diff --git a/src/test/ui/array-slice-vec/box-of-array-of-drop-1.rs b/src/test/ui/array-slice-vec/box-of-array-of-drop-1.rs
index c8559d2472824..2b3ece67b34a0 100644
--- a/src/test/ui/array-slice-vec/box-of-array-of-drop-1.rs
+++ b/src/test/ui/array-slice-vec/box-of-array-of-drop-1.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(overflowing_literals)]
 
 // Test that we cleanup a fixed size Box<[D; k]> properly when D has a
diff --git a/src/test/ui/array-slice-vec/box-of-array-of-drop-2.rs b/src/test/ui/array-slice-vec/box-of-array-of-drop-2.rs
index e75051caabcc3..c0ca458750776 100644
--- a/src/test/ui/array-slice-vec/box-of-array-of-drop-2.rs
+++ b/src/test/ui/array-slice-vec/box-of-array-of-drop-2.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(overflowing_literals)]
 
 // Test that we cleanup dynamic sized Box<[D]> properly when D has a
diff --git a/src/test/ui/array-slice-vec/nested-vec-3.rs b/src/test/ui/array-slice-vec/nested-vec-3.rs
index 96497a53d308e..b3ae683a8a61a 100644
--- a/src/test/ui/array-slice-vec/nested-vec-3.rs
+++ b/src/test/ui/array-slice-vec/nested-vec-3.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(overflowing_literals)]
 
 // ignore-emscripten no threads support
diff --git a/src/test/ui/array-slice-vec/slice-panic-1.rs b/src/test/ui/array-slice-vec/slice-panic-1.rs
index 4134c62377835..3829078aba592 100644
--- a/src/test/ui/array-slice-vec/slice-panic-1.rs
+++ b/src/test/ui/array-slice-vec/slice-panic-1.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 // ignore-emscripten no threads support
 
diff --git a/src/test/ui/array-slice-vec/slice-panic-2.rs b/src/test/ui/array-slice-vec/slice-panic-2.rs
index 2f7178fb3e132..d83c611d3bb55 100644
--- a/src/test/ui/array-slice-vec/slice-panic-2.rs
+++ b/src/test/ui/array-slice-vec/slice-panic-2.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 // ignore-emscripten no threads support
 
diff --git a/src/test/ui/async-await/issues/issue-65419/issue-65419-async-fn-resume-after-panic.rs b/src/test/ui/async-await/issues/issue-65419/issue-65419-async-fn-resume-after-panic.rs
index f8caebcb8764e..5e71229beb5f9 100644
--- a/src/test/ui/async-await/issues/issue-65419/issue-65419-async-fn-resume-after-panic.rs
+++ b/src/test/ui/async-await/issues/issue-65419/issue-65419-async-fn-resume-after-panic.rs
@@ -2,6 +2,7 @@
 // be talking about `async fn`s instead. Should also test what happens when it panics.
 
 // run-fail
+// needs-unwind
 // error-pattern: thread 'main' panicked at '`async fn` resumed after panicking'
 // edition:2018
 // ignore-wasm no panic or subprocess support
diff --git a/src/test/ui/binding/fn-arg-incomplete-pattern-drop-order.rs b/src/test/ui/binding/fn-arg-incomplete-pattern-drop-order.rs
index ea4a9e5afa501..684172ca61cca 100644
--- a/src/test/ui/binding/fn-arg-incomplete-pattern-drop-order.rs
+++ b/src/test/ui/binding/fn-arg-incomplete-pattern-drop-order.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // Check that partially moved from function parameters are dropped after the
 // named bindings that move from them.
 
