diff --git a/openbsc/tests/trau/trau_test.c b/openbsc/tests/trau/trau_test.c
new file mode 100644
index 0000000..f8a48db
--- /dev/null
+++ b/openbsc/tests/trau/trau_test.c
@@ -0,0 +1,82 @@
+/* (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <osmocom/abis/trau_frame.h>
+#include <openbsc/trau_mux.h>
+#include <osmocom/core/msgb.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+void test_trau_fr_efr(unsigned char *data)
+{
+	struct decoded_trau_frame tf;
+	struct msgb *msg;
+	struct gsm_data_frame *frame;
+
+	printf("Testing TRAU FR transcoding.\n");
+	data[0] = 0xd0;
+	trau_encode_fr(&tf, data);
+	tf.c_bits[11] = 0; /* clear BFI */
+	msg = trau_decode_fr(1, &tf);
+	OSMO_ASSERT(msg != NULL);
+	frame = (struct gsm_data_frame *)msg->data;
+	OSMO_ASSERT(frame->msg_type == GSM_TCHF_FRAME);
+	OSMO_ASSERT(!memcmp(frame->data, data, 33));
+	msgb_free(msg);
+
+	printf("Testing TRAU EFR transcoding.\n");
+	data[0] = 0xc0;
+	trau_encode_efr(&tf, data);
+	OSMO_ASSERT(tf.d_bits[0] == 1); /* spare bit must be 1 */
+	tf.c_bits[11] = 0; /* clear BFI */
+	msg = trau_decode_efr(1, &tf);
+	OSMO_ASSERT(msg != NULL);
+	frame = (struct gsm_data_frame *)msg->data;
+	OSMO_ASSERT(frame->msg_type == GSM_TCHF_FRAME_EFR);
+	OSMO_ASSERT(!memcmp(frame->data, data, 31));
+
+	printf("Testing TRAU EFR decoding with CRC error.\n");
+	tf.d_bits[0] = 0; /* spare bit must be included */
+	msg = trau_decode_efr(1, &tf);
+	OSMO_ASSERT(msg != NULL);
+	frame = (struct gsm_data_frame *)msg->data;
+	OSMO_ASSERT(frame->msg_type == GSM_TCHF_BAD_FRAME);
+	msgb_free(msg);
+}
+
+int main()
+{
+	unsigned char data[33];
+	int i;
+
+	memset(data, 0x00, sizeof(data));
+	test_trau_fr_efr(data);
+	memset(data, 0xff, sizeof(data));
+	test_trau_fr_efr(data);
+	srandom(42);
+	for (i = 0; i < sizeof(data); i++)
+		data[i] = random();
+	test_trau_fr_efr(data);
+	printf("Done\n");
+	return 0;
+}
+
+/* stubs */
+void vty_out() {}