diff --git a/codegen/ui_tests/non_clonable.stderr b/codegen/ui_tests/non_clonable.stderr
index 8a8fc1f1..5e50c242 100644
--- a/codegen/ui_tests/non_clonable.stderr
+++ b/codegen/ui_tests/non_clonable.stderr
@@ -12,3 +12,7 @@ note: required by a bound in `rhai::Dynamic::cast`
      |     pub fn cast<T: Any + Clone>(self) -> T {
      |                          ^^^^^ required by this bound in `rhai::Dynamic::cast`
      = note: this error originates in the attribute macro `export_fn` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `NonClonable` with `#[derive(Clone)]`
+     |
+3    | #[derive(Clone)]
+     |
diff --git a/codegen/ui_tests/non_clonable_second.stderr b/codegen/ui_tests/non_clonable_second.stderr
index 413c3a70..a4c40461 100644
--- a/codegen/ui_tests/non_clonable_second.stderr
+++ b/codegen/ui_tests/non_clonable_second.stderr
@@ -12,3 +12,7 @@ note: required by a bound in `rhai::Dynamic::cast`
      |     pub fn cast<T: Any + Clone>(self) -> T {
      |                          ^^^^^ required by this bound in `rhai::Dynamic::cast`
      = note: this error originates in the attribute macro `export_fn` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `NonClonable` with `#[derive(Clone)]`
+     |
+3    | #[derive(Clone)]
+     |
diff --git a/codegen/ui_tests/rhai_fn_non_clonable_return.stderr b/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
index efcd40de..78260a4a 100644
--- a/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
+++ b/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
@@ -12,3 +12,7 @@ note: required by a bound in `rhai::Dynamic::from`
      |     pub fn from<T: Variant + Clone>(value: T) -> Self {
      |                              ^^^^^ required by this bound in `rhai::Dynamic::from`
      = note: this error originates in the attribute macro `export_fn` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `NonClonable` with `#[derive(Clone)]`
+     |
+3    | #[derive(Clone)]
+     |
diff --git a/codegen/ui_tests/rhai_mod_non_clonable_return.stderr b/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
index d96fe2c8..7e646bcd 100644
--- a/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
+++ b/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
@@ -13,3 +13,7 @@ note: required by a bound in `rhai::Dynamic::from`
      |     pub fn from<T: Variant + Clone>(value: T) -> Self {
      |                              ^^^^^ required by this bound in `rhai::Dynamic::from`
      = note: this error originates in the attribute macro `export_module` (in Nightly builds, run with -Z macro-backtrace for more info)
+help: consider annotating `NonClonable` with `#[derive(Clone)]`
+     |
+3    | #[derive(Clone)]
+     |