diff --git a/src/test/ui/builtin-clone-unwind.rs b/src/test/ui/builtin-clone-unwind.rs
index 2caedb649a35a..3623c4a4dd05d 100644
--- a/src/test/ui/builtin-clone-unwind.rs
+++ b/src/test/ui/builtin-clone-unwind.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 #![allow(unused_variables)]
 #![allow(unused_imports)]
diff --git a/src/test/ui/catch-unwind-bang.rs b/src/test/ui/catch-unwind-bang.rs
index f181991713b2c..b31b5cab5b724 100644
--- a/src/test/ui/catch-unwind-bang.rs
+++ b/src/test/ui/catch-unwind-bang.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 fn worker() -> ! {
diff --git a/src/test/ui/cleanup-rvalue-temp-during-incomplete-alloc.rs b/src/test/ui/cleanup-rvalue-temp-during-incomplete-alloc.rs
index eadbe44a8e9de..6cd3781b76055 100644
--- a/src/test/ui/cleanup-rvalue-temp-during-incomplete-alloc.rs
+++ b/src/test/ui/cleanup-rvalue-temp-during-incomplete-alloc.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 #![allow(unused_must_use)]
 #![allow(dead_code)]
diff --git a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.fixed b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.fixed
index 7df0dd76b4456..89f3931418dac 100644
--- a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.fixed
+++ b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.fixed
@@ -1,4 +1,5 @@
 // run-rustfix
+// needs-unwind
 
 #![deny(rust_2021_incompatible_closure_captures)]
 //~^ NOTE: the lint level is defined here
diff --git a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.rs b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.rs
index d02fac7c66952..6b0b10521740e 100644
--- a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.rs
+++ b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.rs
@@ -1,4 +1,5 @@
 // run-rustfix
+// needs-unwind
 
 #![deny(rust_2021_incompatible_closure_captures)]
 //~^ NOTE: the lint level is defined here
diff --git a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.stderr b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.stderr
index 74f85b6ebaac5..6594ec316532a 100644
--- a/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.stderr
+++ b/src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.stderr
@@ -1,5 +1,5 @@
 error: changes to closure capture in Rust 2021 will affect which traits the closure implements
-  --> $DIR/mir_calls_to_shims.rs:20:38
+  --> $DIR/mir_calls_to_shims.rs:21:38
    |
 LL |     let result = panic::catch_unwind(move || {
    |                                      ^^^^^^^
@@ -11,7 +11,7 @@ LL |         f.0()
    |         --- in Rust 2018, this closure captures all of `f`, but in Rust 2021, it will only capture `f.0`
    |
 note: the lint level is defined here
-  --> $DIR/mir_calls_to_shims.rs:3:9
+  --> $DIR/mir_calls_to_shims.rs:4:9
    |
 LL | #![deny(rust_2021_incompatible_closure_captures)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/src/test/ui/drop/drop-trait-enum.rs b/src/test/ui/drop/drop-trait-enum.rs
index 4ab8f733ad75a..d2b77650a9d5c 100644
--- a/src/test/ui/drop/drop-trait-enum.rs
+++ b/src/test/ui/drop/drop-trait-enum.rs
@@ -3,6 +3,7 @@
 #![allow(unused_assignments)]
 #![allow(unused_variables)]
 // ignore-emscripten no threads support
+// needs-unwind
 
 use std::thread;
 use std::sync::mpsc::{channel, Sender};
diff --git a/src/test/ui/drop/dynamic-drop-async.rs b/src/test/ui/drop/dynamic-drop-async.rs
index c0bf0bdf731e6..13bd71ecb3389 100644
--- a/src/test/ui/drop/dynamic-drop-async.rs
+++ b/src/test/ui/drop/dynamic-drop-async.rs
@@ -4,6 +4,7 @@
 // * Dropping one of the values panics while dropping the future.
 
