diff --git a/bigquery/noxfile.py b/bigquery/noxfile.py
index a9df7a67cfcc..9cfe5cc856dd 100644
--- a/bigquery/noxfile.py
+++ b/bigquery/noxfile.py
@@ -38,7 +38,6 @@ def default(session):
     for local_dep in LOCAL_DEPS:
         session.install("-e", local_dep)
 
-    # Pyarrow does not support Python 3.7
     dev_install = ".[all]"
     session.install("-e", dev_install)
 
diff --git a/bigquery/tests/unit/test__pandas_helpers.py b/bigquery/tests/unit/test__pandas_helpers.py
index 13cfab71e74c..9348635f2dc6 100644
--- a/bigquery/tests/unit/test__pandas_helpers.py
+++ b/bigquery/tests/unit/test__pandas_helpers.py
@@ -488,7 +488,10 @@ def test_bq_to_arrow_array_w_special_floats(module_under_test):
     roundtrip = arrow_array.to_pylist()
     assert len(rows) == len(roundtrip)
     assert roundtrip[0] == float("-inf")
-    assert roundtrip[1] != roundtrip[1]  # NaN doesn't equal itself.
+    # Since we are converting from pandas, NaN is treated as NULL in pyarrow
+    # due to pandas conventions.
+    # https://arrow.apache.org/docs/python/data.html#none-values-and-nan-handling
+    assert roundtrip[1] is None
     assert roundtrip[2] == float("inf")
     assert roundtrip[3] is None