diff --git a/plugins/ufm_log_analyzer_plugin/src/loganalyze/log_analyzers/base_analyzer.py b/plugins/ufm_log_analyzer_plugin/src/loganalyze/log_analyzers/base_analyzer.py
index a95ca640d..82ef67c82 100644
--- a/plugins/ufm_log_analyzer_plugin/src/loganalyze/log_analyzers/base_analyzer.py
+++ b/plugins/ufm_log_analyzer_plugin/src/loganalyze/log_analyzers/base_analyzer.py
@@ -185,7 +185,11 @@ def __init__(
     ):
         super().__init__(dest_image_path)
         dataframes = [pd.read_csv(ufm_log) for ufm_log in logs_csvs]
-        df = pd.concat(dataframes, ignore_index=True)
+        if dataframes:
+            df = pd.concat(dataframes, ignore_index=True)
+        else:
+            df = pd.DataFrame()  # Return an empty DataFrame if dataframes is empty
+
         if sort_timestamp:
             df[DataConstants.TIMESTAMP] = pd.to_datetime(df[DataConstants.TIMESTAMP])
             max_timestamp = df[DataConstants.TIMESTAMP].max()
diff --git a/plugins/ufm_log_analyzer_plugin/unit_tests/__init__.py b/plugins/ufm_log_analyzer_plugin/unit_tests/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/plugins/ufm_log_analyzer_plugin/unit_tests/test_ibdiagnet_log_analyzer.py b/plugins/ufm_log_analyzer_plugin/unit_tests/test_ibdiagnet_log_analyzer.py
new file mode 100644
index 000000000..7054f7e40
--- /dev/null
+++ b/plugins/ufm_log_analyzer_plugin/unit_tests/test_ibdiagnet_log_analyzer.py
@@ -0,0 +1,30 @@
+import unittest
+import sys
+import os
+
+sys.path.append(os.getcwd())
+sys.path.append("/".join(os.getcwd().split("/")[:-1]))
+sys.path.append("/".join(os.getcwd().split("/")[:-1]) + "/src")
+
+from loganalyze.log_analyzers.ibdiagnet_log_analyzer import IBDIAGNETLogAnalyzer
+
+
+class TestIBDIAGNETLogAnalyzer(unittest.TestCase):
+    def setUp(self):
+        # Example initialization with dummy arguments
+        self.logs_csvs = []
+        self.hours = 24
+        self.dest_image_path = "/dummy/path"
+        self.analyzer = IBDIAGNETLogAnalyzer(self.logs_csvs, self.hours, self.dest_image_path)
+
+    def test_get_fabric_size(self):
+        # Mock the _log_data_sorted attribute
+        expected_fabric_size = {"switch_count": 10, "link_count": 50}  # Example data
+        self.analyzer._log_data_sorted = expected_fabric_size # pylint: disable=protected-access
+
+        # Call the method and check the result
+        result = self.analyzer.get_fabric_size()
+        self.assertEqual(result, expected_fabric_size)
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/plugins/ufm_log_analyzer_plugin/unit_tests/test_log_analyzer.py b/plugins/ufm_log_analyzer_plugin/unit_tests/test_log_analyzer.py
deleted file mode 100644
index fd3fd1bbb..000000000
--- a/plugins/ufm_log_analyzer_plugin/unit_tests/test_log_analyzer.py
+++ /dev/null
@@ -1,5 +0,0 @@
-def test_succeed():
-    assert 2 + 2 == 4  # This will pass
-
-def test_fail():
-    assert 2 + 2 == 5  # This will fail
diff --git a/plugins/ufm_log_analyzer_plugin/unit_tests/test_ufm_top_analyzer.py b/plugins/ufm_log_analyzer_plugin/unit_tests/test_ufm_top_analyzer.py
new file mode 100644
index 000000000..a67e98dfc
--- /dev/null
+++ b/plugins/ufm_log_analyzer_plugin/unit_tests/test_ufm_top_analyzer.py
@@ -0,0 +1,33 @@
+import unittest
+import sys
+import os
+
+sys.path.append(os.getcwd())
+sys.path.append("/".join(os.getcwd().split("/")[:-1]))
+sys.path.append("/".join(os.getcwd().split("/")[:-1]) + "/src")
+
+from loganalyze.log_analyzers.ufm_top_analyzer import UFMTopAnalyzer
+
+class TestUFMTopAnalyzer(unittest.TestCase):
+    def setUp(self):
+        self.analyzer = UFMTopAnalyzer()
+
+    def test_add_analyzer(self):
+        mock_analyzer_1 = "Analyzer1"
+        mock_analyzer_2 = "Analyzer2"
+
+        # Initially, the list should be empty
+        self.assertEqual(len(self.analyzer._analyzers), 0) # pylint: disable=protected-access
+
+        # Add first analyzer and check the length
+        self.analyzer.add_analyzer(mock_analyzer_1)
+        self.assertEqual(len(self.analyzer._analyzers), 1) # pylint: disable=protected-access
+        self.assertIn(mock_analyzer_1, self.analyzer._analyzers) # pylint: disable=protected-access
+
+        # Add second analyzer and check the updated length
+        self.analyzer.add_analyzer(mock_analyzer_2)
+        self.assertEqual(len(self.analyzer._analyzers), 2) # pylint: disable=protected-access
+        self.assertIn(mock_analyzer_2, self.analyzer._analyzers) # pylint: disable=protected-access
+
+if __name__ == "__main__":
+    unittest.main()