diff --git a/test/unit/test_carrier.py b/test/unit/test_carrier.py
index 20eeaf7..00636d0 100644
--- a/test/unit/test_carrier.py
+++ b/test/unit/test_carrier.py
@@ -4,7 +4,7 @@ from pisa import c_logger
 from pisa.carrier import Carrier
 from test.simulator.utils import sha256d
 from test.simulator.transaction import TX
-from test.unit.conftest import generate_blocks, get_random_value_hex
+from test.unit.conftest import generate_blocks, generate_block, get_random_value_hex
 from pisa.rpc_errors import RPC_VERIFY_ALREADY_IN_CHAIN, RPC_DESERIALIZATION_ERROR
 
 c_logger.disabled = True
@@ -72,3 +72,24 @@ def test_get_non_existing_transaction():
     tx_info = Carrier.get_transaction(get_random_value_hex(32))
 
     assert tx_info is None
+
+
+def test_check_tx_in_chain(carrier):
+    # Let's starts by looking for a random transaction
+    random_tx = TX.create_dummy_transaction()
+    random_txid = sha256d(random_tx)
+    tx_in_chain, confirmations = carrier.check_tx_in_chain(random_txid)
+    assert tx_in_chain is False and confirmations is None
+
+    # We can now broadcast the transaction and check again
+    carrier.send_transaction(random_tx, random_txid)
+    tx_in_chain, confirmations = carrier.check_tx_in_chain(random_txid)
+
+    # The tx should be on mempool now, so same
+    assert tx_in_chain is False and confirmations is None
+
+    # Finally we can mine a block and check again
+    generate_block()
+    tx_in_chain, confirmations = carrier.check_tx_in_chain(random_txid)
+
+    assert tx_in_chain is True and confirmations == 1