
+++ b/tests/ui/array-slice-vec/bounds-check-no-overflow.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::mem::size_of;
 
diff --git a/tests/ui/array-slice-vec/dst-raw-slice.rs b/tests/ui/array-slice-vec/dst-raw-slice.rs
index f1281f4e302..ab9dedc139d 100644
--- a/tests/ui/array-slice-vec/dst-raw-slice.rs
+++ b/tests/ui/array-slice-vec/dst-raw-slice.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:index out of bounds
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[allow(unconditional_panic)]
 fn main() {
diff --git a/tests/ui/array-slice-vec/vec-overrun.rs b/tests/ui/array-slice-vec/vec-overrun.rs
index 10f8350869f..3b3e9215279 100644
--- a/tests/ui/array-slice-vec/vec-overrun.rs
+++ b/tests/ui/array-slice-vec/vec-overrun.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 1 but the index is 2
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let v: Vec<isize> = vec![10];
diff --git a/tests/ui/backtrace/backtrace.rs b/tests/ui/backtrace/backtrace.rs
index 2579ff5203b..487473f4393 100644
--- a/tests/ui/backtrace/backtrace.rs
+++ b/tests/ui/backtrace/backtrace.rs
@@ -1,8 +1,7 @@
 //@ run-pass
 //@ ignore-android FIXME #17520
-//@ ignore-wasm32 spawning processes is not supported
+//@ needs-subprocess
 //@ ignore-openbsd no support for libbacktrace without filename
-//@ ignore-sgx no processes
 //@ ignore-msvc see #62897 and `backtrace-debuginfo.rs` test
 //@ ignore-fuchsia Backtraces not symbolized
 //@ compile-flags:-g
diff --git a/tests/ui/backtrace/std-backtrace.rs b/tests/ui/backtrace/std-backtrace.rs
index 57d953a8640..7ccbd46152b 100644
--- a/tests/ui/backtrace/std-backtrace.rs
+++ b/tests/ui/backtrace/std-backtrace.rs
@@ -1,8 +1,7 @@
 //@ run-pass
 //@ ignore-android FIXME #17520
-//@ ignore-wasm32 spawning processes is not supported
+//@ needs-subprocess
 //@ ignore-openbsd no support for libbacktrace without filename
-//@ ignore-sgx no processes
 //@ ignore-fuchsia Backtraces not symbolized
 //@ compile-flags:-g
 //@ compile-flags:-Cstrip=none
diff --git a/tests/ui/binop/binop-fail-3.rs b/tests/ui/binop/binop-fail-3.rs
index b1e70a1c596..4e8d7e92ab6 100644
--- a/tests/ui/binop/binop-fail-3.rs
+++ b/tests/ui/binop/binop-fail-3.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:quux
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn foo() -> ! {
     panic!("quux");
diff --git a/tests/ui/binop/binop-panic.rs b/tests/ui/binop/binop-panic.rs
index 8dbf62a922e..8173eb0d689 100644
--- a/tests/ui/binop/binop-panic.rs
+++ b/tests/ui/binop/binop-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:quux
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn my_err(s: String) -> ! {
     println!("{}", s);
diff --git a/tests/ui/borrowck/borrowck-local-borrow.rs b/tests/ui/borrowck/borrowck-local-borrow.rs
index de6ee5983c8..4d22503e37b 100644
--- a/tests/ui/borrowck/borrowck-local-borrow.rs
+++ b/tests/ui/borrowck/borrowck-local-borrow.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:panic 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let x = 2;
diff --git a/tests/ui/borrowck/issue-28934.rs b/tests/ui/borrowck/issue-28934.rs
index a3ac663c5b5..64559d4cf1d 100644
--- a/tests/ui/borrowck/issue-28934.rs
+++ b/tests/ui/borrowck/issue-28934.rs
@@ -3,7 +3,7 @@
 
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 struct Parser<'i: 't, 't>(&'i u8, &'t u8);
 
diff --git a/tests/ui/closures/diverging-closure.rs b/tests/ui/closures/diverging-closure.rs
index dda829d8af4..2c86f55cf25 100644
--- a/tests/ui/closures/diverging-closure.rs
+++ b/tests/ui/closures/diverging-closure.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:oops
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let func = || -> ! {
diff --git a/tests/ui/command/command-current-dir.rs b/tests/ui/command/command-current-dir.rs
index 23269e41231..e264cbe4d70 100644
--- a/tests/ui/command/command-current-dir.rs
+++ b/tests/ui/command/command-current-dir.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 //@ no-prefer-dynamic We move the binary around, so do not depend dynamically on libstd
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia Needs directory creation privilege
 
 use std::env;
diff --git a/tests/ui/command/command-uid-gid.rs b/tests/ui/command/command-uid-gid.rs
index 7a70a0fbd76..f54a0f50708 100644
--- a/tests/ui/command/command-uid-gid.rs
+++ b/tests/ui/command/command-uid-gid.rs
@@ -1,8 +1,7 @@
 //@ run-pass
 //@ ignore-android
-//@ ignore-emscripten
-//@ ignore-sgx
 //@ ignore-fuchsia no '/bin/sh', '/bin/ls'
+//@ needs-subprocess
 
 #![feature(rustc_private)]
 
diff --git a/tests/ui/command/issue-10626.rs b/tests/ui/command/issue-10626.rs
index f8dbb011513..d2679ec9e29 100644
--- a/tests/ui/command/issue-10626.rs
+++ b/tests/ui/command/issue-10626.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 // Make sure that if a process doesn't have its stdio/stderr descriptors set up
 // that we don't die in a large ball of fire
diff --git a/tests/ui/consts/issue-29798.rs b/tests/ui/consts/issue-29798.rs
index bdabbad6491..f7470d7aac9 100644
--- a/tests/ui/consts/issue-29798.rs
+++ b/tests/ui/consts/issue-29798.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 5 but the index is 5
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 const fn test(x: usize) -> i32 {
     [42;5][x]
diff --git a/tests/ui/coroutine/coroutine-resume-after-panic.rs b/tests/ui/coroutine/coroutine-resume-after-panic.rs
index 2745ebc6132..1aa547c2a7b 100644
--- a/tests/ui/coroutine/coroutine-resume-after-panic.rs
+++ b/tests/ui/coroutine/coroutine-resume-after-panic.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ needs-unwind
 //@ error-pattern:coroutine resumed after panicking
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 // Test that we get the correct message for resuming a panicked coroutine.
 
diff --git a/tests/ui/expr/if/expr-if-panic-fn.rs b/tests/ui/expr/if/expr-if-panic-fn.rs
index 4f3d7fd48e3..0b4742d4a89 100644
--- a/tests/ui/expr/if/expr-if-panic-fn.rs
+++ b/tests/ui/expr/if/expr-if-panic-fn.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f() -> ! {
     panic!()
diff --git a/tests/ui/expr/if/expr-if-panic.rs b/tests/ui/expr/if/expr-if-panic.rs
index 0b43d1d6b00..2f35878e844 100644
--- a/tests/ui/expr/if/expr-if-panic.rs
+++ b/tests/ui/expr/if/expr-if-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let _x = if false {
diff --git a/tests/ui/expr/if/if-check-panic.rs b/tests/ui/expr/if/if-check-panic.rs
index 4b400deaca4..eb0413f42fc 100644
--- a/tests/ui/expr/if/if-check-panic.rs
+++ b/tests/ui/expr/if/if-check-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:Number is odd
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn even(x: usize) -> bool {
     if x < 2 {
diff --git a/tests/ui/expr/if/if-cond-bot.rs b/tests/ui/expr/if/if-cond-bot.rs
index ddb5559ffca..56bd5ec35f9 100644
--- a/tests/ui/expr/if/if-cond-bot.rs
+++ b/tests/ui/expr/if/if-cond-bot.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:quux
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn my_err(s: String) -> ! {
     println!("{}", s);
diff --git a/tests/ui/extern/issue-18576.rs b/tests/ui/extern/issue-18576.rs
index 0a98e85e484..6b41fe73631 100644
--- a/tests/ui/extern/issue-18576.rs
+++ b/tests/ui/extern/issue-18576.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:stop
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 // #18576
 // Make sure that calling an extern function pointer in an unreachable
diff --git a/tests/ui/fn/expr-fn-panic.rs b/tests/ui/fn/expr-fn-panic.rs
index 23946b7533d..d726aac2a4c 100644
--- a/tests/ui/fn/expr-fn-panic.rs
+++ b/tests/ui/fn/expr-fn-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f() -> ! {
     panic!()
diff --git a/tests/ui/hashmap/hashmap-capacity-overflow.rs b/tests/ui/hashmap/hashmap-capacity-overflow.rs
index 91aebc3bbba..502dbe9fa93 100644
--- a/tests/ui/hashmap/hashmap-capacity-overflow.rs
+++ b/tests/ui/hashmap/hashmap-capacity-overflow.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:capacity overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::collections::hash_map::HashMap;
 use std::mem::size_of;
diff --git a/tests/ui/imports/glob-use-std.rs b/tests/ui/imports/glob-use-std.rs
index b625543da81..d2af816e24f 100644
--- a/tests/ui/imports/glob-use-std.rs
+++ b/tests/ui/imports/glob-use-std.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:panic works
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::*;
 
