diff --git a/tests/crashes/121363.rs b/tests/crashes/121363.rs
index 2a5b6274496..38796342284 100644
--- a/tests/crashes/121363.rs
+++ b/tests/crashes/121363.rs
@@ -1,5 +1,5 @@
 //@ known-bug: #121363
-//@ compile-flags: -Zmir-opt-level=5 --crate-type lib
+//@ compile-flags: -Zmir-enable-passes=+GVN --crate-type lib
 
 #![feature(trivial_bounds)]
 
diff --git a/tests/crashes/128094.rs b/tests/crashes/128094.rs
index 105a1c84a65..5f0ae108f8f 100644
--- a/tests/crashes/128094.rs
+++ b/tests/crashes/128094.rs
@@ -1,5 +1,5 @@
 //@ known-bug: rust-lang/rust#128094
-//@ compile-flags: -Zmir-opt-level=5 --edition=2018
+//@ compile-flags: -Zmir-enable-passes=+GVN --edition=2018
 
 pub enum Request {
     TestSome(T),
diff --git a/tests/crashes/129095.rs b/tests/crashes/129095.rs
index ea70c0565fc..d82474e18e7 100644
--- a/tests/crashes/129095.rs
+++ b/tests/crashes/129095.rs
@@ -1,5 +1,5 @@
 //@ known-bug: rust-lang/rust#129095
-//@ compile-flags: -Zmir-opt-level=5 -Zvalidate-mir
+//@ compile-flags: -Zmir-enable-passes=+GVN -Zmir-enable-passes=+Inline -Zvalidate-mir
 
 pub fn function_with_bytes<const BYTES: &'static [u8; 4]>() -> &'static [u8] {
     BYTES
diff --git a/tests/crashes/129109.rs b/tests/crashes/129109.rs
index 8b9ebdf03c7..0db53b98a71 100644
--- a/tests/crashes/129109.rs
+++ b/tests/crashes/129109.rs
@@ -1,5 +1,5 @@
 //@ known-bug: rust-lang/rust#129109
-//@ compile-flags: -Zmir-opt-level=5 -Zvalidate-mir
+//@ compile-flags: -Zmir-enable-passes=+GVN -Zvalidate-mir
 
 extern "C" {
     pub static mut symbol: [i8];
diff --git a/tests/crashes/130970.rs b/tests/crashes/130970.rs
index e1f59c155a5..698c2b478e1 100644
--- a/tests/crashes/130970.rs
+++ b/tests/crashes/130970.rs
@@ -1,5 +1,5 @@
 //@ known-bug: #130970
-//@ compile-flags: -Zmir-opt-level=5 -Zvalidate-mir
+//@ compile-flags: -Zmir-enable-passes=+GVN -Zvalidate-mir
 
 fn main() {
     extern "C" {
diff --git a/tests/crashes/131347.rs b/tests/crashes/131347.rs
index 15f367d79e2..08f7d068e25 100644
--- a/tests/crashes/131347.rs
+++ b/tests/crashes/131347.rs
@@ -1,5 +1,5 @@
 //@ known-bug: #131347
-//@ compile-flags: -Zmir-opt-level=5 -Zvalidate-mir
+//@ compile-flags: -Zmir-enable-passes=+GVN -Zmir-enable-passes=+Inline -Zvalidate-mir
 
 struct S;
 static STUFF: [i8] = [0; S::N];
diff --git a/tests/crashes/131507.rs b/tests/crashes/131507.rs
index d402fb8afc3..05b5e76bed7 100644
--- a/tests/crashes/131507.rs
+++ b/tests/crashes/131507.rs
@@ -1,5 +1,5 @@
 //@ known-bug: #131507
-//@ compile-flags: -Zmir-opt-level=5 -Zvalidate-mir
+//@ compile-flags: -Zmir-enable-passes=+GVN -Zmir-enable-passes=+Inline -Zvalidate-mir
 #![feature(non_lifetime_binders)]
 
 fn brick()