diff --git a/src/markitdown/_markitdown.py b/src/markitdown/_markitdown.py
index 17c9dab..63f7c9d 100644
--- a/src/markitdown/_markitdown.py
+++ b/src/markitdown/_markitdown.py
@@ -586,7 +586,6 @@ class PptxConverter(HtmlConverter):
                 if shape.has_chart:
                     md_content += self._convert_chart_to_markdown(shape.chart)
 
-
                 # Text areas
                 elif shape.has_text_frame:
                     if shape == title:
@@ -621,11 +620,6 @@ class PptxConverter(HtmlConverter):
             return True
         return False
 
-    def _is_chart(self, shape):
-        if shape.shape_type == pptx.enum.shapes.MSO_SHAPE_TYPE.CHART:
-            return True
-        return False
-
     def _convert_chart_to_markdown(self, chart):
         md = "\n\n### Chart"
         if chart.has_title:
@@ -649,6 +643,7 @@ class PptxConverter(HtmlConverter):
         separator = "|" + "|".join(["---"] * len(data[0])) + "|"
         return md + "\n".join([header, separator] + markdown_table[1:])
 
+
 class MediaConverter(DocumentConverter):
     """
     Abstract class for multi-modal media (e.g., images and audio)
diff --git a/tests/test_markitdown.py b/tests/test_markitdown.py
index ee08300..4922c49 100644
--- a/tests/test_markitdown.py
+++ b/tests/test_markitdown.py
@@ -57,8 +57,8 @@ PPTX_TEST_STRINGS = [
     "44bf7d06-5e7a-4a40-a2e1-a2e42ef28c8a",
     "1b92870d-e3b5-4e65-8153-919f4ff45592",
     "AutoGen: Enabling Next-Gen LLM Applications via Multi-Agent Conversation",
-    "a3f6004b-6f4f-4ea8-bee3-3741f4dc385f", # chart title
-    "2003", # chart value
+    "a3f6004b-6f4f-4ea8-bee3-3741f4dc385f",  # chart title
+    "2003",  # chart value
 ]
 
 BLOG_TEST_URL = "https://microsoft.github.io/autogen/blog/2023/04/21/LLM-tuning-math"