diff --git a/tests/ui/intrinsics/panic-uninitialized-zeroed.rs b/tests/ui/intrinsics/panic-uninitialized-zeroed.rs
index 67b9832d601..346a94c37dd 100644
--- a/tests/ui/intrinsics/panic-uninitialized-zeroed.rs
+++ b/tests/ui/intrinsics/panic-uninitialized-zeroed.rs
@@ -1,11 +1,10 @@
+// ignore-tidy-linelength
+//! This test checks panic emitted from `mem::{uninitialized,zeroed}`.
 //@ run-pass
 //@ revisions: default strict
 //@ [strict]compile-flags: -Zstrict-init-checks
-// ignore-tidy-linelength
-//@ ignore-wasm32 spawning processes is not supported
-//@ ignore-sgx no processes
-//
-// This test checks panic emitted from `mem::{uninitialized,zeroed}`.
+//@ needs-subprocess
+
 #![allow(deprecated, invalid_value)]
 #![feature(never_type)]
 
diff --git a/tests/ui/issues/issue-12920.rs b/tests/ui/issues/issue-12920.rs
index 7f453e499d4..f3b1b643c45 100644
--- a/tests/ui/issues/issue-12920.rs
+++ b/tests/ui/issues/issue-12920.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 pub fn main() {
     panic!();
diff --git a/tests/ui/issues/issue-13202.rs b/tests/ui/issues/issue-13202.rs
index 89205fc7fd1..99ffba3fba5 100644
--- a/tests/ui/issues/issue-13202.rs
+++ b/tests/ui/issues/issue-13202.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:bad input
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     Some("foo").unwrap_or(panic!("bad input")).to_string();
diff --git a/tests/ui/issues/issue-20971.rs b/tests/ui/issues/issue-20971.rs
index 377a3d9ea30..31dd9101919 100644
--- a/tests/ui/issues/issue-20971.rs
+++ b/tests/ui/issues/issue-20971.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:Hello, world!
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 pub trait Parser {
     type Input;
diff --git a/tests/ui/issues/issue-23354-2.rs b/tests/ui/issues/issue-23354-2.rs
index 90de1276cc6..a296477215e 100644
--- a/tests/ui/issues/issue-23354-2.rs
+++ b/tests/ui/issues/issue-23354-2.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:panic evaluated
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[allow(unused_variables)]
 fn main() {
diff --git a/tests/ui/issues/issue-23354.rs b/tests/ui/issues/issue-23354.rs
index 31783842dac..eff5f3d2714 100644
--- a/tests/ui/issues/issue-23354.rs
+++ b/tests/ui/issues/issue-23354.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:panic evaluated
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[allow(unused_variables)]
 fn main() {
diff --git a/tests/ui/issues/issue-2470-bounds-check-overflow.rs b/tests/ui/issues/issue-2470-bounds-check-overflow.rs
index 241bc8fda9c..4f300454dcb 100644
--- a/tests/ui/issues/issue-2470-bounds-check-overflow.rs
+++ b/tests/ui/issues/issue-2470-bounds-check-overflow.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::mem;
 
diff --git a/tests/ui/issues/issue-2761.rs b/tests/ui/issues/issue-2761.rs
index b44a24e09f2..6df7a5118b8 100644
--- a/tests/ui/issues/issue-2761.rs
+++ b/tests/ui/issues/issue-2761.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:custom message
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(false, "custom message");
diff --git a/tests/ui/issues/issue-3029.rs b/tests/ui/issues/issue-3029.rs
index a070578969c..22d0906ccf7 100644
--- a/tests/ui/issues/issue-3029.rs
+++ b/tests/ui/issues/issue-3029.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:so long
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(unreachable_code)]
 
diff --git a/tests/ui/issues/issue-30380.rs b/tests/ui/issues/issue-30380.rs
index 534bb3423d0..49fce3d150c 100644
--- a/tests/ui/issues/issue-30380.rs
+++ b/tests/ui/issues/issue-30380.rs
@@ -3,7 +3,7 @@
 
 //@ run-fail
 //@ error-pattern:panicking destructors ftw!
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 struct Observer<'a>(&'a mut FilledOnDrop);
 
diff --git a/tests/ui/issues/issue-33770.rs b/tests/ui/issues/issue-33770.rs
index 0fa91ac91c4..814e8f37176 100644
--- a/tests/ui/issues/issue-33770.rs
+++ b/tests/ui/issues/issue-33770.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::process::{Command, Stdio};
 use std::env;
diff --git a/tests/ui/issues/issue-44216-add-system-time.rs b/tests/ui/issues/issue-44216-add-system-time.rs
index 207f72fade8..3838d28e33d 100644
--- a/tests/ui/issues/issue-44216-add-system-time.rs
+++ b/tests/ui/issues/issue-44216-add-system-time.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::time::{Duration, SystemTime};
 
diff --git a/tests/ui/issues/issue-44216-sub-instant.rs b/tests/ui/issues/issue-44216-sub-instant.rs
index 2457d2aaa04..19cd12e685f 100644
--- a/tests/ui/issues/issue-44216-sub-instant.rs
+++ b/tests/ui/issues/issue-44216-sub-instant.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::time::{Instant, Duration};
 
diff --git a/tests/ui/issues/issue-44216-sub-system-time.rs b/tests/ui/issues/issue-44216-sub-system-time.rs
index 7e33f227933..bd4f66f3e16 100644
--- a/tests/ui/issues/issue-44216-sub-system-time.rs
+++ b/tests/ui/issues/issue-44216-sub-system-time.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::time::{Duration, SystemTime};
 
