diff --git a/tests/ui/const-generics/occurs-check/unify-fixpoint.rs b/tests/ui/const-generics/occurs-check/unify-fixpoint.rs
index 1c1ed41051da2..02bc90988e2c0 100644
--- a/tests/ui/const-generics/occurs-check/unify-fixpoint.rs
+++ b/tests/ui/const-generics/occurs-check/unify-fixpoint.rs
@@ -1,3 +1,8 @@
+// -Zunstable-options added as test for ICE #97725 (left == right)`
+// left: `Binder(<[u8; _] as std::default::Default>, [])`,
+// right: `Binder(<[u8; 4] as std::default::Default>, [])
+
+//@ compile-flags: -Zunstable-options
 //@ check-pass
 #![feature(generic_const_exprs)] //~ WARN the feature `generic_const_exprs` is incomplete
 
diff --git a/tests/ui/const-generics/occurs-check/unify-fixpoint.stderr b/tests/ui/const-generics/occurs-check/unify-fixpoint.stderr
index fe3f24a67a260..8b63e8c55d5c9 100644
--- a/tests/ui/const-generics/occurs-check/unify-fixpoint.stderr
+++ b/tests/ui/const-generics/occurs-check/unify-fixpoint.stderr
@@ -1,5 +1,5 @@
 warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
-  --> $DIR/unify-fixpoint.rs:2:12
+  --> $DIR/unify-fixpoint.rs:7:12
    |
 LL | #![feature(generic_const_exprs)]
    |            ^^^^^^^^^^^^^^^^^^^
diff --git a/tests/ui/parser/parser-ice-ed2021-await-105210.rs b/tests/ui/parser/parser-ice-ed2021-await-105210.rs
new file mode 100644
index 0000000000000..95383cc81c21e
--- /dev/null
+++ b/tests/ui/parser/parser-ice-ed2021-await-105210.rs
@@ -0,0 +1,10 @@
+// ICE #105210 self.lines.iter().all(|r| !r.iter().any(|sc| sc.chr == \'\\t\'))
+// ignore-tidy-tab
+//@ edition:2021
+pub fn main() {}
+
+fn box () {
+ (( h (const {( default ( await ( await (	(move {await((((}}
+ //~^ ERROR mismatched closing delimiter: `}`
+ //~^^ ERROR mismatched closing delimiter: `}`
+//~ ERROR this file contains an unclosed delimiter
diff --git a/tests/ui/parser/parser-ice-ed2021-await-105210.stderr b/tests/ui/parser/parser-ice-ed2021-await-105210.stderr
new file mode 100644
index 0000000000000..fc54476c22048
--- /dev/null
+++ b/tests/ui/parser/parser-ice-ed2021-await-105210.stderr
@@ -0,0 +1,34 @@
+error: mismatched closing delimiter: `}`
+  --> $DIR/parser-ice-ed2021-await-105210.rs:7:58
+   |
+LL |  (( h (const {( default ( await ( await (    (move {await((((}}
+   |                                                    -        ^^ mismatched closing delimiter
+   |                                                    |        |
+   |                                                    |        unclosed delimiter
+   |                                                    closing delimiter possibly meant for this
+
+error: mismatched closing delimiter: `}`
+  --> $DIR/parser-ice-ed2021-await-105210.rs:7:43
+   |
+LL |  (( h (const {( default ( await ( await (    (move {await((((}}
+   |              -                               ^                ^ mismatched closing delimiter
+   |              |                               |
+   |              |                               unclosed delimiter
+   |              closing delimiter possibly meant for this
+
+error: this file contains an unclosed delimiter
+  --> $DIR/parser-ice-ed2021-await-105210.rs:10:52
+   |
+LL | fn box () {
+   |           - unclosed delimiter
+LL |  (( h (const {( default ( await ( await (    (move {await((((}}
+   |  --   - unclosed delimiter
+   |  ||
+   |  |unclosed delimiter
+   |  unclosed delimiter
+...
+LL |
+   |                                                    ^
+
+error: aborting due to 3 previous errors
+