diff --git a/nemo/src/io/parser.rs b/nemo/src/io/parser.rs
index a897519a4..737915fba 100644
--- a/nemo/src/io/parser.rs
+++ b/nemo/src/io/parser.rs
@@ -2335,7 +2335,7 @@ mod test {
         );
 
         let ident = "foo";
-        let key = Key::identifier(Identifier(ident.to_string()));
+        let key = Key::from_identifier(Identifier(ident.to_string()));
 
         assert_parse!(parser.parse_map_key(), ident, key.clone());
 
@@ -2351,11 +2351,11 @@ mod test {
 
         let pairs = vec![
             (
-                Key::string("23".to_string()),
+                Key::from_string("23".to_string()),
                 Constant::NumericLiteral(NumericLiteral::Integer(42)),
             ),
             (
-                Key::identifier(Identifier("foo".to_string())),
+                Key::from_identifier(Identifier("foo".to_string())),
                 Constant::NumericLiteral(NumericLiteral::Integer(23)),
             ),
         ];
diff --git a/nemo/src/model/rule_model/map.rs b/nemo/src/model/rule_model/map.rs
index ffffe0df6..06352df97 100644
--- a/nemo/src/model/rule_model/map.rs
+++ b/nemo/src/model/rule_model/map.rs
@@ -13,12 +13,12 @@ pub enum Key {
 
 impl Key {
     /// Construct a new [Key] from a [String].
-    pub fn string(s: String) -> Self {
+    pub fn from_string(s: String) -> Self {
         Self::String(s)
     }
 
     /// Construct a new [Key] from an [Identifier].
-    pub fn identifier(i: Identifier) -> Self {
+    pub fn from_identifier(i: Identifier) -> Self {
         Self::Identifier(i)
     }