diff --git a/tests/ui/lifetimes/tail-expr-lock-poisoning.rs b/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
index 6af6655149b..d7c7b2e2414 100644
--- a/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
+++ b/tests/ui/lifetimes/tail-expr-lock-poisoning.rs
@@ -1,5 +1,6 @@
 //@ revisions: edition2021 edition2024
-//@ ignore-wasm no panic or subprocess support
+//@ ignore-wasm no panic support
+//@ needs-subprocess
 //@ [edition2024] edition: 2024
 //@ run-pass
 //@ needs-unwind
diff --git a/tests/ui/loops/for-each-loop-panic.rs b/tests/ui/loops/for-each-loop-panic.rs
index 04784cac8f2..79cfca93e0e 100644
--- a/tests/ui/loops/for-each-loop-panic.rs
+++ b/tests/ui/loops/for-each-loop-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:moop
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     for _ in 0_usize..10_usize {
diff --git a/tests/ui/macros/assert-as-macro.rs b/tests/ui/macros/assert-as-macro.rs
index 391b056292f..c18a3d89fb6 100644
--- a/tests/ui/macros/assert-as-macro.rs
+++ b/tests/ui/macros/assert-as-macro.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:assertion failed: 1 == 2
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(1 == 2);
diff --git a/tests/ui/macros/assert-eq-macro-msg.rs b/tests/ui/macros/assert-eq-macro-msg.rs
index 39eeefeeef9..9ef7552cc7b 100644
--- a/tests/ui/macros/assert-eq-macro-msg.rs
+++ b/tests/ui/macros/assert-eq-macro-msg.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:assertion `left == right` failed: 1 + 1 definitely should be 3
 //@ error-pattern:  left: 2
 //@ error-pattern: right: 3
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert_eq!(1 + 1, 3, "1 + 1 definitely should be 3");
diff --git a/tests/ui/macros/assert-eq-macro-panic.rs b/tests/ui/macros/assert-eq-macro-panic.rs
index 22c3a8a634f..3c46e2798d1 100644
--- a/tests/ui/macros/assert-eq-macro-panic.rs
+++ b/tests/ui/macros/assert-eq-macro-panic.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:assertion `left == right` failed
 //@ error-pattern:  left: 14
 //@ error-pattern: right: 15
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert_eq!(14, 15);
diff --git a/tests/ui/macros/assert-macro-explicit.rs b/tests/ui/macros/assert-macro-explicit.rs
index 167581d2525..b14a182a876 100644
--- a/tests/ui/macros/assert-macro-explicit.rs
+++ b/tests/ui/macros/assert-macro-explicit.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:assertion failed: false
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(false);
diff --git a/tests/ui/macros/assert-macro-fmt.rs b/tests/ui/macros/assert-macro-fmt.rs
index 47554430379..3fd0f472d16 100644
--- a/tests/ui/macros/assert-macro-fmt.rs
+++ b/tests/ui/macros/assert-macro-fmt.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern: panicked
 //@ error-pattern: test-assert-fmt 42 rust
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(false, "test-assert-fmt {} {}", 42, "rust");
diff --git a/tests/ui/macros/assert-macro-owned.rs b/tests/ui/macros/assert-macro-owned.rs
index 46a59db1390..f9b6f5f5180 100644
--- a/tests/ui/macros/assert-macro-owned.rs
+++ b/tests/ui/macros/assert-macro-owned.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:test-assert-owned
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(non_fmt_panics)]
 
diff --git a/tests/ui/macros/assert-macro-static.rs b/tests/ui/macros/assert-macro-static.rs
index 7d9e345d516..8c91d7722fc 100644
--- a/tests/ui/macros/assert-macro-static.rs
+++ b/tests/ui/macros/assert-macro-static.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:test-assert-static
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(false, "test-assert-static");
diff --git a/tests/ui/macros/assert-matches-macro-msg.rs b/tests/ui/macros/assert-matches-macro-msg.rs
index efa4121da92..956bc9cf0f4 100644
--- a/tests/ui/macros/assert-matches-macro-msg.rs
+++ b/tests/ui/macros/assert-matches-macro-msg.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:assertion `left matches right` failed: 1 + 1 definitely should be 3
 //@ error-pattern:  left: 2
 //@ error-pattern: right: 3
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![feature(assert_matches)]
 
