diff --git a/tests/test_utils_tqdm_mod.py b/tests/test_utils_tqdm_mod.py
index 0a50e0110..707a64532 100644
--- a/tests/test_utils_tqdm_mod.py
+++ b/tests/test_utils_tqdm_mod.py
@@ -62,7 +62,6 @@ def test_set_progress_multiple_points():
         assert re.search(r"^SetBar:\s+" + re.escape(expected_progress), lines[i])
         assert expected_value in lines[i]
         bar = get_bar_visual(lines[i])
-        assert len(bar.strip()) > 0  
 
 def test_custom_unit():
     f = io.StringIO()
@@ -76,7 +75,7 @@ def test_custom_unit():
     assert last.startswith("StepBar: 100%")
     assert "4/4" in last
     assert "step/s" in last
-    assert len(bar.strip()) > 0
+    assert len(bar.replace("█", "").replace("#", "").strip()) == 0, f"Bar not full: '{bar}'"
 
 def test_clamp_above_total():
     f = io.StringIO()
@@ -95,3 +94,19 @@ def test_clamp_above_total():
     # Check that the bar us full
     assert len(bar.replace("█", "").replace("#", "").strip()) == 0, f"Bar not full: '{bar}'"
 
+def test_clamp_below_zero():
+    f = io.StringIO()
+    with redirect_stdout(f):
+        bar = tqdm_mod(total=10, desc="ClampBar", file=f)
+        bar.set(-1)
+        bar.close()
+    lines = extract_lines(f.getvalue(), "ClampBar")
+    last = lines[-1]
+    bar = get_bar_visual(last)
+
+    assert last.startswith("ClampBar: 0%")
+    assert "0/10" in last
+    assert "Hz" in last
+
+    # Check that the bar us full
+    assert len(bar.replace(" ", "").strip()) == 0, f"Bar not empty: '{bar}'"
\ No newline at end of file