Update test_algos.py

Author: gabrielvf1

pandas/tests/test_algos.py

@@ -2388,7 +2388,7 @@ def test_isin_int_df_string_search(self):
     def test_isin_nan_df_string_search(self):
         """Comparing df with nan value (np.nan,2) with a string at isin() ("NaN")
         -> should not match values because np.nan is not equal str NaN """
-        df = DataFrame({"values": [np.nan, 2]})
+        df = pd.DataFrame({"values": [np.nan, 2]})
         result = df.isin(["NaN"])
         expected_false = pd.DataFrame({"values": [False, False]})
         tm.assert_frame_equal(result, expected_false)
@@ -2397,7 +2397,7 @@ def test_isin_nan_df_string_search(self):
     def test_isin_float_df_string_search(self):
         """Comparing df with floats (1.4245,2.32441) with a string at isin() ("1.4245")
         -> should not match values because float 1.4245 is not equal str 1.4245"""
-        df = DataFrame({"values": [1.4245, 2.32441]})
+        df = pd.DataFrame({"values": [1.4245, 2.32441]})
         result = df.isin(["1.4245"])
         expected_false = pd.DataFrame({"values": [False, False]})
         tm.assert_frame_equal(result, expected_false)