diff --git a/benchmark/tests/scripts/Be_List_test.py b/benchmark/tests/scripts/Be_List_test.py
index a47a2ff..a06e429 100644
--- a/benchmark/tests/scripts/Be_List_test.py
+++ b/benchmark/tests/scripts/Be_List_test.py
@@ -1,3 +1,5 @@
+import os
+from ...Utils import Folders
 from ..TestBase import TestBase
 
 
@@ -18,4 +20,27 @@ class BeListTest(TestBase):
         self.assertEqual(stdout.getvalue(), "** No results found **\n")
 
     def test_be_list_nan(self):
-        pass
+        def swap_files(source_folder, target_folder, file_name):
+            source = os.path.join(source_folder, file_name)
+            target = os.path.join(target_folder, file_name)
+            os.rename(source, target)
+
+        # move nan result from hidden to results
+        file_name = (
+            "results_accuracy_XGBoost_MacBookpro16_2022-05-04_11:00:"
+            "35_0.json"
+        )
+        swap_files(Folders.hidden_results, Folders.results, file_name)
+        try:
+            stdout, stderr = self.execute_script("be_list", ["--nan", "1"])
+            self.assertEqual(stderr.getvalue(), "")
+            self.check_output_file(stdout, "be_list_nan")
+        except Exception:
+            # move back nan result file
+            swap_files(Folders.results, Folders.hidden_results, file_name)
+            self.fail("test_be_list_nan() should not raise exception")
+
+    def test_be_list_nan_no_nan(self):
+        stdout, stderr = self.execute_script("be_list", ["--nan", "1"])
+        self.assertEqual(stderr.getvalue(), "")
+        self.check_output_file(stdout, "be_list_no_nan")
diff --git a/benchmark/tests/test_files/be_list_nan.test b/benchmark/tests/test_files/be_list_nan.test
new file mode 100644
index 0000000..ed62daf
--- /dev/null
+++ b/benchmark/tests/test_files/be_list_nan.test
@@ -0,0 +1,13 @@
+Date       File                                                             Score    Time(h) Title
+========== ================================================================ ======== ======= ============================================
+2022-05-04 results_accuracy_XGBoost_MacBookpro16_2022-05-04_11:00:35_0.json      nan   3.091 Default hyperparameters
+2022-04-20 results_accuracy_ODTE_Galgo_2022-04-20_10:52:20_0.json            0.04341   6.275 Gridsearched hyperparams v022.1b random_init
+2022-01-14 results_accuracy_RandomForest_iMac27_2022-01-14_12:39:30_0.json   0.03627   0.076 Test default paramters with RandomForest
+2021-11-01 results_accuracy_STree_macbook-pro_2021-11-01_19:17:07_0.json     0.03790   1.143 default B
+2021-10-27 results_accuracy_STree_iMac27_2021-10-27_09:40:40_0.json          0.04158   0.943 default A
+2021-09-30 results_accuracy_STree_iMac27_2021-09-30_11:42:07_0.json          0.04544   0.173 With gridsearched hyperparameters
+
+****************************** Results with nan moved to hidden ******************************
+Date       File                                                             Score    Time(h) Title
+========== ================================================================ ======== ======= =======================
+2022-05-04 results_accuracy_XGBoost_MacBookpro16_2022-05-04_11:00:35_0.json      nan   3.091 Default hyperparameters
diff --git a/benchmark/tests/test_files/be_list_no_nan.test b/benchmark/tests/test_files/be_list_no_nan.test
new file mode 100644
index 0000000..e1e5dd7
--- /dev/null
+++ b/benchmark/tests/test_files/be_list_no_nan.test
@@ -0,0 +1,7 @@
+Date       File                                                            Score    Time(h) Title
+========== =============================================================== ======== ======= ============================================
+2022-04-20 results_accuracy_ODTE_Galgo_2022-04-20_10:52:20_0.json           0.04341   6.275 Gridsearched hyperparams v022.1b random_init
+2022-01-14 results_accuracy_RandomForest_iMac27_2022-01-14_12:39:30_0.json  0.03627   0.076 Test default paramters with RandomForest
+2021-11-01 results_accuracy_STree_macbook-pro_2021-11-01_19:17:07_0.json    0.03790   1.143 default B
+2021-10-27 results_accuracy_STree_iMac27_2021-10-27_09:40:40_0.json         0.04158   0.943 default A
+2021-09-30 results_accuracy_STree_iMac27_2021-09-30_11:42:07_0.json         0.04544   0.173 With gridsearched hyperparameters