diff --git a/tests/bsim/bluetooth/mesh/prj_mesh1d1.conf b/tests/bsim/bluetooth/mesh/prj_mesh1d1.conf
index 15df7b8a5d37322..994af8bfb7e0a44 100644
--- a/tests/bsim/bluetooth/mesh/prj_mesh1d1.conf
+++ b/tests/bsim/bluetooth/mesh/prj_mesh1d1.conf
@@ -25,6 +25,7 @@ CONFIG_BT_MESH_TX_SEG_MAX=32
 CONFIG_BT_MESH_RX_SEG_MAX=32
 CONFIG_BT_MESH_TX_SEG_MSG_COUNT=10
 CONFIG_BT_MESH_RX_SEG_MSG_COUNT=10
+CONFIG_BT_MESH_SEG_BUFS=100
 CONFIG_BT_MESH_CFG_CLI=y
 CONFIG_BT_MESH_MODEL_GROUP_COUNT=3
 CONFIG_BT_MESH_LOW_POWER=y
diff --git a/tests/bsim/bluetooth/mesh/src/test_op_agg.c b/tests/bsim/bluetooth/mesh/src/test_op_agg.c
index 85bc1a6ba26013f..d8bb50b3fd39b04 100644
--- a/tests/bsim/bluetooth/mesh/src/test_op_agg.c
+++ b/tests/bsim/bluetooth/mesh/src/test_op_agg.c
@@ -257,6 +257,23 @@ static void test_dut_model_coex(void)
 	PASS();
 }
 
+static void test_dut_model_coex_loopback(void)
+{
+	/* Start an aggregated sequence */
+	common_init(SRV_ADDR, SRV_ADDR, true);
+
+	/* Send aggregated sequence to server model over loopback */
+	ASSERT_OK(bt_mesh_op_agg_cli_seq_send());
+
+	/* Confirm incoming sequence messages */
+	confirm_agg_seq();
+
+	/* Confirm status messages for sequence */
+	confirm_agg_status();
+
+	PASS();
+}
+
 #define TEST_CASE(role, name, description)         \
 	{                                              \
 		.test_id = "op_agg_" #role "_" #name,      \
@@ -273,6 +290,7 @@ static const struct bst_test_instance test_op_agg[] = {
 	TEST_CASE(srv, max_len_status_msg_send,
 		  "OpAggSrv will respond with a 380 Byte status message. "),
 	TEST_CASE(dut, model_coex, "DUT: Coexistence of OpAggSrv and OpAggCli."),
+	TEST_CASE(dut, model_coex_loopback, "DUT: Coexistence for OpAggSrv and OpAggCli loopback."),
 
 	BSTEST_END_MARKER};
 
diff --git a/tests/bsim/bluetooth/mesh/tests_scripts/op_agg/loopback.sh b/tests/bsim/bluetooth/mesh/tests_scripts/op_agg/loopback.sh
new file mode 100755
index 000000000000000..3a4720bdaf4dd81
--- /dev/null
+++ b/tests/bsim/bluetooth/mesh/tests_scripts/op_agg/loopback.sh
@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# Copyright 2023 Nordic Semiconductor
+# SPDX-License-Identifier: Apache-2.0
+
+source $(dirname "${BASH_SOURCE[0]}")/../../_mesh_test.sh
+
+# Test that an Opcode aggregated message can be sent and received on loopback.
+#
+# Test procedure:
+# 1. The device initializes both Opcode aggregator server and client.
+#    The device starts an Opcode aggregator sequence and populates the buffer.
+# 2. The device starts sending the sequence on loopback.
+# 3. The device verifies that the sequence is correctly received by the server model.
+# 4. The device confirms that the client model received all status messages.
+conf=prj_mesh1d1_conf
+RunTest mesh_op_agg_model_coex_loopback \
+	op_agg_dut_model_coex_loopback
+
+conf=prj_mesh1d1_conf
+overlay=overlay_psa_conf
+RunTest mesh_op_agg_model_coex_loopback \
+	op_agg_dut_model_coex_loopback