diff --git a/tests/test_utils_tqdm_mod.py b/tests/test_utils_tqdm_mod.py
index 0b79e51c6..74bdba12f 100644
--- a/tests/test_utils_tqdm_mod.py
+++ b/tests/test_utils_tqdm_mod.py
@@ -63,26 +63,51 @@ def test_set_progress_multiple_points():
         assert expected_value in lines[i]
         bar = get_bar_visual(lines[i])
 
-# test format_sizeof rounding
-def test_set_progress_decimal_precision():
+def test_format_sizeof_alignment():
+    floats = [0.1, 1.3, 12.5, 99.9, 100.0, 100.1]
+    expected_outputs = [
+        "  0.1",
+        "  1.3",
+        " 12.5",
+        " 99.9",
+        "100.0",
+        "100.1",
+    ]
+    
+    for val, expected in zip(floats, expected_outputs):
+        result = format_sizeof(val)
+        assert result == expected, f"For {val}, expected '{expected}' but got '{result}'"
+        assert len(result) == 5, f"Length mismatch: got '{result}' of length {len(result)}"
+
+
+# test format_sizeof rounding using tqdm
+def test_float_alignment_in_bar():
+    import io
+    from contextlib import redirect_stdout
+
     f = io.StringIO()
     with redirect_stdout(f):
-        bar = tqdm_mod(total=5, desc="FloatBar", file=f, miniters=1, mininterval=0)
-        bar.set(1.3333)
-        bar.set(3.6666)
-        bar.set(4.999)
+        bar = tqdm_mod(total=100.12, desc="AlignBar", file=f)
+        bar.set(1.3)
+        bar.set(12.5)
+        bar.set(99.9)
+        bar.set(100.0)
+        bar.set(100.1)
         bar.close()
 
-    lines = extract_lines(f.getvalue(), "FloatBar")
+    lines = extract_lines(f.getvalue(), "AlignBar")
+    
+    # Extrait uniquement les morceaux contenant "xx.x/100.1"
+    values = []
+    for line in lines:
+        match = re.search(r"(\d{1,3}\.\d)/100\.1", line)
+        if match:
+            values.append(match.group(0))  # e.g. "  1.3/100.1"
 
-    expected_values = [
-        "1.3/5",
-        "3.7/5",
-        "5.0/5",  
-    ]
+    # Vérifie que toutes les chaînes ont exactement la même longueur
+    lengths = [len(v) for v in values]
+    assert len(set(lengths)) == 1, f"Lengths differ: {lengths}, values: {values}"
 
-    for expected in expected_values:
-        assert any(expected in line for line in lines), f"{expected} not found in output:\n" + "\n".join(lines)
 
 def test_custom_unit():
     f = io.StringIO()