diff --git a/lang/rust/avro/tests/validators.rs b/lang/rust/avro/tests/validators.rs
index 941ffc3e7d7..fc45353a8d6 100644
--- a/lang/rust/avro/tests/validators.rs
+++ b/lang/rust/avro/tests/validators.rs
@@ -28,35 +28,35 @@ use apache_avro_test_helper::TestResult;
 
 struct CustomValidator;
 
-#[test]
-fn avro_3900_custom_validator_with_spec_invalid_names() -> TestResult {
-    // Setup the custom validators before the schema is parsed
-    // because the parsing will trigger the validation and will
-    // setup the default validator (SpecificationValidator)!
-    impl SchemaNameValidator for CustomValidator {
-        fn validate(&self, schema_name: &str) -> AvroResult<(String, Namespace)> {
-            Ok((schema_name.to_string(), None))
-        }
+// Setup the custom validators before the schema is parsed
+// because the parsing will trigger the validation and will
+// setup the default validator (SpecificationValidator)!
+impl SchemaNameValidator for CustomValidator {
+    fn validate(&self, schema_name: &str) -> AvroResult<(String, Namespace)> {
+        Ok((schema_name.to_string(), None))
     }
+}
 
-    impl SchemaNamespaceValidator for CustomValidator {
-        fn validate(&self, _ns: &str) -> AvroResult<()> {
-            Ok(())
-        }
+impl SchemaNamespaceValidator for CustomValidator {
+    fn validate(&self, _ns: &str) -> AvroResult<()> {
+        Ok(())
     }
+}
 
-    impl EnumSymbolNameValidator for CustomValidator {
-        fn validate(&self, _ns: &str) -> AvroResult<()> {
-            Ok(())
-        }
+impl EnumSymbolNameValidator for CustomValidator {
+    fn validate(&self, _ns: &str) -> AvroResult<()> {
+        Ok(())
     }
+}
 
-    impl RecordFieldNameValidator for CustomValidator {
-        fn validate(&self, _ns: &str) -> AvroResult<()> {
-            Ok(())
-        }
+impl RecordFieldNameValidator for CustomValidator {
+    fn validate(&self, _ns: &str) -> AvroResult<()> {
+        Ok(())
     }
+}
 
+#[test]
+fn avro_3900_custom_validator_with_spec_invalid_names() -> TestResult {
     assert!(set_schema_name_validator(Box::new(CustomValidator)).is_ok());
     assert!(set_schema_namespace_validator(Box::new(CustomValidator)).is_ok());
     assert!(set_enum_symbol_name_validator(Box::new(CustomValidator)).is_ok());
diff --git a/lang/rust/avro_test_helper/src/lib.rs b/lang/rust/avro_test_helper/src/lib.rs
index 5e1e04b50ae..e316dc818d4 100644
--- a/lang/rust/avro_test_helper/src/lib.rs
+++ b/lang/rust/avro_test_helper/src/lib.rs
@@ -23,7 +23,7 @@ thread_local! {
     // The unit tests run in parallel
     // We need to keep the log messages in a thread-local variable
     // and clear them after assertion
-    pub(crate) static LOG_MESSAGES: RefCell<Vec<String>> = RefCell::new(Vec::new());
+    pub(crate) static LOG_MESSAGES: RefCell<Vec<String>> = const { RefCell::new(Vec::new()) };
 }
 
 pub mod logger;