diff --git a/rstest_macros/src/error.rs b/rstest_macros/src/error.rs
index a38eac3..bc521d3 100644
--- a/rstest_macros/src/error.rs
+++ b/rstest_macros/src/error.rs
@@ -32,7 +32,7 @@ pub(crate) fn fixture(test: &ItemFn, info: &FixtureInfo) -> TokenStream {
 }
 
 fn async_once<'a>(test: &'a ItemFn, info: &FixtureInfo) -> Errors<'a> {
-    match (test.sig.asyncness, info.attributes.get_once()) {
+    match (test.sig.asyncness, info.arguments.get_once()) {
         (Some(_asyncness), Some(once)) => Box::new(std::iter::once(syn::Error::new(
             once.span(),
             "Cannot apply #[once] to async fixture.",
@@ -69,7 +69,7 @@ fn has_some_generics(test: &ItemFn) -> bool {
 }
 
 fn generics_once<'a>(test: &'a ItemFn, info: &FixtureInfo) -> Errors<'a> {
-    match (has_some_generics(test), info.attributes.get_once()) {
+    match (has_some_generics(test), info.arguments.get_once()) {
         (true, Some(once)) => Box::new(std::iter::once(syn::Error::new(
             once.span(),
             "Cannot apply #[once] on generic fixture.",
diff --git a/rstest_macros/src/parse/fixture.rs b/rstest_macros/src/parse/fixture.rs
index 07e3a8a..5b8dd69 100644
--- a/rstest_macros/src/parse/fixture.rs
+++ b/rstest_macros/src/parse/fixture.rs
@@ -11,12 +11,7 @@ use super::{
     extract_defaults, extract_fixtures, extract_partials_return_type, future::extract_futures,
     parse_vector_trailing_till_double_comma, Attributes, ExtendWithFunctionAttrs, Fixture,
 };
-use crate::{
-    error::ErrorsVec,
-    parse::extract_once,
-    refident::{MaybeIdent, RefIdent},
-    utils::attr_is,
-};
+use crate::{error::ErrorsVec, parse::extract_once, refident::RefIdent, utils::attr_is};
 use crate::{parse::Attribute, utils::attr_in};
 use proc_macro2::TokenStream;
 use quote::{format_ident, ToTokens};
@@ -83,9 +78,7 @@ impl ExtendWithFunctionAttrs for FixtureInfo {
         for (id, return_type) in partials_return_type {
             self.attributes.set_partial_return_type(id, return_type);
         }
-        if let Some(ident) = once {
-            self.attributes.set_once(ident)
-        };
+        self.arguments.set_once(once);
         let (futures, global_awt) = futures;
         self.arguments.set_global_await(global_awt);
         self.arguments.set_futures(futures.into_iter());
@@ -300,20 +293,6 @@ impl FixtureModifiers {
         ))
     }
 
-    pub(crate) fn set_once(&mut self, once: syn::Ident) {
-        self.inner.attributes.push(Attribute::Attr(once))
-    }
-
-    pub(crate) fn get_once(&self) -> Option<&Ident> {
-        self.iter()
-            .find(|&a| a == &Attribute::Attr(format_ident!("once")))
-            .and_then(|a| a.maybe_ident())
-    }
-
-    pub(crate) fn is_once(&self) -> bool {
-        self.get_once().is_some()
-    }
-
     fn extract_type(&self, attr_name: &str) -> Option<syn::ReturnType> {
         self.iter()
             .filter_map(|m| match m {
@@ -579,7 +558,7 @@ mod extend {
 
             info.extend_with_function_attrs(&mut item_fn).unwrap();
 
-            assert!(info.attributes.is_once());
+            assert!(info.arguments.is_once());
         }
 
         #[test]
@@ -593,7 +572,7 @@ mod extend {
 
             info.extend_with_function_attrs(&mut item_fn).unwrap();
 
-            assert!(!info.attributes.is_once());
+            assert!(!info.arguments.is_once());
         }
 
         #[rstest]
diff --git a/rstest_macros/src/parse/mod.rs b/rstest_macros/src/parse/mod.rs
index 60ef4c6..2d0c687 100644
--- a/rstest_macros/src/parse/mod.rs
+++ b/rstest_macros/src/parse/mod.rs
@@ -674,6 +674,7 @@ pub(crate) mod arguments {
     pub(crate) struct ArgumentsInfo {
         args: HashMap<Ident, ArgumentInfo>,
         is_global_await: bool,
+        once: Option<Ident>
     }
 
     impl ArgumentsInfo {
@@ -714,6 +715,18 @@ pub(crate) mod arguments {
         pub(crate) fn is_global_await(&self) -> bool {
             self.is_global_await
         }
+
+        pub(crate) fn set_once(&mut self, once: Option<Ident>) {
+            self.once = once
+        }
+
+        pub(crate) fn get_once(&self) -> Option<&Ident> {
+            self.once.as_ref()
+        }
+
+        pub(crate) fn is_once(&self) -> bool {
+            self.get_once().is_some()
+        }
     }
 
     #[cfg(test)]
diff --git a/rstest_macros/src/render/fixture.rs b/rstest_macros/src/render/fixture.rs
index 2ef5227..c528dcb 100644
--- a/rstest_macros/src/render/fixture.rs
+++ b/rstest_macros/src/render/fixture.rs
@@ -69,7 +69,7 @@ pub(crate) fn render(mut fixture: ItemFn, info: FixtureInfo) -> TokenStream {
     let call_get = render_exec_call(parse_quote! { Self::get }, args, asyncness.is_some());
     let mut call_impl = render_exec_call(parse_quote! { #name }, args, asyncness.is_some());
 
-    if info.attributes.is_once() {
+    if info.arguments.is_once() {
         call_impl = wrap_call_impl_with_call_once_impl(call_impl, &output);
         output = wrap_return_type_as_static_ref(output);
         default_output = wrap_return_type_as_static_ref(default_output);
@@ -110,7 +110,7 @@ fn render_partial_impl(
         .extract_partial_type(n)
         .unwrap_or_else(|| fixture.sig.output.clone());
 
-    if info.attributes.is_once() {
+    if info.arguments.is_once() {
         output = wrap_return_type_as_static_ref(output);
     }
 
diff --git a/rstest_macros/src/test.rs b/rstest_macros/src/test.rs
index cd12d95..d540251 100644
--- a/rstest_macros/src/test.rs
+++ b/rstest_macros/src/test.rs
@@ -307,14 +307,7 @@ impl<T: ToTokens> DisplayCode for T {
 
 impl crate::parse::fixture::FixtureInfo {
     pub(crate) fn with_once(mut self) -> Self {
-        self.attributes = self.attributes.with_once();
-        self
-    }
-}
-
-impl crate::parse::fixture::FixtureModifiers {
-    pub(crate) fn with_once(mut self) -> Self {
-        self.append(Attribute::attr("once"));
+        self.arguments.set_once(Some(ident("once")));
         self
     }
 }