fix tests

pandas/core/generic.py

@@ -3418,7 +3418,11 @@ def to_latex(
             }
 
             return self._to_latex_via_styler(
-                buf, hide=hide, format=format, render_kwargs=render_kwargs
+                buf,
+                hide=hide,
+                format=format,
+                format_index=[{"axis": 0, **format_}, {"axis": 1, **format_}],
+                render_kwargs=render_kwargs,
             )
 
     def _to_latex_via_styler(

pandas/tests/io/formats/test_to_latex.py

@@ -487,7 +487,6 @@ def test_to_latex_label_only(self, df_short, label_table):
         expected = _dedent(
             r"""
             \begin{table}
-            \centering
             \label{tab:table_tabular}
             \begin{tabular}{lrl}
             \toprule
@@ -1352,14 +1351,14 @@ def test_to_latex_multiindex_nans(self, one_row):
             r"""
             \begin{tabular}{llr}
             \toprule
-                &   &  c \\
-            a & b &    \\
+             &  & c \\
+            a & b &  \\
             \midrule
-            NaN & 2 &  4 \\
+            NaN & 2 & 4 \\
             """
         )
         if not one_row:
-            expected += r"""1.0 & 3 &  5 \\
+            expected += r"""1.000000 & 3 & 5 \\
 """
         expected += r"""\bottomrule
 \end{tabular}