diff --git a/causalml/metrics/multiqini.py b/causalml/metrics/multiqini.py
index c7891020..ae1bd43c 100644
--- a/causalml/metrics/multiqini.py
+++ b/causalml/metrics/multiqini.py
@@ -5,6 +5,7 @@ def get_mq_ipw_scores(Y, W, W_hat=None):
     """Construct evaluation scores via inverse-propensity weighting.
     See https://github.com/grf-labs/maq/blob/master/python-package/maq/maq.py
     """
+
     return get_ipw_scores(Y, W, W_hat)
 
 
diff --git a/tests/test_metrics.py b/tests/test_metrics.py
index 2b421121..454d4bfe 100644
--- a/tests/test_metrics.py
+++ b/tests/test_metrics.py
@@ -41,4 +41,4 @@ def test_multiqini():
     mq.fit(tau_hat, cost, DR_scores)
 
     #    (0.005729002695991717, 0.019814651108894354)
-    assert isclose(mq.average_gain(spend=0.1)[0],0.005729)
+    assert isclose(mq.average_gain(spend=0.1)[0], 0.005729)