 // run-pass
+// needs-unwind
 // edition:2018
 // ignore-wasm32-bare compiled with panic=abort by default
 
diff --git a/src/test/ui/drop/dynamic-drop.rs b/src/test/ui/drop/dynamic-drop.rs
index 7bb43d5b50360..736123ed1198f 100644
--- a/src/test/ui/drop/dynamic-drop.rs
+++ b/src/test/ui/drop/dynamic-drop.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(generators, generator_trait)]
diff --git a/src/test/ui/drop/terminate-in-initializer.rs b/src/test/ui/drop/terminate-in-initializer.rs
index c9cb932e62af0..66f267aa7c7d8 100644
--- a/src/test/ui/drop/terminate-in-initializer.rs
+++ b/src/test/ui/drop/terminate-in-initializer.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 // Issue #787
diff --git a/src/test/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs b/src/test/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
index 74c6e501c9136..7a91cbdc2f5d4 100644
--- a/src/test/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
+++ b/src/test/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten no threads support
 
diff --git a/src/test/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs b/src/test/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
index bc15fcb0e3996..e84ff41b344a7 100644
--- a/src/test/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
+++ b/src/test/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten no threads support
 
diff --git a/src/test/ui/generator/generator-resume-after-panic.rs b/src/test/ui/generator/generator-resume-after-panic.rs
index 55704f40e9f2b..f2e67f1f750cc 100644
--- a/src/test/ui/generator/generator-resume-after-panic.rs
+++ b/src/test/ui/generator/generator-resume-after-panic.rs
@@ -1,4 +1,5 @@
 // run-fail
+// needs-unwind
 // error-pattern:generator resumed after panicking
 // ignore-emscripten no processes
 
diff --git a/src/test/ui/generator/panic-drops-resume.rs b/src/test/ui/generator/panic-drops-resume.rs
index 29f4788b2757f..8d8eb6a97b15a 100644
--- a/src/test/ui/generator/panic-drops-resume.rs
+++ b/src/test/ui/generator/panic-drops-resume.rs
@@ -1,6 +1,7 @@
 //! Tests that panics inside a generator will correctly drop the initial resume argument.
 
 // run-pass
+// needs-unwind
 // ignore-wasm       no unwind support
 // ignore-emscripten no unwind support
 
diff --git a/src/test/ui/generator/panic-drops.rs b/src/test/ui/generator/panic-drops.rs
index c9a201725aea2..a9de4e7fc7d25 100644
--- a/src/test/ui/generator/panic-drops.rs
+++ b/src/test/ui/generator/panic-drops.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 // ignore-wasm32-bare compiled with panic=abort by default
 
diff --git a/src/test/ui/generator/panic-safe.rs b/src/test/ui/generator/panic-safe.rs
index 500a3c9c2950e..14a0c8dbaf1da 100644
--- a/src/test/ui/generator/panic-safe.rs
+++ b/src/test/ui/generator/panic-safe.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 // ignore-wasm32-bare compiled with panic=abort by default
 
diff --git a/src/test/ui/generator/resume-after-return.rs b/src/test/ui/generator/resume-after-return.rs
index efed08bd4708f..538609b981adf 100644
--- a/src/test/ui/generator/resume-after-return.rs
+++ b/src/test/ui/generator/resume-after-return.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 // ignore-wasm32-bare compiled with panic=abort by default
 