diff --git a/tests/ui/macros/assert-ne-macro-msg.rs b/tests/ui/macros/assert-ne-macro-msg.rs
index 0a578e1baf9..24bc4dbea47 100644
--- a/tests/ui/macros/assert-ne-macro-msg.rs
+++ b/tests/ui/macros/assert-ne-macro-msg.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:assertion `left != right` failed: 1 + 1 definitely should not be 2
 //@ error-pattern:  left: 2
 //@ error-pattern: right: 2
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert_ne!(1 + 1, 2, "1 + 1 definitely should not be 2");
diff --git a/tests/ui/macros/assert-ne-macro-panic.rs b/tests/ui/macros/assert-ne-macro-panic.rs
index 9cf5f05e9f1..c349825baf3 100644
--- a/tests/ui/macros/assert-ne-macro-panic.rs
+++ b/tests/ui/macros/assert-ne-macro-panic.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:assertion `left != right` failed
 //@ error-pattern:  left: 14
 //@ error-pattern: right: 14
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert_ne!(14, 14);
diff --git a/tests/ui/macros/die-macro-2.rs b/tests/ui/macros/die-macro-2.rs
index e5456bdfca0..d802f189ce1 100644
--- a/tests/ui/macros/die-macro-2.rs
+++ b/tests/ui/macros/die-macro-2.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:test
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("test");
diff --git a/tests/ui/macros/die-macro-expr.rs b/tests/ui/macros/die-macro-expr.rs
index fb92dd66e3d..f4fefb0ca37 100644
--- a/tests/ui/macros/die-macro-expr.rs
+++ b/tests/ui/macros/die-macro-expr.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:test
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let __isize: isize = panic!("test");
diff --git a/tests/ui/macros/die-macro-pure.rs b/tests/ui/macros/die-macro-pure.rs
index 484eed3d720..d84787705a1 100644
--- a/tests/ui/macros/die-macro-pure.rs
+++ b/tests/ui/macros/die-macro-pure.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:test
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f() {
     panic!("test");
diff --git a/tests/ui/macros/unimplemented-macro-panic.rs b/tests/ui/macros/unimplemented-macro-panic.rs
index d3bff8ca10b..804bd61270e 100644
--- a/tests/ui/macros/unimplemented-macro-panic.rs
+++ b/tests/ui/macros/unimplemented-macro-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:not implemented
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     unimplemented!()
diff --git a/tests/ui/macros/unreachable-arg.rs b/tests/ui/macros/unreachable-arg.rs
index 1f0d0073486..702bd053ab0 100644
--- a/tests/ui/macros/unreachable-arg.rs
+++ b/tests/ui/macros/unreachable-arg.rs
@@ -1,4 +1,4 @@
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 //@ revisions: edition_2015 edition_2021
 //@ [edition_2015]edition:2015
diff --git a/tests/ui/macros/unreachable-fmt-msg.rs b/tests/ui/macros/unreachable-fmt-msg.rs
index b16394a1920..928e0a427ae 100644
--- a/tests/ui/macros/unreachable-fmt-msg.rs
+++ b/tests/ui/macros/unreachable-fmt-msg.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:internal error: entered unreachable code: 6 is not prime
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     unreachable!("{} is not {}", 6u32, "prime");
diff --git a/tests/ui/macros/unreachable-format-arg.rs b/tests/ui/macros/unreachable-format-arg.rs
index 449c6bca16b..e1fdab25a43 100644
--- a/tests/ui/macros/unreachable-format-arg.rs
+++ b/tests/ui/macros/unreachable-format-arg.rs
@@ -1,5 +1,5 @@
 //@ run-fail
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 //@ revisions: edition_2015 edition_2021
 //@ [edition_2015]edition:2015
diff --git a/tests/ui/macros/unreachable-format-args.rs b/tests/ui/macros/unreachable-format-args.rs
index 5f8a0e9cdff..856fc992685 100644
--- a/tests/ui/macros/unreachable-format-args.rs
+++ b/tests/ui/macros/unreachable-format-args.rs
@@ -1,4 +1,4 @@
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 //@ revisions: edition_2015 edition_2021
 //@ [edition_2015]edition:2015
diff --git a/tests/ui/macros/unreachable-macro-panic.rs b/tests/ui/macros/unreachable-macro-panic.rs
index 7909bcb7624..c5cea5551cf 100644
--- a/tests/ui/macros/unreachable-macro-panic.rs
+++ b/tests/ui/macros/unreachable-macro-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:internal error: entered unreachable code
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     unreachable!()
diff --git a/tests/ui/macros/unreachable-static-msg.rs b/tests/ui/macros/unreachable-static-msg.rs
index 3e917897da4..a85f8962e7d 100644
--- a/tests/ui/macros/unreachable-static-msg.rs
+++ b/tests/ui/macros/unreachable-static-msg.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:internal error: entered unreachable code: uhoh
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     unreachable!("uhoh")
diff --git a/tests/ui/macros/unreachable.rs b/tests/ui/macros/unreachable.rs
index 7909bcb7624..c5cea5551cf 100644
--- a/tests/ui/macros/unreachable.rs
+++ b/tests/ui/macros/unreachable.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:internal error: entered unreachable code
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     unreachable!()
diff --git a/tests/ui/match/expr-match-panic-fn.rs b/tests/ui/match/expr-match-panic-fn.rs
index 82991d20df8..a07c2c6af8f 100644
--- a/tests/ui/match/expr-match-panic-fn.rs
+++ b/tests/ui/match/expr-match-panic-fn.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f() -> ! {
     panic!()
diff --git a/tests/ui/match/expr-match-panic.rs b/tests/ui/match/expr-match-panic.rs
index e332ba83b91..d15b0a9cd72 100644
--- a/tests/ui/match/expr-match-panic.rs
+++ b/tests/ui/match/expr-match-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let _x = match true {
diff --git a/tests/ui/match/match-bot-panic.rs b/tests/ui/match/match-bot-panic.rs
index a155b5fb3f2..7ec07ae290d 100644
--- a/tests/ui/match/match-bot-panic.rs
+++ b/tests/ui/match/match-bot-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(unreachable_code)]
 #![allow(unused_variables)]
diff --git a/tests/ui/match/match-disc-bot.rs b/tests/ui/match/match-disc-bot.rs
index fdb98a0accb..d65dc5aea07 100644
--- a/tests/ui/match/match-disc-bot.rs
+++ b/tests/ui/match/match-disc-bot.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:quux
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f() -> ! {
     panic!("quux")
diff --git a/tests/ui/match/match-wildcards.rs b/tests/ui/match/match-wildcards.rs
index 4fddee6666e..1cc81a7c415 100644
--- a/tests/ui/match/match-wildcards.rs
+++ b/tests/ui/match/match-wildcards.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:squirrelcupcake
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn cmp() -> isize {
     match (Some('a'), None::<char>) {
diff --git a/tests/ui/meta/revision-ok.rs b/tests/ui/meta/revision-ok.rs
index c1387f7d18e..430d3d0a239 100644
--- a/tests/ui/meta/revision-ok.rs
+++ b/tests/ui/meta/revision-ok.rs
@@ -5,7 +5,7 @@
 //@ revisions: foo bar
 //@[foo] error-pattern:foo
 //@[bar] error-pattern:bar
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[cfg(foo)]
 fn die() {
diff --git a/tests/ui/mir/mir_codegen_calls_converging_drops.rs b/tests/ui/mir/mir_codegen_calls_converging_drops.rs
index 5c3c8b999b2..8a6d3926de2 100644
--- a/tests/ui/mir/mir_codegen_calls_converging_drops.rs
+++ b/tests/ui/mir/mir_codegen_calls_converging_drops.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:converging_fn called
 //@ error-pattern:0 dropped
 //@ error-pattern:exit
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 struct Droppable(u8);
 impl Drop for Droppable {
diff --git a/tests/ui/mir/mir_codegen_calls_converging_drops_2.rs b/tests/ui/mir/mir_codegen_calls_converging_drops_2.rs
index e3cb9a96de0..e89fbc58a0d 100644
--- a/tests/ui/mir/mir_codegen_calls_converging_drops_2.rs
+++ b/tests/ui/mir/mir_codegen_calls_converging_drops_2.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:complex called
 //@ error-pattern:dropped
 //@ error-pattern:exit
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 struct Droppable;
 impl Drop for Droppable {
diff --git a/tests/ui/mir/mir_codegen_calls_diverging.rs b/tests/ui/mir/mir_codegen_calls_diverging.rs
index c62527f01d3..ce2d7140b07 100644
--- a/tests/ui/mir/mir_codegen_calls_diverging.rs
+++ b/tests/ui/mir/mir_codegen_calls_diverging.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:diverging_fn called
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn diverging_fn() -> ! {
     panic!("diverging_fn called")
diff --git a/tests/ui/mir/mir_dynamic_drops_1.rs b/tests/ui/mir/mir_dynamic_drops_1.rs
index ffb8cc26100..0b0a3960574 100644
--- a/tests/ui/mir/mir_dynamic_drops_1.rs
+++ b/tests/ui/mir/mir_dynamic_drops_1.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:drop 1
 //@ error-pattern:drop 2
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 /// Structure which will not allow to be dropped twice.
 struct Droppable<'a>(&'a mut bool, u32);
diff --git a/tests/ui/mir/mir_dynamic_drops_2.rs b/tests/ui/mir/mir_dynamic_drops_2.rs
index dc71f414673..f625f19be26 100644
--- a/tests/ui/mir/mir_dynamic_drops_2.rs
+++ b/tests/ui/mir/mir_dynamic_drops_2.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:drop 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 /// Structure which will not allow to be dropped twice.
 struct Droppable<'a>(&'a mut bool, u32);
diff --git a/tests/ui/mir/mir_dynamic_drops_3.rs b/tests/ui/mir/mir_dynamic_drops_3.rs
index fe84502ef1d..2a8af4ce1fb 100644
--- a/tests/ui/mir/mir_dynamic_drops_3.rs
+++ b/tests/ui/mir/mir_dynamic_drops_3.rs
@@ -4,7 +4,7 @@
 //@ error-pattern:drop 3
 //@ error-pattern:drop 2
 //@ error-pattern:drop 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 /// Structure which will not allow to be dropped twice.
 struct Droppable<'a>(&'a mut bool, u32);
diff --git a/tests/ui/mir/mir_indexing_oob_1.rs b/tests/ui/mir/mir_indexing_oob_1.rs
index 3afc2f0b32e..936484b0c1e 100644
--- a/tests/ui/mir/mir_indexing_oob_1.rs
+++ b/tests/ui/mir/mir_indexing_oob_1.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 5 but the index is 10
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 const C: [u32; 5] = [0; 5];
 
diff --git a/tests/ui/mir/mir_indexing_oob_2.rs b/tests/ui/mir/mir_indexing_oob_2.rs
index 6e7c1c83536..310a7f8f2b7 100644
--- a/tests/ui/mir/mir_indexing_oob_2.rs
+++ b/tests/ui/mir/mir_indexing_oob_2.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 5 but the index is 10
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 const C: &'static [u8; 5] = b"hello";
 
diff --git a/tests/ui/mir/mir_indexing_oob_3.rs b/tests/ui/mir/mir_indexing_oob_3.rs
index 4012864c6ce..44b3a2c5a6d 100644
--- a/tests/ui/mir/mir_indexing_oob_3.rs
+++ b/tests/ui/mir/mir_indexing_oob_3.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 5 but the index is 10
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 const C: &'static [u8; 5] = b"hello";
 
