diff --git a/.vscode/settings.json b/.vscode/settings.json
index 9b388533a..f04d5500c 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,6 +2,13 @@
     "python.testing.pytestArgs": [
         "tests"
     ],
-    "python.testing.unittestEnabled": false,
-    "python.testing.pytestEnabled": true
+    "python.testing.unittestEnabled": true,
+    "python.testing.pytestEnabled": false,
+    "python.testing.unittestArgs": [
+        "-v",
+        "-s",
+        "./t3",
+        "-p",
+        "test_*.py"
+    ]
 }
\ No newline at end of file
diff --git a/tests/test_flux.py b/tests/test_flux.py
index d5b62091b..6933a08b1 100644
--- a/tests/test_flux.py
+++ b/tests/test_flux.py
@@ -510,6 +510,26 @@ def test_almost_equal():
     assert almost_equal(1e-5, 1e-6, ratio=100)
     assert almost_equal(1e-6, 1e-5, ratio=100)
 
+def test_closest_bigger_number():
+    """Test getting closest bigger number and its index from a list."""
+    # Test case 1
+    num, i = flux.closest_bigger_number([1, 2, 2.5, 3, 3.5, 4.5, 5], 3.7)
+    assert num == 4.5
+    assert i == 5
+    print("\npassed test case 1")
+
+    # Test case 2
+    num, i = flux.closest_bigger_number([1, 2, 2.5, 3, 3.5, 4.5, 5], 5.5)
+    assert num is None
+    assert i is None
+    print("passed test case 2")
+
+    # Test case 3
+    num, i = flux.closest_bigger_number([1, 2, 2.5, 3, 3.5, 4.5, 5], 0.5)
+    assert num == 1
+    assert i == 0
+    print("passed test case 3")
+
 
 def teardown_module():
     """teardown any state that was previously setup with a setup_module method."""