diff --git a/src/test/ui/generator/conditional-drop.rs b/src/test/ui/generator/conditional-drop.rs
index 990d94e6efc..0927df86927 100644
--- a/src/test/ui/generator/conditional-drop.rs
+++ b/src/test/ui/generator/conditional-drop.rs
@@ -1,5 +1,8 @@
 // run-pass
 
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
 #![feature(generators, generator_trait)]
 
 use std::ops::Generator;
diff --git a/src/test/ui/generator/control-flow.rs b/src/test/ui/generator/control-flow.rs
index 9d4c217b76e..4f69c785560 100644
--- a/src/test/ui/generator/control-flow.rs
+++ b/src/test/ui/generator/control-flow.rs
@@ -1,5 +1,8 @@
 // run-pass
 
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
 #![feature(generators, generator_trait)]
 
 use std::marker::Unpin;
diff --git a/src/test/ui/generator/drop-env.rs b/src/test/ui/generator/drop-env.rs
index 7ba71188104..66dfb8c2c09 100644
--- a/src/test/ui/generator/drop-env.rs
+++ b/src/test/ui/generator/drop-env.rs
@@ -1,5 +1,8 @@
 // run-pass
 
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
 #![feature(generators, generator_trait)]
 
 use std::ops::Generator;
diff --git a/src/test/ui/generator/smoke-resume-args.rs b/src/test/ui/generator/smoke-resume-args.rs
index 32f3ee32d77..fa9271c538f 100644
--- a/src/test/ui/generator/smoke-resume-args.rs
+++ b/src/test/ui/generator/smoke-resume-args.rs
@@ -1,5 +1,8 @@
 // run-pass
 
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
 #![feature(generators, generator_trait)]
 
 use std::fmt::Debug;
diff --git a/src/test/ui/generator/smoke.rs b/src/test/ui/generator/smoke.rs
index 9289710b34b..7a917a05dd9 100644
--- a/src/test/ui/generator/smoke.rs
+++ b/src/test/ui/generator/smoke.rs
@@ -1,5 +1,8 @@
 // run-pass
 
+// revisions: default nomiropt
+//[nomiropt]compile-flags: -Z mir-opt-level=0
+
 // ignore-emscripten no threads support
 // compile-flags: --test