Changed name of test variables

Author: jhendricks487

pandas/tests/frame/methods/test_cov_corr.py

@@ -500,6 +500,6 @@ def test_corr_within_bounds(self):
 
     def test_cov_with_missing_values(self):
         df = DataFrame({"A": [1, 2, None, 4], "B": [2, 4, None, 9]})
-        val1 = df.cov()
-        val2 = df.dropna().cov()
-        tm.assert_frame_equal(val1, val2)
+        expected = DataFrame({"A": [1.0, 1.0], "B": [1.0, 1.0]})
+        result = df.dropna().cov()
+        tm.assert_frame_equal(result, expected)