diff --git a/tests/snippets/bytearray.py b/tests/snippets/bytearray.py
index 4cf8e608c..889c34056 100644
--- a/tests/snippets/bytearray.py
+++ b/tests/snippets/bytearray.py
@@ -271,6 +271,9 @@ assert bytearray(b"").join(
 ) == bytearray(b"jiljlkmoomkaaaa")
 with assert_raises(TypeError):
     bytearray(b"").join((b"km", "kl"))
+assert bytearray(b"abc").join((
+    bytearray(b"123"), bytearray(b"xyz")
+)) == bytearray(b"123abcxyz")
 
 
 # endswith startswith
diff --git a/tests/snippets/bytes.py b/tests/snippets/bytes.py
index 33774fe2c..69a8f8e9f 100644
--- a/tests/snippets/bytes.py
+++ b/tests/snippets/bytes.py
@@ -270,6 +270,8 @@ assert (
 with assert_raises(TypeError):
     b"".join((b"km", "kl"))
 
+assert b"abc".join((b"123", b"xyz")) == b"123abcxyz"
+
 
 # endswith startswith
 assert b"abcde".endswith(b"de")
diff --git a/vm/src/obj/objbytearray.rs b/vm/src/obj/objbytearray.rs
index 0597863e7..9e4936c88 100644
--- a/vm/src/obj/objbytearray.rs
+++ b/vm/src/obj/objbytearray.rs
@@ -290,7 +290,7 @@ impl PyByteArrayRef {
     }
 
     #[pymethod(name = "join")]
-    fn join(self, iter: PyIterable, vm: &VirtualMachine) -> PyResult {
+    fn join(self, iter: PyIterable<PyByteInner>, vm: &VirtualMachine) -> PyResult {
         self.inner.borrow().join(iter, vm)
     }
 
diff --git a/vm/src/obj/objbyteinner.rs b/vm/src/obj/objbyteinner.rs
index 09db11ed5..983e8a4ed 100644
--- a/vm/src/obj/objbyteinner.rs
+++ b/vm/src/obj/objbyteinner.rs
@@ -826,11 +826,14 @@ impl PyByteInner {
         Ok(total)
     }
 
-    pub fn join(&self, iter: PyIterable, vm: &VirtualMachine) -> PyResult {
+    pub fn join(&self, iter: PyIterable<PyByteInner>, vm: &VirtualMachine) -> PyResult {
         let mut refs = vec![];
         for v in iter.iter(vm)? {
             let v = v?;
-            refs.extend(PyByteInner::try_from_object(vm, v)?.elements)
+            if !refs.is_empty() {
+                refs.extend(&self.elements);
+            }
+            refs.extend(v.elements);
         }
 
         Ok(vm.ctx.new_bytes(refs))
diff --git a/vm/src/obj/objbytes.rs b/vm/src/obj/objbytes.rs
index 61a1595f7..2e2a0d6db 100644
--- a/vm/src/obj/objbytes.rs
+++ b/vm/src/obj/objbytes.rs
@@ -263,7 +263,7 @@ impl PyBytesRef {
     }
 
     #[pymethod(name = "join")]
-    fn join(self, iter: PyIterable, vm: &VirtualMachine) -> PyResult {
+    fn join(self, iter: PyIterable<PyByteInner>, vm: &VirtualMachine) -> PyResult {
         self.inner.join(iter, vm)
     }