diff --git a/dsc_lib/src/functions/int.rs b/dsc_lib/src/functions/int.rs
index 03281c35f..f1e497b45 100644
--- a/dsc_lib/src/functions/int.rs
+++ b/dsc_lib/src/functions/int.rs
@@ -67,6 +67,27 @@ mod tests {
         assert_eq!(result, 123);
     }
 
+    #[test]
+    fn float() {
+        let mut parser = Statement::new().unwrap();
+        let err = parser.parse_and_execute("[int(1.0)]", &Context::new()).unwrap_err();
+        assert!(matches!(err, DscError::Parser(_)));
+    }
+
+    #[test]
+    fn incomplete_float_missing_digit() {
+        let mut parser = Statement::new().unwrap();
+        let err = parser.parse_and_execute("[int(.2)]", &Context::new()).unwrap_err();
+        assert!(matches!(err, DscError::Parser(_)));
+    }
+
+    #[test]
+    fn incomplete_float_missing_decimal() {
+        let mut parser = Statement::new().unwrap();
+        let err = parser.parse_and_execute("[int(2.)]", &Context::new()).unwrap_err();
+        assert!(matches!(err, DscError::Parser(_)));
+    }
+
     #[test]
     fn nested() {
         let mut parser = Statement::new().unwrap();
@@ -77,7 +98,7 @@ mod tests {
     #[test]
     fn error() {
         let mut parser = Statement::new().unwrap();
-        let err = parser.parse_and_execute("[int('foo')]", &Context::new()).unwrap_err();
+        let err = parser.parse_and_execute("[int('foo.1')]", &Context::new()).unwrap_err();
         assert!(matches!(err, DscError::FunctionArg(_, _)));
     }
 }
diff --git a/dsc_lib/src/parser/functions.rs b/dsc_lib/src/parser/functions.rs
index c4b11ada5..0c7409ebf 100644
--- a/dsc_lib/src/parser/functions.rs
+++ b/dsc_lib/src/parser/functions.rs
@@ -36,13 +36,23 @@ impl Function {
     ///
     /// This function will return an error if the function node is not valid.
     pub fn new(statement_bytes: &[u8], function: &Node) -> Result<Self, DscError> {
-        let Some(function_name) = function.child_by_field_name("name") else {
+        let mut function_name = None;
+        let mut function_args = None;
+        let mut cursor = function.walk();
+        for member in function.named_children(&mut cursor) {
+            match member.kind() {
+                "arguments" => function_args = Some(member),
+                "functionName" => function_name = Some(member),
+                "ERROR" => return Err(DscError::Parser("Found error node parsing function".to_string())),
+                _ => {}
+            }
+        }
+        let Some(name) = function_name else {
             return Err(DscError::Parser("Function name node not found".to_string()));
         };
-        let function_args = function.child_by_field_name("args");
         let args = convert_args_node(statement_bytes, &function_args)?;
         Ok(Function{
-            name: function_name.utf8_text(statement_bytes)?.to_string(),
+            name: name.utf8_text(statement_bytes)?.to_string(),
             args})
     }
 
diff --git a/tree-sitter-dscexpression/corpus/invalid_expressions.txt b/tree-sitter-dscexpression/corpus/invalid_expressions.txt
index dbc1fbb6f..2914a0662 100644
--- a/tree-sitter-dscexpression/corpus/invalid_expressions.txt
+++ b/tree-sitter-dscexpression/corpus/invalid_expressions.txt
@@ -110,3 +110,62 @@ Incomplete expression
         (function
           (functionName)))
       (MISSING "]"))
+
+=====
+Invalid float argument
+=====
+[myFunction(a.1)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (ERROR
+            (functionName))
+          (arguments
+            (number)))))
+
+=====
+Plus-sign number argument
+=====
+[myFunction(+1)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (ERROR
+            (UNEXPECTED '+'))
+          (arguments
+            (number)))))
+
+=====
+Float input
+=====
+[myFunction(1234.5678)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (ERROR
+            (number))
+          (arguments
+              (number)))))
+
+=====
+Float input starting with decimal
+=====
+[myFunction(.1)]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (ERROR)
+          (arguments
+              (number)))))
diff --git a/tree-sitter-dscexpression/corpus/valid_expressions.txt b/tree-sitter-dscexpression/corpus/valid_expressions.txt
index f575990ba..7d8968ca2 100644
--- a/tree-sitter-dscexpression/corpus/valid_expressions.txt
+++ b/tree-sitter-dscexpression/corpus/valid_expressions.txt
@@ -101,3 +101,16 @@ Nested dot-notation
                 (memberName)))))
         (memberAccess
           (memberName))))
+
+=====
+Quotes float input
+=====
+[myFunction('1234.5678')]
+---
+
+    (statement
+      (expression
+        (function
+          (functionName)
+          (arguments
+              (string)))))