diff --git a/tests/assets/expected_case_by_priority.png b/tests/assets/expected_case_by_priority.png
new file mode 100644
index 0000000..9dadf4e
Binary files /dev/null and b/tests/assets/expected_case_by_priority.png differ
diff --git a/tests/engines/test_engines_plotly_reporter_draw_test_case_by_area.py b/tests/engines/test_engines_plotly_reporter_draw_test_case_by_area.py
index 511dcb0..ee2224c 100644
--- a/tests/engines/test_engines_plotly_reporter_draw_test_case_by_area.py
+++ b/tests/engines/test_engines_plotly_reporter_draw_test_case_by_area.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
-"""Tests for plotly_reporter module, the PlotlyReporter clas, draw_automation_state_report method"""
+"""Tests for plotly_reporter module, the PlotlyReporter clas, draw_test_case_by_area method"""
+
 from copy import deepcopy
 from os import path, remove, getcwd
 from random import choice
diff --git a/tests/engines/test_engines_plotly_reporter_draw_test_case_by_priority.py b/tests/engines/test_engines_plotly_reporter_draw_test_case_by_priority.py
new file mode 100644
index 0000000..e96db56
--- /dev/null
+++ b/tests/engines/test_engines_plotly_reporter_draw_test_case_by_priority.py
@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+"""Tests for plotly_reporter module, the PlotlyReporter clas, draw_test_case_by_priority method"""
+
+from os import path, remove, getcwd
+from random import choice, randint
+
+import pytest
+from faker import Faker
+
+
+fake = Faker()
+
+
+def test_draw_test_case_by_priority_no_cases(caplog, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_test_case_by_priority without cases should raise ValueError
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    with pytest.raises(ValueError, match="No TestRail values are provided, report aborted!"):
+        random_plotly_reporter.draw_test_case_by_priority(
+            filename=fake.file_name(extension=choice(("png", "jpg", "jpeg", "webp")))
+        )
+
+
+def test_draw_test_case_by_priority_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_priority(values=[fake.pydict()])
+
+
+def test_draw_test_case_by_priority_creates_file(caplog, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_test_case_by_priority with valid parameters should create file
+
+    :param caplog: caplog fixture
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    filename = fake.file_name(extension=choice(("png", "jpg", "jpeg", "webp")))
+    try:
+        random_plotly_reporter.draw_test_case_by_priority(filename=filename, values=[randint(0, 1024) for _ in range(randint(1, 4))])
+
+        assert path.exists(filename)
+    finally:
+        if path.exists(filename):
+            remove(filename)
+
+
+def test_draw_test_case_by_priority_creates_correct_image(caplog, compare_image, random_plotly_reporter):
+    """
+    Init PlotlyReporter and call draw_test_case_by_priority with valid parameters should create correct image
+
+    :param caplog: caplog fixture
+    :param compare_image: fixture, returns function to compare images
+    :param random_plotly_reporter: fixture returns PlotlyReporter
+    """
+    filename = "actual_test_case_by_priority.png"
+    try:
+        random_plotly_reporter.draw_test_case_by_priority(filename=filename, values=[1, 101, 72, 16])
+        assert compare_image(actual=filename, expected=f"{getcwd()}/tests/assets/expected_case_by_priority.png")
+    finally:
+        if path.exists(filename):
+            remove(filename)