diff --git a/tests/conftest.py b/tests/conftest.py
index 4192dc1cc..e3c0cf070 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1020,6 +1020,7 @@ def limit_buy_order_open():
         'side': 'buy',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().int_timestamp,
+        'datetime': arrow.utcnow().isoformat(),
         'price': 0.00001099,
         'amount': 90.99181073,
         'filled': 0.0,
@@ -1046,6 +1047,7 @@ def market_buy_order():
         'side': 'buy',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().int_timestamp,
+        'datetime': arrow.utcnow().isoformat(),
         'price': 0.00004099,
         'amount': 91.99181073,
         'filled': 91.99181073,
@@ -1062,6 +1064,7 @@ def market_sell_order():
         'side': 'sell',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().int_timestamp,
+        'datetime': arrow.utcnow().isoformat(),
         'price': 0.00004173,
         'amount': 91.99181073,
         'filled': 91.99181073,
@@ -1077,6 +1080,7 @@ def limit_buy_order_old():
         'type': 'limit',
         'side': 'buy',
         'symbol': 'mocked',
+        'datetime': arrow.utcnow().shift(minutes=-601).isoformat(),
         'timestamp': arrow.utcnow().shift(minutes=-601).int_timestamp,
         'price': 0.00001099,
         'amount': 90.99181073,
@@ -1094,6 +1098,7 @@ def limit_sell_order_old():
         'side': 'sell',
         'symbol': 'ETH/BTC',
         'timestamp': arrow.utcnow().shift(minutes=-601).int_timestamp,
+        'datetime': arrow.utcnow().shift(minutes=-601).isoformat(),
         'price': 0.00001099,
         'amount': 90.99181073,
         'filled': 0.0,
@@ -1110,6 +1115,7 @@ def limit_buy_order_old_partial():
         'side': 'buy',
         'symbol': 'ETH/BTC',
         'timestamp': arrow.utcnow().shift(minutes=-601).int_timestamp,
+        'datetime': arrow.utcnow().shift(minutes=-601).isoformat(),
         'price': 0.00001099,
         'amount': 90.99181073,
         'filled': 23.0,
@@ -1389,6 +1395,7 @@ def tickers():
         'BLK/BTC': {
             'symbol': 'BLK/BTC',
             'timestamp': 1522014806072,
+            'datetime': '2018-03-25T21:53:26.072Z',
             'high': 0.007745,
             'low': 0.007512,
             'bid': 0.007729,
@@ -1867,6 +1874,7 @@ def buy_order_fee():
         'side': 'buy',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().shift(minutes=-601).int_timestamp,
+        'datetime': arrow.utcnow().shift(minutes=-601).isoformat(),
         'price': 0.245441,
         'amount': 8.0,
         'cost': 1.963528,
@@ -2217,6 +2225,7 @@ def market_buy_order_usdt():
         'side': 'buy',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().int_timestamp,
+        'datetime': arrow.utcnow().isoformat(),
         'price': 2.00,
         'amount': 30.0,
         'filled': 30.0,
@@ -2271,6 +2280,7 @@ def market_sell_order_usdt():
         'side': 'sell',
         'symbol': 'mocked',
         'timestamp': arrow.utcnow().int_timestamp,
+        'datetime': arrow.utcnow().isoformat(),
         'price': 2.20,
         'amount': 30.0,
         'filled': 30.0,