diff --git a/tests/ui/never_type/return-never-coerce.rs b/tests/ui/never_type/return-never-coerce.rs
index 559b7d0e985..14f07dfeb76 100644
--- a/tests/ui/never_type/return-never-coerce.rs
+++ b/tests/ui/never_type/return-never-coerce.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:aah!
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn call_another_fn<T, F: FnOnce() -> T>(f: F) -> T {
     f()
diff --git a/tests/ui/nll/issue-51345-2.rs b/tests/ui/nll/issue-51345-2.rs
index f2501fdbab4..39871d56a9a 100644
--- a/tests/ui/nll/issue-51345-2.rs
+++ b/tests/ui/nll/issue-51345-2.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let mut vec = vec![];
diff --git a/tests/ui/numbers-arithmetic/divide-by-zero.rs b/tests/ui/numbers-arithmetic/divide-by-zero.rs
index 626daf9771d..a05abadf4bb 100644
--- a/tests/ui/numbers-arithmetic/divide-by-zero.rs
+++ b/tests/ui/numbers-arithmetic/divide-by-zero.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:attempt to divide by zero
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[allow(unconditional_panic)]
 fn main() {
diff --git a/tests/ui/numbers-arithmetic/mod-zero.rs b/tests/ui/numbers-arithmetic/mod-zero.rs
index f3cc7c9fc88..300bd765c40 100644
--- a/tests/ui/numbers-arithmetic/mod-zero.rs
+++ b/tests/ui/numbers-arithmetic/mod-zero.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:attempt to calculate the remainder with a divisor of zero
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #[allow(unconditional_panic)]
 fn main() {
diff --git a/tests/ui/numbers-arithmetic/overflowing-add.rs b/tests/ui/numbers-arithmetic/overflowing-add.rs
index 16583f6eb74..c1f498c802b 100644
--- a/tests/ui/numbers-arithmetic/overflowing-add.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-add.rs
@@ -2,7 +2,7 @@
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:attempt to add with overflow
 //@ compile-flags: -C debug-assertions
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(arithmetic_overflow)]
 
diff --git a/tests/ui/numbers-arithmetic/overflowing-mul.rs b/tests/ui/numbers-arithmetic/overflowing-mul.rs
index 59575d2e86e..0eece536929 100644
--- a/tests/ui/numbers-arithmetic/overflowing-mul.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-mul.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:attempt to multiply with overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 //@ compile-flags: -C debug-assertions
 
 #![allow(arithmetic_overflow)]
diff --git a/tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs b/tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs
index 8aa0d04e500..c5059c002b4 100644
--- a/tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-neg-nonzero.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:attempt to negate with overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 //@ compile-flags: -C debug-assertions
 #![allow(arithmetic_overflow)]
 
diff --git a/tests/ui/numbers-arithmetic/overflowing-pow-signed.rs b/tests/ui/numbers-arithmetic/overflowing-pow-signed.rs
index 69e22c2262a..28deb7cf6ba 100644
--- a/tests/ui/numbers-arithmetic/overflowing-pow-signed.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-pow-signed.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:attempt to multiply with overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 //@ compile-flags: -C debug-assertions
 
 fn main() {
diff --git a/tests/ui/numbers-arithmetic/overflowing-pow-unsigned.rs b/tests/ui/numbers-arithmetic/overflowing-pow-unsigned.rs
index f980033c480..dea9a4d5428 100644
--- a/tests/ui/numbers-arithmetic/overflowing-pow-unsigned.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-pow-unsigned.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:attempt to multiply with overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 //@ compile-flags: -C debug-assertions
 
 fn main() {
diff --git a/tests/ui/numbers-arithmetic/overflowing-sub.rs b/tests/ui/numbers-arithmetic/overflowing-sub.rs
index 44aadf6b3e7..88b1b693f63 100644
--- a/tests/ui/numbers-arithmetic/overflowing-sub.rs
+++ b/tests/ui/numbers-arithmetic/overflowing-sub.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:attempt to subtract with overflow
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 //@ compile-flags: -C debug-assertions
 
 #![allow(arithmetic_overflow)]
diff --git a/tests/ui/panic-runtime/unwind-interleaved.rs b/tests/ui/panic-runtime/unwind-interleaved.rs
index e5505cd893a..83eb6365097 100644
--- a/tests/ui/panic-runtime/unwind-interleaved.rs
+++ b/tests/ui/panic-runtime/unwind-interleaved.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn a() {}
 
diff --git a/tests/ui/panic-runtime/unwind-rec.rs b/tests/ui/panic-runtime/unwind-rec.rs
index d4b53c88768..a855a4de280 100644
--- a/tests/ui/panic-runtime/unwind-rec.rs
+++ b/tests/ui/panic-runtime/unwind-rec.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn build() -> Vec<isize> {
     panic!();
diff --git a/tests/ui/panic-runtime/unwind-rec2.rs b/tests/ui/panic-runtime/unwind-rec2.rs
index 6ac9a5a5805..ed02b117fff 100644
--- a/tests/ui/panic-runtime/unwind-rec2.rs
+++ b/tests/ui/panic-runtime/unwind-rec2.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn build1() -> Vec<isize> {
     vec![0, 0, 0, 0, 0, 0, 0]
diff --git a/tests/ui/panic-runtime/unwind-unique.rs b/tests/ui/panic-runtime/unwind-unique.rs
index a6cd59690ca..b57d81842c4 100644
--- a/tests/ui/panic-runtime/unwind-unique.rs
+++ b/tests/ui/panic-runtime/unwind-unique.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn failfn() {
     panic!();
diff --git a/tests/ui/panics/abort-on-panic.rs b/tests/ui/panics/abort-on-panic.rs
index feccefb2537..d3bf087bd3e 100644
--- a/tests/ui/panics/abort-on-panic.rs
+++ b/tests/ui/panics/abort-on-panic.rs
@@ -8,8 +8,7 @@
 // Since we mark some ABIs as "nounwind" to LLVM, we must make sure that
 // we never unwind through them.
 
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::io;
 use std::io::prelude::*;
diff --git a/tests/ui/panics/args-panic.rs b/tests/ui/panics/args-panic.rs
index 091ced9b479..9675c99dcb6 100644
--- a/tests/ui/panics/args-panic.rs
+++ b/tests/ui/panics/args-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:meep
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f(_a: isize, _b: isize, _c: Box<isize>) {
     panic!("moop");
diff --git a/tests/ui/panics/doublepanic.rs b/tests/ui/panics/doublepanic.rs
index 51945ea708c..6fddde82a27 100644
--- a/tests/ui/panics/doublepanic.rs
+++ b/tests/ui/panics/doublepanic.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:One
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("One");
diff --git a/tests/ui/panics/explicit-panic-msg.rs b/tests/ui/panics/explicit-panic-msg.rs
index ef0c5b39f09..e5728ef1e20 100644
--- a/tests/ui/panics/explicit-panic-msg.rs
+++ b/tests/ui/panics/explicit-panic-msg.rs
@@ -4,7 +4,7 @@
 
 //@ run-fail
 //@ error-pattern:wooooo
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let mut a = 1;
diff --git a/tests/ui/panics/explicit-panic.rs b/tests/ui/panics/explicit-panic.rs
index 34e952ef68f..7c69289940e 100644
--- a/tests/ui/panics/explicit-panic.rs
+++ b/tests/ui/panics/explicit-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:explicit
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!();
diff --git a/tests/ui/panics/fmt-panic.rs b/tests/ui/panics/fmt-panic.rs
index 032f65cb2e4..c6cb039684d 100644
--- a/tests/ui/panics/fmt-panic.rs
+++ b/tests/ui/panics/fmt-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:meh
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let str_var: String = "meh".to_string();
diff --git a/tests/ui/panics/issue-47429-short-backtraces.rs b/tests/ui/panics/issue-47429-short-backtraces.rs
index dff885af1b8..4a73ebe8712 100644
--- a/tests/ui/panics/issue-47429-short-backtraces.rs
+++ b/tests/ui/panics/issue-47429-short-backtraces.rs
@@ -17,10 +17,10 @@
 //@ ignore-msvc see #62897 and `backtrace-debuginfo.rs` test
 //@ ignore-android FIXME #17520
 //@ ignore-openbsd no support for libbacktrace without filename
-//@ ignore-wasm no panic or subprocess support
-//@ ignore-emscripten no panic or subprocess support
-//@ ignore-sgx no subprocess support
+//@ ignore-wasm no panic support
+//@ ignore-emscripten no panic support
 //@ ignore-fuchsia Backtraces not symbolized
+//@ needs-subprocess
 
