diff --git a/testrail_api_reporter/engines/plotly_reporter.py b/testrail_api_reporter/engines/plotly_reporter.py
index ae89d70..c1bdd30 100644
--- a/testrail_api_reporter/engines/plotly_reporter.py
+++ b/testrail_api_reporter/engines/plotly_reporter.py
@@ -231,7 +231,7 @@ def draw_test_case_by_area(self, filename=None, cases=None, ar_colors=None, line
 
     def draw_history_state_chart(
         self,
-        chart_name: str,
+        chart_name: str | None = None,
         history_data=None,
         filename=None,
         trace1_decor=None,
@@ -257,7 +257,7 @@ def draw_history_state_chart(
         :param reverse_traces: reverse traces order
         :return: none
         """
-        if not chart_name:
+        if chart_name is None:
             raise ValueError("No chart name is provided, report aborted!")
         filename = filename if filename else f"{filename_pattern}_{chart_name.replace(' ', '_')}.csv"
         trace1_decor = (
diff --git a/tests/engines/test_engines_plotly_reporter_draw_history_state_chart.py b/tests/engines/test_engines_plotly_reporter_draw_history_state_chart.py
new file mode 100644
index 0000000..11d99b4
--- /dev/null
+++ b/tests/engines/test_engines_plotly_reporter_draw_history_state_chart.py
@@ -0,0 +1,121 @@
+# -*- coding: utf-8 -*-
+"""Tests for plotly_reporter module, the PlotlyReporter clas, draw_history_state_chart method"""
+
+from os import path, remove, getcwd
+from random import choice, randint
+
+import pytest
+from faker import Faker
+
+
+fake = Faker()
+
+
+def test_draw_history_state_chart_no_chart_name(caplog, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_history_state_chart without chart_name should raise ValueError
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    with pytest.raises(ValueError, match="No chart name is provided, report aborted!"):
+        random_plotly_reporter.draw_history_state_chart()  # type: ignore
+
+
+def test_draw_history_state_chart_no_filename(caplog, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_test_case_by_priority without filename should raise ValueError
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    with pytest.raises(ValueError, match="No output filename is provided, report aborted!"):
+        random_plotly_reporter.draw_test_case_by_area(cases=[fake.pydict()])
+        random_plotly_reporter.draw_history_state_chart()
+
+
+def test_draw_history_state_chart_creates_file(caplog, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with valid parameters should create file
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_creates_correct_image(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with valid parameters should create valid image
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_default_history_data(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with default history data
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_custom_history_data(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with custom history data
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_trace1_decor(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with custom trace1 decor
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_trace2_decor(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with custom trace2 decor
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_reverse_traces(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with reverced traces
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError
+
+
+def test_draw_history_state_chart_filename_pattern(caplog, random_plotly_reporter, compare_image):
+    """
+    Init PlotlyReporter and call draw_history_state_chart with reverced traces
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    :param compare_image: fixture, returns function to compare images
+    """
+    raise NotImplementedError