diff --git a/codegen/ui_tests/rhai_fn_non_clonable_return.stderr b/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
index ba165394..9d946726 100644
--- a/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
+++ b/codegen/ui_tests/rhai_fn_non_clonable_return.stderr
@@ -10,5 +10,5 @@ error[E0277]: the trait bound `NonClonable: Clone` is not satisfied
 note: required by a bound in `rhai::Dynamic::from`
     --> $WORKSPACE/src/types/dynamic.rs
      |
-     |     pub fn from<T: Variant + Clone>(mut value: T) -> Self {
+     |     pub fn from<T: Variant + Clone>(value: T) -> Self {
      |                              ^^^^^ required by this bound in `rhai::Dynamic::from`
diff --git a/codegen/ui_tests/rhai_mod_non_clonable_return.stderr b/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
index 8cd59893..1d664c65 100644
--- a/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
+++ b/codegen/ui_tests/rhai_mod_non_clonable_return.stderr
@@ -10,5 +10,5 @@ error[E0277]: the trait bound `NonClonable: Clone` is not satisfied
 note: required by a bound in `rhai::Dynamic::from`
     --> $WORKSPACE/src/types/dynamic.rs
      |
-     |     pub fn from<T: Variant + Clone>(mut value: T) -> Self {
+     |     pub fn from<T: Variant + Clone>(value: T) -> Self {
      |                              ^^^^^ required by this bound in `rhai::Dynamic::from`