 fn main() {
     panic!()
diff --git a/tests/ui/panics/main-panic.rs b/tests/ui/panics/main-panic.rs
index b69f1656ca4..0b3d5c3aaec 100644
--- a/tests/ui/panics/main-panic.rs
+++ b/tests/ui/panics/main-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked at
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!()
diff --git a/tests/ui/panics/panic-arg.rs b/tests/ui/panics/panic-arg.rs
index 10be6d5ff6c..037cfda3689 100644
--- a/tests/ui/panics/panic-arg.rs
+++ b/tests/ui/panics/panic-arg.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:woe
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn f(a: isize) {
     println!("{}", a);
diff --git a/tests/ui/panics/panic-macro-any-wrapped.rs b/tests/ui/panics/panic-macro-any-wrapped.rs
index 7c6790e35fd..e3a2dc6eed4 100644
--- a/tests/ui/panics/panic-macro-any-wrapped.rs
+++ b/tests/ui/panics/panic-macro-any-wrapped.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:Box<dyn Any>
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(non_fmt_panics)]
 
diff --git a/tests/ui/panics/panic-macro-any.rs b/tests/ui/panics/panic-macro-any.rs
index 75397333fa4..1392929b65c 100644
--- a/tests/ui/panics/panic-macro-any.rs
+++ b/tests/ui/panics/panic-macro-any.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:Box<dyn Any>
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(non_fmt_panics)]
 
diff --git a/tests/ui/panics/panic-macro-explicit.rs b/tests/ui/panics/panic-macro-explicit.rs
index 2c7b84d99fe..b9195e3b0fc 100644
--- a/tests/ui/panics/panic-macro-explicit.rs
+++ b/tests/ui/panics/panic-macro-explicit.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:explicit panic
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!();
diff --git a/tests/ui/panics/panic-macro-fmt.rs b/tests/ui/panics/panic-macro-fmt.rs
index 1a63a06c75a..550cd5c1ee3 100644
--- a/tests/ui/panics/panic-macro-fmt.rs
+++ b/tests/ui/panics/panic-macro-fmt.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:test-fail-fmt 42 rust
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("test-fail-fmt {} {}", 42, "rust");
diff --git a/tests/ui/panics/panic-macro-owned.rs b/tests/ui/panics/panic-macro-owned.rs
index 1878f3d52ab..4df04c50bc3 100644
--- a/tests/ui/panics/panic-macro-owned.rs
+++ b/tests/ui/panics/panic-macro-owned.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:test-fail-owned
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("test-fail-owned");
diff --git a/tests/ui/panics/panic-macro-static.rs b/tests/ui/panics/panic-macro-static.rs
index 018166e60cf..1c6258ebed2 100644
--- a/tests/ui/panics/panic-macro-static.rs
+++ b/tests/ui/panics/panic-macro-static.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:panicked
 //@ error-pattern:test-fail-static
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("test-fail-static");
diff --git a/tests/ui/panics/panic-main.rs b/tests/ui/panics/panic-main.rs
index d71fca0754e..3876dbb37c3 100644
--- a/tests/ui/panics/panic-main.rs
+++ b/tests/ui/panics/panic-main.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:moop
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("moop");
diff --git a/tests/ui/panics/panic-parens.rs b/tests/ui/panics/panic-parens.rs
index 271d0363cab..5440bf18f25 100644
--- a/tests/ui/panics/panic-parens.rs
+++ b/tests/ui/panics/panic-parens.rs
@@ -3,7 +3,7 @@
 
 //@ run-fail
 //@ error-pattern:oops
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn bigpanic() {
     while (panic!("oops")) {
diff --git a/tests/ui/panics/panic-set-handler.rs b/tests/ui/panics/panic-set-handler.rs
index 39286ca865b..41e513e0bd6 100644
--- a/tests/ui/panics/panic-set-handler.rs
+++ b/tests/ui/panics/panic-set-handler.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:greetings from the panic handler
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::panic;
 
diff --git a/tests/ui/panics/panic-set-unset-handler.rs b/tests/ui/panics/panic-set-unset-handler.rs
index 02f1599338b..66d5003d0f1 100644
--- a/tests/ui/panics/panic-set-unset-handler.rs
+++ b/tests/ui/panics/panic-set-unset-handler.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:foobar
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::panic;
 
diff --git a/tests/ui/panics/panic-take-handler-nop.rs b/tests/ui/panics/panic-take-handler-nop.rs
index 89e1d234df1..f10582872df 100644
--- a/tests/ui/panics/panic-take-handler-nop.rs
+++ b/tests/ui/panics/panic-take-handler-nop.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:thread 'main' panicked
 //@ error-pattern:foobar
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::panic;
 
diff --git a/tests/ui/panics/panic.rs b/tests/ui/panics/panic.rs
index b9721ac8230..068f187524d 100644
--- a/tests/ui/panics/panic.rs
+++ b/tests/ui/panics/panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:1 == 2
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     assert!(1 == 2);
diff --git a/tests/ui/panics/result-get-panic.rs b/tests/ui/panics/result-get-panic.rs
index d7f6dfe8406..b8dc49f9aca 100644
--- a/tests/ui/panics/result-get-panic.rs
+++ b/tests/ui/panics/result-get-panic.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:called `Result::unwrap()` on an `Err` value
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::result::Result::Err;
 
diff --git a/tests/ui/panics/runtime-switch.rs b/tests/ui/panics/runtime-switch.rs
index ffd038f9535..9f0be8c7ddf 100644
--- a/tests/ui/panics/runtime-switch.rs
+++ b/tests/ui/panics/runtime-switch.rs
@@ -18,9 +18,9 @@
 //@ ignore-android FIXME #17520
 //@ ignore-openbsd no support for libbacktrace without filename
 //@ ignore-wasm no backtrace support
-//@ ignore-emscripten no panic or subprocess support
-//@ ignore-sgx no subprocess support
+//@ ignore-emscripten no panic support
 //@ ignore-fuchsia Backtrace not symbolized
+//@ needs-subprocess
 
 #![feature(panic_backtrace_config)]
 
diff --git a/tests/ui/panics/test-panic.rs b/tests/ui/panics/test-panic.rs
index 29a3c4e9c9f..c7af47524cf 100644
--- a/tests/ui/panics/test-panic.rs
+++ b/tests/ui/panics/test-panic.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ check-stdout
 //@ compile-flags: --test
-//@ ignore-emscripten
+//@ needs-subprocess
 
 #[test]
 fn test_foo() {
diff --git a/tests/ui/panics/test-should-panic-no-message.rs b/tests/ui/panics/test-should-panic-no-message.rs
index b6ed6b19dd0..05fc927d876 100644
--- a/tests/ui/panics/test-should-panic-no-message.rs
+++ b/tests/ui/panics/test-should-panic-no-message.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ compile-flags: --test
 //@ check-stdout
-//@ ignore-wasm32 no processes
+//@ needs-subprocess
 
 #[test]
 #[should_panic(expected = "foo")]
diff --git a/tests/ui/panics/while-body-panics.rs b/tests/ui/panics/while-body-panics.rs
index bddcd5d50ce..8459a8d63bf 100644
--- a/tests/ui/panics/while-body-panics.rs
+++ b/tests/ui/panics/while-body-panics.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:quux
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let _x: isize = {
diff --git a/tests/ui/panics/while-panic.rs b/tests/ui/panics/while-panic.rs
index 2961e8599c3..4c8431c71d1 100644
--- a/tests/ui/panics/while-panic.rs
+++ b/tests/ui/panics/while-panic.rs
@@ -2,7 +2,7 @@
 