diff --git a/src/test/ui/intrinsics/panic-uninitialized-zeroed.rs b/src/test/ui/intrinsics/panic-uninitialized-zeroed.rs
index 324bba15e4350..a1cfee944c8bd 100644
--- a/src/test/ui/intrinsics/panic-uninitialized-zeroed.rs
+++ b/src/test/ui/intrinsics/panic-uninitialized-zeroed.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // revisions: mir thir
 // [thir]compile-flags: -Zthir-unsafeck
diff --git a/src/test/ui/issues/issue-14875.rs b/src/test/ui/issues/issue-14875.rs
index 0d95d168b3db3..aaef2aab9fc76 100644
--- a/src/test/ui/issues/issue-14875.rs
+++ b/src/test/ui/issues/issue-14875.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 // Check that values are not leaked when a dtor panics (#14875)
diff --git a/src/test/ui/issues/issue-25089.rs b/src/test/ui/issues/issue-25089.rs
index cf261d43c55cb..0f0f78623a212 100644
--- a/src/test/ui/issues/issue-25089.rs
+++ b/src/test/ui/issues/issue-25089.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 use std::thread;
diff --git a/src/test/ui/issues/issue-26655.rs b/src/test/ui/issues/issue-26655.rs
index 4c01183a44060..cb386c908a489 100644
--- a/src/test/ui/issues/issue-26655.rs
+++ b/src/test/ui/issues/issue-26655.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 // Check that the destructors of simple enums are run on unwinding
diff --git a/src/test/ui/issues/issue-29485.rs b/src/test/ui/issues/issue-29485.rs
index 6b2fb7126e3df..8d58ee6d92c4b 100644
--- a/src/test/ui/issues/issue-29485.rs
+++ b/src/test/ui/issues/issue-29485.rs
@@ -1,6 +1,7 @@
 // run-pass
 #![allow(unused_attributes)]
 // aux-build:issue-29485.rs
+// needs-unwind
 // ignore-emscripten no threads
 
 #[feature(recover)]
diff --git a/src/test/ui/issues/issue-29948.rs b/src/test/ui/issues/issue-29948.rs
index 8ede8143ea657..01c3ec64861fe 100644
--- a/src/test/ui/issues/issue-29948.rs
+++ b/src/test/ui/issues/issue-29948.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 use std::panic;
diff --git a/src/test/ui/issues/issue-30018-panic.rs b/src/test/ui/issues/issue-30018-panic.rs
index 50749b0c742f2..cba3055a22111 100644
--- a/src/test/ui/issues/issue-30018-panic.rs
+++ b/src/test/ui/issues/issue-30018-panic.rs
@@ -4,6 +4,7 @@
 // spawned thread to isolate the expected error result from the
 // SIGTRAP injected by the drop-flag consistency checking.
 
+// needs-unwind
 // ignore-emscripten no threads support
 
 struct Foo;
diff --git a/src/test/ui/issues/issue-43853.rs b/src/test/ui/issues/issue-43853.rs
index 47c3ab59aa2eb..3162c091c8786 100644
--- a/src/test/ui/issues/issue-43853.rs
+++ b/src/test/ui/issues/issue-43853.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 use std::panic;
diff --git a/src/test/ui/issues/issue-46519.rs b/src/test/ui/issues/issue-46519.rs
index cca0995d4ca10..9bd3c0948517b 100644
--- a/src/test/ui/issues/issue-46519.rs
+++ b/src/test/ui/issues/issue-46519.rs
@@ -1,6 +1,7 @@
 // run-pass
 // compile-flags:--test -O
 
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 #[test]
diff --git a/src/test/ui/iterators/iter-count-overflow-debug.rs b/src/test/ui/iterators/iter-count-overflow-debug.rs
index 5a0394ae760e9..15f25f1ca5373 100644
--- a/src/test/ui/iterators/iter-count-overflow-debug.rs
+++ b/src/test/ui/iterators/iter-count-overflow-debug.rs
@@ -1,5 +1,6 @@
 // run-pass
 // only-32bit too impatient for 2⁶⁴ items
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes -C opt-level=3
 
diff --git a/src/test/ui/iterators/iter-position-overflow-debug.rs b/src/test/ui/iterators/iter-position-overflow-debug.rs
index 733ee0c46cc3d..65124c282412c 100644
--- a/src/test/ui/iterators/iter-position-overflow-debug.rs
+++ b/src/test/ui/iterators/iter-position-overflow-debug.rs
@@ -1,5 +1,6 @@
 // run-pass
 // only-32bit too impatient for 2⁶⁴ items
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes -C opt-level=3
 
diff --git a/src/test/ui/iterators/iter-step-overflow-debug.rs b/src/test/ui/iterators/iter-step-overflow-debug.rs
index 67605d2fcc253..e16f984de79a6 100644
--- a/src/test/ui/iterators/iter-step-overflow-debug.rs
+++ b/src/test/ui/iterators/iter-step-overflow-debug.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes
 
