diff --git a/forestplot/mplot_graph_utils.py b/forestplot/mplot_graph_utils.py
index a10bdd3..edd381a 100644
--- a/forestplot/mplot_graph_utils.py
+++ b/forestplot/mplot_graph_utils.py
@@ -50,18 +50,37 @@ def mdraw_ref_xline(
     return ax
 
 
-# =============================================================================================
-# =============================================================================================
-# =============================================================================================
 def mdraw_yticklabels(
     dataframe: pd.core.frame.DataFrame,
     yticklabel: str,
-    model_col: str,
-    models: Optional[Union[Sequence[str], None]],
     flush: bool,
     ax: Axes,
     **kwargs: Any,
 ) -> Axes:
+    """
+    Set custom y-axis tick labels on a matplotlib Axes object using the yticklabel column in the provided
+    pandas dataframe.
+
+    Parameters
+    ----------
+    dataframe : pd.core.frame.DataFrame
+        The pandas DataFrame from which the y-axis tick labels are derived.
+    yticklabel : str
+        Column name in the DataFrame whose values are used as y-axis tick labels.
+    flush : bool
+        If True, aligns y-axis tick labels to the left with adjusted padding to prevent overlap.
+        If False, aligns labels to the right.
+    ax : Axes
+        The matplotlib Axes object to be modified.
+    **kwargs : Any
+        Additional keyword arguments for customizing the appearance of the tick labels.
+        Supported customizations include 'fontfamily' (default 'monospace') and 'fontsize' (default 12).
+
+    Returns
+    -------
+    Axes
+        The modified matplotlib Axes object with updated y-axis tick labels.
+    """
     ax.set_yticks(range(len(dataframe)))
 
     fontfamily = kwargs.get("fontfamily", "monospace")
@@ -72,10 +91,16 @@ def mdraw_yticklabels(
         )
         yax = ax.get_yaxis()
         fig = plt.gcf()
-        pad = max(
-            T.label.get_window_extent(renderer=fig.canvas.get_renderer()).width
-            for T in yax.majorTicks
-        )
+        try:
+            pad = max(
+                T.label.get_window_extent(renderer=fig.canvas.get_renderer()).width
+                for T in yax.majorTicks
+            )
+        except AttributeError:
+            pad = max(
+                T.label1.get_window_extent(renderer=fig.canvas.get_renderer()).width
+                for T in yax.majorTicks
+            )
         yax.set_tick_params(pad=pad)
     else:
         ax.set_yticklabels(
diff --git a/tests/test_mplot_graph_utils.py b/tests/test_mplot_graph_utils.py
new file mode 100644
index 0000000..bcc5e9b
--- /dev/null
+++ b/tests/test_mplot_graph_utils.py
@@ -0,0 +1,52 @@
+import matplotlib.pyplot as plt
+import pandas as pd
+from matplotlib.pyplot import Axes
+
+from forestplot.mplot_graph_utils import mdraw_ref_xline, mdraw_yticklabels
+
+x, y = [0, 1, 2], [0, 1, 2]
+str_vector = ["a", "b", "c"]
+input_df = pd.DataFrame(
+    {
+        "yticklabel": str_vector,
+        "estimate": x,
+        "moerror": y,
+        "ll": x,
+        "hl": y,
+        "pval": y,
+        "formatted_pval": y,
+        "yticklabel1": str_vector,
+        "yticklabel2": str_vector,
+    }
+)
+
+
+def test_mdraw_ref_xline():
+    _, ax = plt.subplots()
+    ax = mdraw_ref_xline(
+        ax,
+        dataframe=input_df,
+        model_col="yticklabel",
+        annoteheaders=None,
+        right_annoteheaders=None,
+    )
+    assert isinstance(ax, Axes)
+
+
+def test_mdraw_yticklabels():
+    # Prepare the input DataFrame
+    str_vector = ["a", "b", "c"]
+    input_df = pd.DataFrame(
+        {
+            "yticklabel": str_vector,
+        }
+    )
+
+    # Create a matplotlib Axes object
+    _, ax = plt.subplots()
+
+    # Call the function
+    ax = mdraw_yticklabels(input_df, yticklabel="yticklabel", flush=True, ax=ax)
+
+    assert isinstance(ax, Axes)
+    assert [label.get_text() for label in ax.get_yticklabels()] == str_vector