 //@ run-fail
 //@ error-pattern:giraffe
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     panic!("{}", {
diff --git a/tests/ui/print-stdout-eprint-stderr.rs b/tests/ui/print-stdout-eprint-stderr.rs
index e84a9bebc49..4b356e2fe61 100644
--- a/tests/ui/print-stdout-eprint-stderr.rs
+++ b/tests/ui/print-stdout-eprint-stderr.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 spawning processes is not supported
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::{env, process};
 
diff --git a/tests/ui/process/env-args-reverse-iterator.rs b/tests/ui/process/env-args-reverse-iterator.rs
index 830e9535466..f0afeeb22eb 100644
--- a/tests/ui/process/env-args-reverse-iterator.rs
+++ b/tests/ui/process/env-args-reverse-iterator.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env::args;
 use std::process::Command;
diff --git a/tests/ui/process/inherit-env.rs b/tests/ui/process/inherit-env.rs
index 0eb61fcdd53..09d5b76141e 100644
--- a/tests/ui/process/inherit-env.rs
+++ b/tests/ui/process/inherit-env.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no subprocess support
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env;
 use std::process::Command;
diff --git a/tests/ui/process/issue-14940.rs b/tests/ui/process/issue-14940.rs
index 13fb18154a0..cfbc743250f 100644
--- a/tests/ui/process/issue-14940.rs
+++ b/tests/ui/process/issue-14940.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env;
 use std::process::Command;
diff --git a/tests/ui/process/issue-16272.rs b/tests/ui/process/issue-16272.rs
index bf26769d494..72708554753 100644
--- a/tests/ui/process/issue-16272.rs
+++ b/tests/ui/process/issue-16272.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::process::Command;
 use std::env;
diff --git a/tests/ui/process/issue-30490.rs b/tests/ui/process/issue-30490.rs
index 0d918bc3dd5..75b36e7c20b 100644
--- a/tests/ui/process/issue-30490.rs
+++ b/tests/ui/process/issue-30490.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-emscripten no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia Child I/O swaps not privileged
 
 // Previously libstd would set stdio descriptors of a child process
diff --git a/tests/ui/process/multi-panic.rs b/tests/ui/process/multi-panic.rs
index ad47925a149..481fe75c731 100644
--- a/tests/ui/process/multi-panic.rs
+++ b/tests/ui/process/multi-panic.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ needs-unwind
 
 fn check_for_no_backtrace(test: std::process::Output) {
diff --git a/tests/ui/process/no-stdio.rs b/tests/ui/process/no-stdio.rs
index 8eebf6dbc7d..5cc7cacbb22 100644
--- a/tests/ui/process/no-stdio.rs
+++ b/tests/ui/process/no-stdio.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 //@ ignore-android
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 #![feature(rustc_private)]
 
diff --git a/tests/ui/process/println-with-broken-pipe.rs b/tests/ui/process/println-with-broken-pipe.rs
index d88c6dcc12b..fbac9b6cd95 100644
--- a/tests/ui/process/println-with-broken-pipe.rs
+++ b/tests/ui/process/println-with-broken-pipe.rs
@@ -1,7 +1,7 @@
 //@ run-pass
 //@ check-run-results
+//@ needs-subprocess
 //@ ignore-windows
-//@ ignore-wasm32
 //@ ignore-fuchsia
 //@ ignore-horizon
 //@ ignore-android
diff --git a/tests/ui/process/process-envs.rs b/tests/ui/process/process-envs.rs
index 15285960d16..98052f1d3a5 100644
--- a/tests/ui/process/process-envs.rs
+++ b/tests/ui/process/process-envs.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-vxworks no 'env'
 //@ ignore-fuchsia no 'env'
 
diff --git a/tests/ui/process/process-remove-from-env.rs b/tests/ui/process/process-remove-from-env.rs
index 21fff4fd45d..c1a2b2daf5b 100644
--- a/tests/ui/process/process-remove-from-env.rs
+++ b/tests/ui/process/process-remove-from-env.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-vxworks no 'env'
 //@ ignore-fuchsia no 'env'
 
diff --git a/tests/ui/process/process-spawn-nonexistent.rs b/tests/ui/process/process-spawn-nonexistent.rs
index 1cd32866299..3db670624fb 100644
--- a/tests/ui/process/process-spawn-nonexistent.rs
+++ b/tests/ui/process/process-spawn-nonexistent.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia ErrorKind not translated
 
 use std::io::ErrorKind;
diff --git a/tests/ui/process/process-spawn-with-unicode-params.rs b/tests/ui/process/process-spawn-with-unicode-params.rs
index 4d2ba49eeac..65f835c1345 100644
--- a/tests/ui/process/process-spawn-with-unicode-params.rs
+++ b/tests/ui/process/process-spawn-with-unicode-params.rs
@@ -7,8 +7,7 @@
 // non-ASCII characters.  The child process ensures all the strings are
 // intact.
 
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia Filesystem manipulation privileged
 
 use std::io::prelude::*;
diff --git a/tests/ui/process/process-status-inherits-stdin.rs b/tests/ui/process/process-status-inherits-stdin.rs
index 39eef34c5f8..d5dd0e55fa3 100644
--- a/tests/ui/process/process-status-inherits-stdin.rs
+++ b/tests/ui/process/process-status-inherits-stdin.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env;
 use std::io;
diff --git a/tests/ui/process/tls-exit-status.rs b/tests/ui/process/tls-exit-status.rs
index cddcf369da0..6dd0d71ef35 100644
--- a/tests/ui/process/tls-exit-status.rs
+++ b/tests/ui/process/tls-exit-status.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:nonzero
 //@ exec-env:RUST_NEWRT=1
-//@ ignore-wasm32 no processes
+//@ needs-subprocess
 
 use std::env;
 
diff --git a/tests/ui/reachable/issue-948.rs b/tests/ui/reachable/issue-948.rs
index 8e239a1115e..6181e547acc 100644
--- a/tests/ui/reachable/issue-948.rs
+++ b/tests/ui/reachable/issue-948.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:beep boop
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(unused_variables)]
 
diff --git a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-box-dyn-error-err.rs b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-box-dyn-error-err.rs
index fb6718e55b2..00a0ea04c0d 100644
--- a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-box-dyn-error-err.rs
+++ b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-box-dyn-error-err.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:returned Box<dyn Error> from main()
 //@ failure-status: 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::error::Error;
 use std::io;
diff --git a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-never.rs b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-never.rs
index 91be3afbe22..3b80c2b49a5 100644
--- a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-never.rs
+++ b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-never.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:oh, dear
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() -> ! {
     panic!("oh, dear");
diff --git a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-result-box-error_err.rs b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-result-box-error_err.rs
index f1d972b3c55..48605309965 100644
--- a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-result-box-error_err.rs
+++ b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-result-box-error_err.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern:returned Box<Error> from main()
 //@ failure-status: 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 use std::io::{Error, ErrorKind};
 
diff --git a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-str-err.rs b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-str-err.rs
index acf3da2d55f..8f7b3da31bb 100644
--- a/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-str-err.rs
+++ b/tests/ui/rfcs/rfc-1937-termination-trait/termination-trait-for-str-err.rs
@@ -1,7 +1,7 @@
 //@ run-fail
 //@ error-pattern: An error message for you
 //@ failure-status: 1
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() -> Result<(), &'static str> {
     Err("An error message for you")
diff --git a/tests/ui/runtime/atomic-print.rs b/tests/ui/runtime/atomic-print.rs
index 73520589736..6b899d675a2 100644
--- a/tests/ui/runtime/atomic-print.rs
+++ b/tests/ui/runtime/atomic-print.rs
@@ -2,8 +2,8 @@
 
 #![allow(unused_must_use)]
 #![allow(deprecated)]
-//@ ignore-wasm32 no processes or threads
-//@ ignore-sgx no processes
+//@ needs-threads
+//@ needs-subprocess
 
 use std::{env, fmt, process, sync, thread};
 
diff --git a/tests/ui/runtime/backtrace-debuginfo.rs b/tests/ui/runtime/backtrace-debuginfo.rs
index da747ded44f..afc96d6bb5f 100644
--- a/tests/ui/runtime/backtrace-debuginfo.rs
+++ b/tests/ui/runtime/backtrace-debuginfo.rs
@@ -9,8 +9,7 @@
 //@ compile-flags:-g -Copt-level=0 -Cllvm-args=-enable-tail-merge=0
 //@ compile-flags:-Cforce-frame-pointers=yes
 //@ compile-flags:-Cstrip=none
-//@ ignore-wasm32 spawning processes is not supported
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia Backtrace not symbolized, trace different line alignment
 
