diff --git a/app/algorithms/leakage/identifier.py b/app/algorithms/leakage/identifier.py
index c2044b1..6115d89 100644
--- a/app/algorithms/leakage/identifier.py
+++ b/app/algorithms/leakage/identifier.py
@@ -122,12 +122,14 @@ def _worker_evaluate(raw_ratios: np.ndarray) -> float:
 
 
 class LeakageIdentifier:
-    FLOW_UNIT_TO_M3S = {
-        "m3/s": 1.0,
-        "m3/h": 1.0 / 3600.0,
-        "L/s": 1.0 / 1000.0,
-        "L/min": 1.0 / 60000.0,
-    }
+    FLOW_UNIT_TO_M3S = {
+        "m3/s": 1.0,
+        "m³/s": 1.0,
+        "m3/h": 1.0 / 3600.0,
+        "m³/h": 1.0 / 3600.0,
+        "L/s": 1.0 / 1000.0,
+        "L/min": 1.0 / 60000.0,
+    }
 
     @classmethod
     def _flow_to_m3s(cls, value: float, unit: str) -> float:
diff --git a/tests/unit/test_leakage_flow_units.py b/tests/unit/test_leakage_flow_units.py
new file mode 100644
index 0000000..eea74a5
--- /dev/null
+++ b/tests/unit/test_leakage_flow_units.py
@@ -0,0 +1,50 @@
+import pytest
+import importlib.util
+import sys
+import types
+from pathlib import Path
+
+
+def _load_leakage_identifier():
+    algorithms_package = types.ModuleType("app.algorithms")
+    algorithms_package.__path__ = []
+    utils_module = types.ModuleType("app.algorithms._utils")
+    utils_module._cleanup_temp_files = lambda *args, **kwargs: None
+    sys.modules["app.algorithms"] = algorithms_package
+    sys.modules["app.algorithms._utils"] = utils_module
+
+    module_path = (
+        Path(__file__).resolve().parents[2]
+        / "app"
+        / "algorithms"
+        / "leakage"
+        / "identifier.py"
+    )
+    spec = importlib.util.spec_from_file_location(
+        "tests_leakage_identifier_under_test", module_path
+    )
+    module = importlib.util.module_from_spec(spec)
+    assert spec and spec.loader
+    spec.loader.exec_module(module)
+    return module.LeakageIdentifier
+
+
+@pytest.mark.parametrize(
+    ("unit", "expected"),
+    [
+        ("m3/s", 1.0),
+        ("m³/s", 1.0),
+        ("m3/h", 3600.0),
+        ("m³/h", 3600.0),
+    ],
+)
+def test_leakage_identifier_accepts_display_flow_units(unit, expected):
+    LeakageIdentifier = _load_leakage_identifier()
+
+    assert LeakageIdentifier._flow_from_m3s(1.0, unit) == expected
+
+
+def test_leakage_identifier_accepts_display_flow_units_for_input():
+    LeakageIdentifier = _load_leakage_identifier()
+
+    assert LeakageIdentifier._flow_to_m3s(3600.0, "m³/h") == 1.0