--- a/src/flags.rs
+++ b/src/flags.rs
@@ -69,9 +69,6 @@ bitflags! {
         /// `?`
         const SYNTAX_OPERATOR_QMARK_ZERO_ONE
             = (onig_sys::ONIG_SYN_OP_QMARK_ZERO_ONE as u64);
-    /// ?P
-    const SYNTAX_OPERATOR_QMARK_CAPITAL_P_NAME
-        = (onig_sys::ONIG_SYN_OP2_QMARK_CAPITAL_P_NAME as u64);
         /// `{lower,upper}`
         const SYNTAX_OPERATOR_BRACE_INTERVAL
             = (onig_sys::ONIG_SYN_OP_BRACE_INTERVAL as u64);
--- a/src/syntax.rs
+++ b/src/syntax.rs
@@ -33,10 +33,6 @@ pub struct Syntax {
 }
 
 impl Syntax {
-    /// Python syntax
-    pub fn python() -> &'static Syntax {
-        unsafe { transmute(&onig_sys::OnigSyntaxPython) }
-    }
     /// Plain text syntax
     pub fn asis() -> &'static Syntax {
         unsafe { transmute(&onig_sys::OnigSyntaxASIS) }
@@ -206,17 +202,3 @@ impl Syntax {
         &self.raw as *const onig_sys::OnigSyntaxType as *mut onig_sys::OnigSyntaxType
     }
 }
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    #[test]
-    fn round_trip_bits() {
-        let mut syn = Syntax::python().clone();
-        syn.enable_operators(SyntaxOperator::SYNTAX_OPERATOR_ESC_X_BRACE_HEX8);
-        assert_ne!(Syntax::python().raw, syn.raw);
-        syn.disable_operators(SyntaxOperator::SYNTAX_OPERATOR_ESC_X_BRACE_HEX8);
-        assert_eq!(Syntax::python().raw, syn.raw);
-    }
-}