diff --git a/vm/src/obj/objbytearray.rs b/vm/src/obj/objbytearray.rs
index bfead7864f..1c7d523162 100644
--- a/vm/src/obj/objbytearray.rs
+++ b/vm/src/obj/objbytearray.rs
@@ -300,17 +300,9 @@ impl PyByteArray {
     }
 
     #[pymethod(name = "endswith")]
-    fn endswith(
-        &self,
-        suffix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
-        vm: &VirtualMachine,
-    ) -> PyResult<bool> {
+    fn endswith(&self, options: pystr::StartsEndsWithArgs, vm: &VirtualMachine) -> PyResult<bool> {
         self.borrow_value().elements[..].py_startsendswith(
-            suffix,
-            start,
-            end,
+            options,
             "endswith",
             "bytes",
             |s, x: &PyByteInner| s.ends_with(&x.elements[..]),
@@ -321,15 +313,11 @@ impl PyByteArray {
     #[pymethod(name = "startswith")]
     fn startswith(
         &self,
-        prefix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
+        options: pystr::StartsEndsWithArgs,
         vm: &VirtualMachine,
     ) -> PyResult<bool> {
         self.borrow_value().elements[..].py_startsendswith(
-            prefix,
-            start,
-            end,
+            options,
             "startswith",
             "bytes",
             |s, x: &PyByteInner| s.starts_with(&x.elements[..]),
diff --git a/vm/src/obj/objbytes.rs b/vm/src/obj/objbytes.rs
index cca75d6123..83a26d557d 100644
--- a/vm/src/obj/objbytes.rs
+++ b/vm/src/obj/objbytes.rs
@@ -273,17 +273,9 @@ impl PyBytes {
     }
 
     #[pymethod(name = "endswith")]
-    fn endswith(
-        &self,
-        suffix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
-        vm: &VirtualMachine,
-    ) -> PyResult<bool> {
+    fn endswith(&self, options: pystr::StartsEndsWithArgs, vm: &VirtualMachine) -> PyResult<bool> {
         self.inner.elements[..].py_startsendswith(
-            suffix,
-            start,
-            end,
+            options,
             "endswith",
             "bytes",
             |s, x: &PyByteInner| s.ends_with(&x.elements[..]),
@@ -294,15 +286,11 @@ impl PyBytes {
     #[pymethod(name = "startswith")]
     fn startswith(
         &self,
-        prefix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
+        options: pystr::StartsEndsWithArgs,
         vm: &VirtualMachine,
     ) -> PyResult<bool> {
         self.inner.elements[..].py_startsendswith(
-            prefix,
-            start,
-            end,
+            options,
             "startswith",
             "bytes",
             |s, x: &PyByteInner| s.starts_with(&x.elements[..]),
diff --git a/vm/src/obj/objstr.rs b/vm/src/obj/objstr.rs
index 9638838bfd..9366737972 100644
--- a/vm/src/obj/objstr.rs
+++ b/vm/src/obj/objstr.rs
@@ -507,17 +507,9 @@ impl PyString {
     }
 
     #[pymethod]
-    fn endswith(
-        &self,
-        suffix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
-        vm: &VirtualMachine,
-    ) -> PyResult<bool> {
+    fn endswith(&self, args: pystr::StartsEndsWithArgs, vm: &VirtualMachine) -> PyResult<bool> {
         self.value.as_str().py_startsendswith(
-            suffix,
-            start,
-            end,
+            args,
             "endswith",
             "str",
             |s, x: &PyStringRef| s.ends_with(x.as_str()),
@@ -526,17 +518,9 @@ impl PyString {
     }
 
     #[pymethod]
-    fn startswith(
-        &self,
-        prefix: PyObjectRef,
-        start: OptionalArg<Option<isize>>,
-        end: OptionalArg<Option<isize>>,
-        vm: &VirtualMachine,
-    ) -> PyResult<bool> {
+    fn startswith(&self, args: pystr::StartsEndsWithArgs, vm: &VirtualMachine) -> PyResult<bool> {
         self.value.as_str().py_startsendswith(
-            prefix,
-            start,
-            end,
+            args,
             "startswith",
             "str",
             |s, x: &PyStringRef| s.starts_with(x.as_str()),
diff --git a/vm/src/obj/pystr.rs b/vm/src/obj/pystr.rs
index 7af1d93832..c0c0d113e2 100644
--- a/vm/src/obj/pystr.rs
+++ b/vm/src/obj/pystr.rs
@@ -54,6 +54,23 @@ impl ExpandTabsArgs {
     }
 }
 
+#[derive(FromArgs)]
+pub struct StartsEndsWithArgs {
+    #[pyarg(positional_only, optional = false)]
+    affix: PyObjectRef,
+    #[pyarg(positional_only, optional = true)]
+    start: OptionalOption<isize>,
+    #[pyarg(positional_only, optional = true)]
+    end: OptionalOption<isize>,
+}
+
+impl StartsEndsWithArgs {
+    fn get_value(self, len: usize) -> (PyObjectRef, std::ops::Range<usize>) {
+        let range = adjust_indices(self.start, self.end, len);
+        (self.affix, range)
+    }
+}
+
 // help get optional string indices
 pub fn adjust_indices(
     start: OptionalOption<isize>,
@@ -134,13 +151,10 @@ pub trait PyCommonString<E> {
     where
         F: Fn(&Self) -> PyObjectRef;
 
-    #[allow(clippy::too_many_arguments)]
     #[inline]
     fn py_startsendswith<T, F>(
         &self,
-        affix: PyObjectRef,
-        start: OptionalOption<isize>,
-        end: OptionalOption<isize>,
+        args: StartsEndsWithArgs,
         func_name: &str,
         py_type_name: &str,
         func: F,
@@ -150,7 +164,7 @@ pub trait PyCommonString<E> {
         T: TryFromObject,
         F: Fn(&Self, &T) -> bool,
     {
-        let range = adjust_indices(start, end, self.len());
+        let (affix, range) = args.get_value(self.len());
         if range.is_normal() {
             let value = self.get_slice(range);
             single_or_tuple_any(