diff --git a/src/pandas_profiling/model/summary_algorithms.py b/src/pandas_profiling/model/summary_algorithms.py
index 5be607cb0..6416e9d16 100644
--- a/src/pandas_profiling/model/summary_algorithms.py
+++ b/src/pandas_profiling/model/summary_algorithms.py
@@ -51,7 +51,7 @@ def chi_square(
     values: Optional[np.ndarray] = None, histogram: Optional[np.ndarray] = None
 ) -> dict:
     if histogram is None:
-        bins = bins = np.histogram_bin_edges(values, bins='auto')
+        bins = bins = np.histogram_bin_edges(values, bins="auto")
         histogram, _ = np.histogram(values, bins=bins)
     return dict(chisquare(histogram)._asdict())
 
diff --git a/tests/issues/test_issue915.py b/tests/issues/test_issue915.py
index 15ea33146..6d1703c6b 100644
--- a/tests/issues/test_issue915.py
+++ b/tests/issues/test_issue915.py
@@ -5,9 +5,12 @@
 Error for series with large integers.
 """
 import fnmatch
+
 import pandas as pd
+
 from pandas_profiling import ProfileReport
 
+
 def test_issue915():
     df = pd.DataFrame({"col": pd.Series([716277643516076032 + i for i in range(100)])})
     df_profile = ProfileReport(df)
@@ -27,4 +30,4 @@ def test_with_value(n_extreme_obs):
 
     test_with_value(5)
     test_with_value(100)
-    test_with_value(120)
\ No newline at end of file
+    test_with_value(120)