diff --git a/handler/tests/test_transactions.py b/handler/tests/test_transactions.py
new file mode 100644
index 0000000..67def66
--- /dev/null
+++ b/handler/tests/test_transactions.py
@@ -0,0 +1,198 @@
+from unittest import TestCase
+from unittest.mock import MagicMock
+from copy import deepcopy
+
+import transactions
+
+
+class TestTransactions(TestCase):
+    def setUp(self):
+        self.transactions = transactions.Transactions()
+        self.test_data = {
+            "event": "TransactionCreated",
+            "timestamp": "2022-02-24T20:26:15.232342Z",
+            "data": {
+                "id": "6217e9e7-43e1-a809-8500-0a5b0170e6e4",
+                "type": "transfer",
+                "state": "completed",
+                "request_id": "8a15213e-a7d2-4738-bfb5-b1d037b75a57",
+                "created_at": "2022-02-24T20:26:15.238218Z",
+                "updated_at": "2022-02-24T20:26:15.238218Z",
+                "completed_at": "2022-02-24T20:26:15.238453Z",
+                "reference": "TEST-1",
+                "legs": [
+                    {
+                        "leg_id": "80b35daf-409c-41be-8755-15982b7633a6",
+                        "account_id": "7185593b-d9ad-4456-920e-d9db109a5172",
+                        "counterparty": {"account_type": "revolut"},
+                        "amount": 1,
+                        "currency": "GBP",
+                        "description": "From Mark Veidemanis",
+                        "balance": 3832.3,
+                    }
+                ],
+            },
+        }
+
+        # Mock redis calls
+        transactions.r.hgetall = self.mock_hgetall
+        transactions.r.hmset = self.mock_hmset
+        transactions.r.keys = self.mock_keys
+        transactions.r.get = self.mock_get
+
+        self.transactions.irc = MagicMock()
+        self.transactions.irc.sendmsg = MagicMock()
+        self.transactions.release_funds = MagicMock()
+        self.transactions.notify = MagicMock()
+        self.transactions.notify.notify_complete_trade = MagicMock()
+
+        self.trade_1 = {
+            "id": "uuid1",
+            "buyer": "test_buyer_1",
+            "currency": "GBP",
+            "amount": "1",
+            "amount_xmr": "0.3",
+            "reference": "TEST-1",
+        }
+
+        self.trade_2 = {
+            "id": "uuid2",
+            "buyer": "test_buyer_2",
+            "currency": "GBP",
+            "amount": "1",
+            "amount_xmr": "0.3",
+            "reference": "TEST-2",
+        }
+
+    @property
+    def test_data_copy(self):
+        return deepcopy(self.test_data)
+
+    def mock_hgetall(self, string):
+        if string == "trade.TEST-1":
+            return self.trade_1
+        elif string == "trade.TEST-2":
+            return self.trade_2
+
+    def mock_hmset(self, string, data):
+        print("HMSET", string, data)
+
+    def mock_keys(self, string):
+        return ["uuid1", "uuid2"]
+
+    def mock_get(self, string):
+        if string == "uuid1":
+            return "TEST-1"
+        elif string == "uuid2":
+            return "TEST-2"
+
+    def test_transaction(self):
+        self.transactions.transaction(self.test_data)
+        self.transactions.release_funds.assert_called_once_with("uuid1", "TEST-1")
+
+        self.transactions.release_funds = MagicMock()
+        ref_2 = self.test_data_copy
+        ref_2["data"]["reference"] = "TEST-2"
+        self.transactions.transaction(ref_2)
+        self.transactions.release_funds.assert_called_once_with("uuid2", "TEST-2")
+
+    def test_transaction_invalid(self):
+        invalid_data = self.test_data_copy
+        invalid_data["data"]["reference"] = "sss"
+        invalid_data["data"]["amount"] = 2000
+        invalid_data["data"]["currency"] = "SEK"
+        self.transactions.transaction(invalid_data)
+        self.transactions.release_funds.assert_not_called()
+
+    def test_transaction_malformed(self):
+        pass
+
+    def test_transaction_no_reference_fail(self):
+        pass
+
+    def test_transaction_no_reference_pass(self):
+        pass
+
+    def test_transaction_no_reference_exceeds_max(self):
+        pass
+
+    def test_transaction_wrong_currency(self):
+        pass
+
+    def test_transaction_wrong_amount(self):
+        pass
+
+    def test_transaction_pending(self):
+        pass
+
+    def test_transaction_too_low(self):
+        pass
+
+    def test_transaction_too_high(self):
+        pass
+
+    # def test_transaction_pending_then_completed(self):
+    #    pass
+
+    def test_transaction_store_incomplete_trade(self):
+        pass
+
+    def test_transaction_release_incomplete_trade(self):
+        pass
+
+    def test_transaction_card_payment(self):
+        pass
+
+    def test_transaction_negative_amount(self):
+        pass
+
+    def test_release_funds(self):
+        pass
+
+    def test_new_trade(self):
+        pass
+
+    def test_find_trade(self):
+        pass
+
+    def test_get_refs(self):
+        pass
+
+    def test_get_ref_map(self):
+        pass
+
+    def test_get_ref(self):
+        pass
+
+    def test_del_ref(self):
+        pass
+
+    def test_cleanup(self):
+        pass
+
+    def test_tx_to_ref(self):
+        pass
+
+    def test_ref_to_tx(self):
+        pass
+
+    def test_get_total_usd(self):
+        pass
+
+    def test_get_total(self):
+        pass
+
+    def test_write_to_es(self):
+        pass
+
+    def test_get_remaining(self):
+        pass
+
+    def test_get_open_trades_usd(self):
+        pass
+
+    def test_get_total_remaining(self):
+        pass
+
+    def get_total_with_trades(self):
+        pass