 // FIXME(#117097): backtrace (possibly unwinding mechanism) seems to be different on at least
diff --git a/tests/ui/runtime/out-of-stack.rs b/tests/ui/runtime/out-of-stack.rs
index c5300635ad9..6be34afb560 100644
--- a/tests/ui/runtime/out-of-stack.rs
+++ b/tests/ui/runtime/out-of-stack.rs
@@ -3,8 +3,7 @@
 #![allow(unused_must_use)]
 #![allow(unconditional_recursion)]
 //@ ignore-android: FIXME (#20004)
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia must translate zircon signal to SIGABRT, FIXME (#58590)
 //@ ignore-nto no stack overflow handler used (no alternate stack available)
 //@ ignore-ios stack overflow handlers aren't enabled
diff --git a/tests/ui/runtime/rt-explody-panic-payloads.rs b/tests/ui/runtime/rt-explody-panic-payloads.rs
index bd3624a8aee..c177fd260ed 100644
--- a/tests/ui/runtime/rt-explody-panic-payloads.rs
+++ b/tests/ui/runtime/rt-explody-panic-payloads.rs
@@ -1,7 +1,6 @@
 //@ run-pass
 //@ needs-unwind
-//@ ignore-emscripten no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env;
 use std::process::Command;
diff --git a/tests/ui/runtime/running-with-no-runtime.rs b/tests/ui/runtime/running-with-no-runtime.rs
index 5c219b6feda..7ac0dd912dc 100644
--- a/tests/ui/runtime/running-with-no-runtime.rs
+++ b/tests/ui/runtime/running-with-no-runtime.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 spawning processes is not supported
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 #![no_main]
 
diff --git a/tests/ui/simd/target-feature-mixup.rs b/tests/ui/simd/target-feature-mixup.rs
index 62d87c3a6dc..2786251c795 100644
--- a/tests/ui/simd/target-feature-mixup.rs
+++ b/tests/ui/simd/target-feature-mixup.rs
@@ -3,8 +3,7 @@
 #![allow(stable_features)]
 #![allow(overflowing_literals)]
 
-//@ ignore-wasm32 no subprocess support
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-fuchsia must translate zircon signal to SIGILL, FIXME (#58590)
 
 #![feature(repr_simd, target_feature, cfg_target_feature)]
diff --git a/tests/ui/stdio-is-blocking.rs b/tests/ui/stdio-is-blocking.rs
index dda100951dd..615530dcd47 100644
--- a/tests/ui/stdio-is-blocking.rs
+++ b/tests/ui/stdio-is-blocking.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::env;
 use std::io::prelude::*;
diff --git a/tests/ui/str/str-overrun.rs b/tests/ui/str/str-overrun.rs
index b8e245475da..6d62b837694 100644
--- a/tests/ui/str/str-overrun.rs
+++ b/tests/ui/str/str-overrun.rs
@@ -1,6 +1,6 @@
 //@ run-fail
 //@ error-pattern:index out of bounds: the len is 5 but the index is 5
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 fn main() {
     let s: String = "hello".to_string();
diff --git a/tests/ui/structs/rhs-type.rs b/tests/ui/structs/rhs-type.rs
index fde5c16a068..8ce924672cf 100644
--- a/tests/ui/structs/rhs-type.rs
+++ b/tests/ui/structs/rhs-type.rs
@@ -3,7 +3,7 @@
 
 //@ run-fail
 //@ error-pattern:bye
-//@ ignore-emscripten no processes
+//@ needs-subprocess
 
 #![allow(unreachable_code)]
 #![allow(unused_variables)]
diff --git a/tests/ui/test-attrs/test-panic-abort-disabled.rs b/tests/ui/test-attrs/test-panic-abort-disabled.rs
index fbe3d7d5d18..05dd9395c2b 100644
--- a/tests/ui/test-attrs/test-panic-abort-disabled.rs
+++ b/tests/ui/test-attrs/test-panic-abort-disabled.rs
@@ -4,8 +4,9 @@
 //@ run-flags: --test-threads=1
 
 //@ needs-unwind
-//@ ignore-wasm no panic or subprocess support
-//@ ignore-emscripten no panic or subprocess support
+//@ ignore-wasm no panic support
+//@ ignore-emscripten no panic support
+//@ needs-subprocess
 
 #![cfg(test)]
 
diff --git a/tests/ui/test-attrs/test-panic-abort-nocapture.rs b/tests/ui/test-attrs/test-panic-abort-nocapture.rs
index 4377ae1ac3b..f7e15dbdbc3 100644
--- a/tests/ui/test-attrs/test-panic-abort-nocapture.rs
+++ b/tests/ui/test-attrs/test-panic-abort-nocapture.rs
@@ -7,9 +7,9 @@
 //@ normalize-stdout: "finished in \d+\.\d+s" -> "finished in $$TIME"
 
 //@ ignore-android #120567
-//@ ignore-wasm no panic or subprocess support
-//@ ignore-emscripten no panic or subprocess support
-//@ ignore-sgx no subprocess support
+//@ ignore-wasm no panic support
+//@ ignore-emscripten no panic support
+//@ needs-subprocess
 
 #![cfg(test)]
 
diff --git a/tests/ui/test-attrs/test-panic-abort.rs b/tests/ui/test-attrs/test-panic-abort.rs
index 3d203e059a4..951cf54346b 100644
--- a/tests/ui/test-attrs/test-panic-abort.rs
+++ b/tests/ui/test-attrs/test-panic-abort.rs
@@ -7,9 +7,9 @@
 //@ normalize-stdout: "finished in \d+\.\d+s" -> "finished in $$TIME"
 
 //@ ignore-android #120567
-//@ ignore-wasm no panic or subprocess support
-//@ ignore-emscripten no panic or subprocess support
-//@ ignore-sgx no subprocess support
+//@ ignore-wasm no panic support
+//@ ignore-emscripten no panic support
+//@ needs-subprocess
 
 #![cfg(test)]
 #![feature(test)]
diff --git a/tests/ui/threads-sendsync/eprint-on-tls-drop.rs b/tests/ui/threads-sendsync/eprint-on-tls-drop.rs
index 82abf21df3f..e85c7c83339 100644
--- a/tests/ui/threads-sendsync/eprint-on-tls-drop.rs
+++ b/tests/ui/threads-sendsync/eprint-on-tls-drop.rs
@@ -1,6 +1,6 @@
 //@ run-pass
 //@ needs-threads
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::cell::RefCell;
 use std::env;
diff --git a/tests/ui/threads-sendsync/issue-24313.rs b/tests/ui/threads-sendsync/issue-24313.rs
index 99c6c4a5e12..83ab5122e82 100644
--- a/tests/ui/threads-sendsync/issue-24313.rs
+++ b/tests/ui/threads-sendsync/issue-24313.rs
@@ -1,6 +1,6 @@
 //@ run-pass
 //@ needs-threads
-//@ ignore-sgx no processes
+//@ needs-subprocess
 
 use std::process::Command;
 use std::{env, thread};
diff --git a/tests/ui/wait-forked-but-failed-child.rs b/tests/ui/wait-forked-but-failed-child.rs
index dd6a7fa0e65..04f1c1a65d5 100644
--- a/tests/ui/wait-forked-but-failed-child.rs
+++ b/tests/ui/wait-forked-but-failed-child.rs
@@ -1,6 +1,5 @@
 //@ run-pass
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ needs-subprocess
 //@ ignore-vxworks no 'ps'
 //@ ignore-fuchsia no 'ps'
 //@ ignore-nto no 'ps'