diff --git a/tests/snippets/stdlib_io_bytesio.py b/tests/snippets/stdlib_io_bytesio.py
index f6f97e684..aa193dc9f 100644
--- a/tests/snippets/stdlib_io_bytesio.py
+++ b/tests/snippets/stdlib_io_bytesio.py
@@ -42,9 +42,21 @@ def test_04():
     assert f.seek(0) == 0
     assert f.read(4) == b'Test'
 
+def test_05():
+    """
+        Tests that the write method accpets bytearray
+    """
+    bytes_string =  b'Test String 5'
+
+    f = BytesIO()
+    f.write(bytearray(bytes_string))
+
+    assert f.getvalue() == bytes_string
+
 if __name__ == "__main__":
     test_01()
     test_02()
     test_03()
     test_04()
+    test_05()
 
diff --git a/vm/src/stdlib/io.rs b/vm/src/stdlib/io.rs
index bee7e1d7f..fb59e0f06 100644
--- a/vm/src/stdlib/io.rs
+++ b/vm/src/stdlib/io.rs
@@ -11,6 +11,7 @@ use num_traits::ToPrimitive;
 use super::os;
 use crate::function::{OptionalArg, OptionalOption, PyFuncArgs};
 use crate::obj::objbytearray::PyByteArray;
+use crate::obj::objbyteinner::PyBytesLike;
 use crate::obj::objbytes;
 use crate::obj::objbytes::PyBytes;
 use crate::obj::objint::{self, PyIntRef};
@@ -173,11 +174,11 @@ impl PyValue for PyBytesIO {
 }
 
 impl PyBytesIORef {
-    fn write(self, data: objbytes::PyBytesRef, vm: &VirtualMachine) -> PyResult {
-        let bytes = data.get_value();
+    fn write(self, data: PyBytesLike, vm: &VirtualMachine) -> PyResult<u64> {
+        let bytes = data.to_cow();
 
-        match self.buffer.borrow_mut().write(bytes) {
-            Some(value) => Ok(vm.ctx.new_int(value)),
+        match self.buffer.borrow_mut().write(&bytes) {
+            Some(value) => Ok(value),
             None => Err(vm.new_type_error("Error Writing Bytes".to_string())),
         }
     }