diff --git a/freqtrade/util/binance_mig.py b/freqtrade/util/binance_mig.py
index 06cd85d1d..366eaa2b7 100644
--- a/freqtrade/util/binance_mig.py
+++ b/freqtrade/util/binance_mig.py
@@ -55,7 +55,7 @@ def migrate_binance_futures_data(config: Config):
         return
 
     from freqtrade.data.history.idatahandler import get_datahandler
-    dhc = get_datahandler(config['datadir'], config['dataformat_ohlcv'])
+    dhc = get_datahandler(config['datadir'], config.get('dataformat_ohlcv', 'json'))
 
     paircombs = dhc.ohlcv_get_available_data(
         config['datadir'],
diff --git a/tests/test_binance_mig.py b/tests/test_binance_mig.py
new file mode 100644
index 000000000..4bc917265
--- /dev/null
+++ b/tests/test_binance_mig.py
@@ -0,0 +1,37 @@
+
+
+import shutil
+from pathlib import Path
+
+from freqtrade.util.binance_mig import migrate_binance_futures_data
+
+
+def test_binance_mig_data_conversion(default_conf_usdt, tmpdir, testdatadir):
+
+    # call doing nothing (spot mode)
+    migrate_binance_futures_data(default_conf_usdt)
+    default_conf_usdt['trading_mode'] = 'futures'
+    pair_old = 'XRP_USDT'
+    pair_unified = 'XRP_USDT_USDT'
+    futures_src = testdatadir / 'futures'
+    futures_dst = tmpdir / 'futures'
+    futures_dst.mkdir()
+    files = [
+        '-1h-mark.json',
+        '-1h-futures.json',
+        '-8h-funding_rate.json',
+        '-8h-mark.json',
+    ]
+
+    # Copy files to tmpdir and rename to old naming
+    for file in files:
+        fn_after = futures_dst / f'{pair_old}{file}'
+        shutil.copy(futures_src / f'{pair_unified}{file}', fn_after)
+
+    default_conf_usdt['datadir'] = Path(tmpdir)
+    # Migrate files to unified namings
+    migrate_binance_futures_data(default_conf_usdt)
+
+    for file in files:
+        fn_after = futures_dst / f'{pair_unified}{file}'
+        assert fn_after.exists()