diff --git a/src/test/ui/iterators/iter-sum-overflow-debug.rs b/src/test/ui/iterators/iter-sum-overflow-debug.rs
index b7667d1bbf6d9..d8ce43848a77e 100644
--- a/src/test/ui/iterators/iter-sum-overflow-debug.rs
+++ b/src/test/ui/iterators/iter-sum-overflow-debug.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes
 
diff --git a/src/test/ui/iterators/iter-sum-overflow-overflow-checks.rs b/src/test/ui/iterators/iter-sum-overflow-overflow-checks.rs
index 04ca7f8a31534..bc8dcbdbb0e03 100644
--- a/src/test/ui/iterators/iter-sum-overflow-overflow-checks.rs
+++ b/src/test/ui/iterators/iter-sum-overflow-overflow-checks.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C overflow-checks
 
diff --git a/src/test/ui/macros/macro-comma-behavior-rpass.rs b/src/test/ui/macros/macro-comma-behavior-rpass.rs
index 780e158fe0b8f..dfd58b25d089d 100644
--- a/src/test/ui/macros/macro-comma-behavior-rpass.rs
+++ b/src/test/ui/macros/macro-comma-behavior-rpass.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(unused_imports)]
 // Ideally, any macro call with a trailing comma should behave
 // identically to a call without the comma.
diff --git a/src/test/ui/mir/mir_calls_to_shims.rs b/src/test/ui/mir/mir_calls_to_shims.rs
index 6f13d5612ce51..42eaab77da9f1 100644
--- a/src/test/ui/mir/mir_calls_to_shims.rs
+++ b/src/test/ui/mir/mir_calls_to_shims.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(fn_traits)]
diff --git a/src/test/ui/mir/mir_drop_order.rs b/src/test/ui/mir/mir_drop_order.rs
index 22c804abf5cc8..853efb0fed2b9 100644
--- a/src/test/ui/mir/mir_drop_order.rs
+++ b/src/test/ui/mir/mir_drop_order.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 use std::cell::RefCell;
diff --git a/src/test/ui/mir/mir_drop_panics.rs b/src/test/ui/mir/mir_drop_panics.rs
index bf269ee901b93..b4093d704150a 100644
--- a/src/test/ui/mir/mir_drop_panics.rs
+++ b/src/test/ui/mir/mir_drop_panics.rs
@@ -1,4 +1,5 @@
 // run-fail
+// needs-unwind
 // error-pattern:panic 1
 // error-pattern:drop 2
 // ignore-emscripten no processes
diff --git a/src/test/ui/mir/mir_dynamic_drops_3.rs b/src/test/ui/mir/mir_dynamic_drops_3.rs
index eb76fdff88647..2bcd9fac55cd5 100644
--- a/src/test/ui/mir/mir_dynamic_drops_3.rs
+++ b/src/test/ui/mir/mir_dynamic_drops_3.rs
@@ -1,4 +1,5 @@
 // run-fail
+// needs-unwind
 // error-pattern:unwind happens
 // error-pattern:drop 3
 // error-pattern:drop 2
diff --git a/src/test/ui/numbers-arithmetic/int-abs-overflow.rs b/src/test/ui/numbers-arithmetic/int-abs-overflow.rs
index 9c6dff7e1a6ca..d63ba8cb03e9a 100644
--- a/src/test/ui/numbers-arithmetic/int-abs-overflow.rs
+++ b/src/test/ui/numbers-arithmetic/int-abs-overflow.rs
@@ -1,6 +1,7 @@
 // run-pass
 // compile-flags: -C overflow-checks=on
 // ignore-emscripten no threads support
+// needs-unwind
 
 use std::thread;
 
diff --git a/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs b/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
index 101c5d50b20b9..f857d4f4c7f27 100644
--- a/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
+++ b/src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs
@@ -1,5 +1,6 @@
 // run-pass
 // compile-flags: -C debug_assertions=yes
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten dies with an LLVM error
 
diff --git a/src/test/ui/panics/panic-handler-chain.rs b/src/test/ui/panics/panic-handler-chain.rs
index 93044b5cb2591..73d6e790dff57 100644
--- a/src/test/ui/panics/panic-handler-chain.rs
+++ b/src/test/ui/panics/panic-handler-chain.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(stable_features)]
 
