diff --git a/test_suite/tests/regression/issue2371.rs b/test_suite/tests/regression/issue2371.rs
index e4832af38..7668af1db 100644
--- a/test_suite/tests/regression/issue2371.rs
+++ b/test_suite/tests/regression/issue2371.rs
@@ -7,7 +7,9 @@ pub struct Nested;
 pub enum ExternallyTagged {
     Flatten {
         #[serde(flatten)]
+        #[allow(dead_code)]
         nested: Nested,
+        #[allow(dead_code)]
         string: &'static str,
     },
 }
@@ -17,7 +19,9 @@ pub enum ExternallyTagged {
 pub enum InternallyTagged {
     Flatten {
         #[serde(flatten)]
+        #[allow(dead_code)]
         nested: Nested,
+        #[allow(dead_code)]
         string: &'static str,
     },
 }
@@ -27,7 +31,9 @@ pub enum InternallyTagged {
 pub enum AdjacentlyTagged {
     Flatten {
         #[serde(flatten)]
+        #[allow(dead_code)]
         nested: Nested,
+        #[allow(dead_code)]
         string: &'static str,
     },
 }
@@ -37,7 +43,9 @@ pub enum AdjacentlyTagged {
 pub enum UntaggedWorkaround {
     Flatten {
         #[serde(flatten)]
+        #[allow(dead_code)]
         nested: Nested,
+        #[allow(dead_code)]
         string: &'static str,
     },
 }
diff --git a/test_suite/tests/test_gen.rs b/test_suite/tests/test_gen.rs
index 055fae60c..4aaf06a8b 100644
--- a/test_suite/tests/test_gen.rs
+++ b/test_suite/tests/test_gen.rs
@@ -687,8 +687,16 @@ fn test_gen() {
     #[derive(Deserialize)]
     #[serde(untagged)]
     pub enum UntaggedWithBorrow<'a> {
-        Single(#[serde(borrow)] RelObject<'a>),
-        Many(#[serde(borrow)] Vec<RelObject<'a>>),
+        Single(
+            #[serde(borrow)]
+            #[allow(dead_code)]
+            RelObject<'a>,
+        ),
+        Many(
+            #[serde(borrow)]
+            #[allow(dead_code)]
+            Vec<RelObject<'a>>,
+        ),
     }
 
     #[derive(Deserialize)]