diff --git a/serde_derive/src/bound.rs b/serde_derive/src/bound.rs
index dd51e6898..fe8ccfff5 100644
--- a/serde_derive/src/bound.rs
+++ b/serde_derive/src/bound.rs
@@ -144,6 +144,7 @@ pub fn with_bound(
 
         fn visit_type(&mut self, ty: &'ast syn::Type) {
             match ty {
+                #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                 syn::Type::Array(ty) => self.visit_type(&ty.elem),
                 syn::Type::BareFn(ty) => {
                     for arg in &ty.inputs {
@@ -181,7 +182,6 @@ pub fn with_bound(
 
                 syn::Type::Infer(_) | syn::Type::Never(_) | syn::Type::Verbatim(_) => {}
 
-                #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                 _ => {}
             }
         }
@@ -196,16 +196,13 @@ pub fn with_bound(
                 syn::PathArguments::AngleBracketed(arguments) => {
                     for arg in &arguments.args {
                         match arg {
+                            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                             syn::GenericArgument::Type(arg) => self.visit_type(arg),
                             syn::GenericArgument::AssocType(arg) => self.visit_type(&arg.ty),
                             syn::GenericArgument::Lifetime(_)
                             | syn::GenericArgument::Const(_)
                             | syn::GenericArgument::AssocConst(_)
                             | syn::GenericArgument::Constraint(_) => {}
-                            #[cfg_attr(
-                                all(test, exhaustive),
-                                deny(non_exhaustive_omitted_patterns)
-                            )]
                             _ => {}
                         }
                     }
@@ -228,9 +225,9 @@ pub fn with_bound(
 
         fn visit_type_param_bound(&mut self, bound: &'ast syn::TypeParamBound) {
             match bound {
+                #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                 syn::TypeParamBound::Trait(bound) => self.visit_path(&bound.path),
                 syn::TypeParamBound::Lifetime(_) | syn::TypeParamBound::Verbatim(_) => {}
-                #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                 _ => {}
             }
         }
diff --git a/serde_derive/src/internals/attr.rs b/serde_derive/src/internals/attr.rs
index 58d18b403..bb9de328a 100644
--- a/serde_derive/src/internals/attr.rs
+++ b/serde_derive/src/internals/attr.rs
@@ -1794,6 +1794,7 @@ fn borrowable_lifetimes(
 
 fn collect_lifetimes(ty: &syn::Type, out: &mut BTreeSet<syn::Lifetime>) {
     match ty {
+        #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
         syn::Type::Slice(ty) => {
             collect_lifetimes(&ty.elem, out);
         }
@@ -1854,7 +1855,6 @@ fn collect_lifetimes(ty: &syn::Type, out: &mut BTreeSet<syn::Lifetime>) {
         | syn::Type::Infer(_)
         | syn::Type::Verbatim(_) => {}
 
-        #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
         _ => {}
     }
 }
diff --git a/serde_derive/src/internals/receiver.rs b/serde_derive/src/internals/receiver.rs
index 6273dfece..fa2a77d24 100644
--- a/serde_derive/src/internals/receiver.rs
+++ b/serde_derive/src/internals/receiver.rs
@@ -107,6 +107,7 @@ impl ReplaceReceiver<'_> {
 
     fn visit_type_mut_impl(&mut self, ty: &mut Type) {
         match ty {
+            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
             Type::Array(ty) => {
                 self.visit_type_mut(&mut ty.elem);
                 self.visit_expr_mut(&mut ty.len);
@@ -147,7 +148,6 @@ impl ReplaceReceiver<'_> {
 
             Type::Infer(_) | Type::Never(_) | Type::Verbatim(_) => {}
 
-            #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
             _ => {}
         }
     }
@@ -178,13 +178,13 @@ impl ReplaceReceiver<'_> {
             PathArguments::AngleBracketed(arguments) => {
                 for arg in &mut arguments.args {
                     match arg {
+                        #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                         GenericArgument::Type(arg) => self.visit_type_mut(arg),
                         GenericArgument::AssocType(arg) => self.visit_type_mut(&mut arg.ty),
                         GenericArgument::Lifetime(_)
                         | GenericArgument::Const(_)
                         | GenericArgument::AssocConst(_)
                         | GenericArgument::Constraint(_) => {}
-                        #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                         _ => {}
                     }
                 }
@@ -207,9 +207,9 @@ impl ReplaceReceiver<'_> {
 
     fn visit_type_param_bound_mut(&mut self, bound: &mut TypeParamBound) {
         match bound {
+            #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
             TypeParamBound::Trait(bound) => self.visit_path_mut(&mut bound.path),
             TypeParamBound::Lifetime(_) | TypeParamBound::Verbatim(_) => {}
-            #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
             _ => {}
         }
     }
@@ -228,6 +228,7 @@ impl ReplaceReceiver<'_> {
         if let Some(where_clause) = &mut generics.where_clause {
             for predicate in &mut where_clause.predicates {
                 match predicate {
+                    #![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                     WherePredicate::Type(predicate) => {
                         self.visit_type_mut(&mut predicate.bounded_ty);
                         for bound in &mut predicate.bounds {
@@ -235,7 +236,6 @@ impl ReplaceReceiver<'_> {
                         }
                     }
                     WherePredicate::Lifetime(_) => {}
-                    #[cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
                     _ => {}
                 }
             }