 // ignore-emscripten no threads support
diff --git a/src/test/ui/panics/panic-handler-flail-wildly.rs b/src/test/ui/panics/panic-handler-flail-wildly.rs
index 6badd203842ff..679dc7de87aba 100644
--- a/src/test/ui/panics/panic-handler-flail-wildly.rs
+++ b/src/test/ui/panics/panic-handler-flail-wildly.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 #![allow(stable_features)]
 #![allow(unused_must_use)]
diff --git a/src/test/ui/panics/panic-handler-set-twice.rs b/src/test/ui/panics/panic-handler-set-twice.rs
index 0312ed221ca35..2744530209026 100644
--- a/src/test/ui/panics/panic-handler-set-twice.rs
+++ b/src/test/ui/panics/panic-handler-set-twice.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(unused_variables)]
 #![allow(stable_features)]
 
diff --git a/src/test/ui/panics/panic-in-dtor-drops-fields.rs b/src/test/ui/panics/panic-in-dtor-drops-fields.rs
index caddd942dc0a0..c0963aa3114dc 100644
--- a/src/test/ui/panics/panic-in-dtor-drops-fields.rs
+++ b/src/test/ui/panics/panic-in-dtor-drops-fields.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(dead_code)]
 #![allow(non_upper_case_globals)]
 
diff --git a/src/test/ui/panics/panic-recover-propagate.rs b/src/test/ui/panics/panic-recover-propagate.rs
index 7969336ca749b..e110d94b65614 100644
--- a/src/test/ui/panics/panic-recover-propagate.rs
+++ b/src/test/ui/panics/panic-recover-propagate.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 use std::sync::atomic::{AtomicUsize, Ordering};
diff --git a/src/test/ui/privacy/reachable-unnameable-items.rs b/src/test/ui/privacy/reachable-unnameable-items.rs
index f1e53a0d8b426..1c91541e64229 100644
--- a/src/test/ui/privacy/reachable-unnameable-items.rs
+++ b/src/test/ui/privacy/reachable-unnameable-items.rs
@@ -1,5 +1,6 @@
 // run-pass
 // ignore-wasm32-bare compiled with panic=abort by default
+// needs-unwind
 // aux-build:reachable-unnameable-items.rs
 
 extern crate reachable_unnameable_items;
diff --git a/src/test/ui/proc-macro/expand-with-a-macro.rs b/src/test/ui/proc-macro/expand-with-a-macro.rs
index 418178d0f0ead..21a4547d11e1c 100644
--- a/src/test/ui/proc-macro/expand-with-a-macro.rs
+++ b/src/test/ui/proc-macro/expand-with-a-macro.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // aux-build:expand-with-a-macro.rs
 
 // ignore-wasm32-bare compiled with panic=abort by default
diff --git a/src/test/ui/rfc-1937-termination-trait/termination-trait-in-test.rs b/src/test/ui/rfc-1937-termination-trait/termination-trait-in-test.rs
index 0bd7bf3d51a78..cd57d9bca9429 100644
--- a/src/test/ui/rfc-1937-termination-trait/termination-trait-in-test.rs
+++ b/src/test/ui/rfc-1937-termination-trait/termination-trait-in-test.rs
@@ -1,5 +1,6 @@
 // compile-flags: --test
 // run-pass
+// needs-unwind
 
