diff --git a/pandas/io/date_converters.py b/pandas/io/date_converters.py
index 5885a3b9d14d7..99a838c61b996 100644
--- a/pandas/io/date_converters.py
+++ b/pandas/io/date_converters.py
@@ -92,9 +92,7 @@ def generic_parser(parse_func, *cols) -> np.ndarray:
     """
 
     warnings.warn(
-        """
-        Use pd.to_datetime instead.
-""",
+        "Use pd.to_datetime instead.",
         FutureWarning,
         stacklevel=find_stack_level(inspect.currentframe()),
     )
diff --git a/pandas/tests/frame/methods/test_fillna.py b/pandas/tests/frame/methods/test_fillna.py
index 4cf6706707569..3d7e5c6823e9d 100644
--- a/pandas/tests/frame/methods/test_fillna.py
+++ b/pandas/tests/frame/methods/test_fillna.py
@@ -777,6 +777,6 @@ def test_fillna_nonconsolidated_frame():
         ],
         columns=["i1", "i2", "i3", "f1"],
     )
-    df_nonconsol = df.pivot("i1", "i2")
+    df_nonconsol = df.pivot(index="i1", columns="i2")
     result = df_nonconsol.fillna(0)
     assert result.isna().sum().sum() == 0
diff --git a/pandas/tests/plotting/frame/test_frame.py b/pandas/tests/plotting/frame/test_frame.py
index f804f7df06bb8..b64af2dd98bcb 100644
--- a/pandas/tests/plotting/frame/test_frame.py
+++ b/pandas/tests/plotting/frame/test_frame.py
@@ -70,7 +70,8 @@ def test_plot(self):
 
         ax = _check_plot_works(df.plot, use_index=True)
         self._check_ticks_props(ax, xrot=0)
-        _check_plot_works(df.plot, sort_columns=False)
+        with tm.assert_produces_warning(FutureWarning, check_stacklevel=False):
+            _check_plot_works(df.plot, sort_columns=False)
         _check_plot_works(df.plot, yticks=[1, 5, 10])
         _check_plot_works(df.plot, xticks=[1, 5, 10])
         _check_plot_works(df.plot, ylim=(-100, 100), xlim=(-100, 100))