 // ignore-wasm32-bare compiled with panic=abort by default
 
diff --git a/src/test/ui/rfc-2091-track-caller/std-panic-locations.rs b/src/test/ui/rfc-2091-track-caller/std-panic-locations.rs
index f0850d5c1f1e9..b067994a5c6d8 100644
--- a/src/test/ui/rfc-2091-track-caller/std-panic-locations.rs
+++ b/src/test/ui/rfc-2091-track-caller/std-panic-locations.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // revisions: default mir-opt
 //[mir-opt] compile-flags: -Zmir-opt-level=4
diff --git a/src/test/ui/rfcs/rfc1857-drop-order.rs b/src/test/ui/rfcs/rfc1857-drop-order.rs
index 7923aa7c0e22f..243b7fb6fadec 100644
--- a/src/test/ui/rfcs/rfc1857-drop-order.rs
+++ b/src/test/ui/rfcs/rfc1857-drop-order.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 
 #![allow(dead_code, unreachable_code)]
diff --git a/src/test/ui/runtime/rt-explody-panic-payloads.rs b/src/test/ui/runtime/rt-explody-panic-payloads.rs
index dc193582c6a50..eb5bf8f67a849 100644
--- a/src/test/ui/runtime/rt-explody-panic-payloads.rs
+++ b/src/test/ui/runtime/rt-explody-panic-payloads.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no processes
 // ignore-sgx no processes
 // ignore-wasm32-bare no unwinding panic
diff --git a/src/test/ui/sepcomp/sepcomp-unwind.rs b/src/test/ui/sepcomp/sepcomp-unwind.rs
index 50a4e043943f0..a59e25a273e70 100644
--- a/src/test/ui/sepcomp/sepcomp-unwind.rs
+++ b/src/test/ui/sepcomp/sepcomp-unwind.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 #![allow(dead_code)]
 // compile-flags: -C codegen-units=3
 // ignore-emscripten no threads support
diff --git a/src/test/ui/structs-enums/unit-like-struct-drop-run.rs b/src/test/ui/structs-enums/unit-like-struct-drop-run.rs
index 980fd97e2c678..1e9c269a4d375 100644
--- a/src/test/ui/structs-enums/unit-like-struct-drop-run.rs
+++ b/src/test/ui/structs-enums/unit-like-struct-drop-run.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 // Make sure the destructor is run for unit-like structs.
diff --git a/src/test/ui/test-attrs/test-should-fail-good-message.rs b/src/test/ui/test-attrs/test-should-fail-good-message.rs
index 9fa759f9eb483..3260b6938f07d 100644
--- a/src/test/ui/test-attrs/test-should-fail-good-message.rs
+++ b/src/test/ui/test-attrs/test-should-fail-good-message.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: --test
 #[test]
diff --git a/src/test/ui/threads-sendsync/task-stderr.rs b/src/test/ui/threads-sendsync/task-stderr.rs
index 78145e337dafb..68d226ffbaee3 100644
--- a/src/test/ui/threads-sendsync/task-stderr.rs
+++ b/src/test/ui/threads-sendsync/task-stderr.rs
@@ -1,5 +1,6 @@
 // run-pass
 // ignore-emscripten no threads support
+// needs-unwind
 
 #![feature(internal_output_capture)]
 
diff --git a/src/test/ui/threads-sendsync/unwind-resource.rs b/src/test/ui/threads-sendsync/unwind-resource.rs
index a063bef0822f2..6950a9c40d27d 100644
--- a/src/test/ui/threads-sendsync/unwind-resource.rs
+++ b/src/test/ui/threads-sendsync/unwind-resource.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 
 #![allow(non_camel_case_types)]
 // ignore-emscripten no threads support
diff --git a/src/test/ui/unwind-unique.rs b/src/test/ui/unwind-unique.rs
index 7ca53b664ac6c..50ecf751a86db 100644
--- a/src/test/ui/unwind-unique.rs
+++ b/src/test/ui/unwind-unique.rs
@@ -1,4 +1,5 @@
 // run-pass
+// needs-unwind
 // ignore-emscripten no threads support
 
 use std::thread;