diff --git a/tests/froude_test.py b/tests/froude_test.py
index 3d73b3e..afcb1f8 100644
--- a/tests/froude_test.py
+++ b/tests/froude_test.py
@@ -2,42 +2,57 @@ import pandas as pd
 import pytest
 from scaling import froude
 
+
 def test_unit_to_same_unit():
     assert froude.model_to_proto(1, 1, 'm', 'm') == 1
     assert froude.proto_to_model(1, 1, 'm', 'm') == 1
 
+
 def test_unit_to_different_unit():
     assert froude.model_to_proto(1, 1, 'kN', 'N') == 1000
     assert froude.proto_to_model(1000, 1, 'N', 'kN') == 1
 
+
 def test_froude_length():
     assert froude.model_to_proto(1, 10, 'm', 'm') == 10
     assert froude.proto_to_model(10, 10, 'm', 'm') == 1
 
+
 def test_froude_time():
     assert froude.model_to_proto(1, 25, 's', 's') == 5
     assert froude.proto_to_model(5, 25, 's', 's') == 1
 
+
 def test_froude_force():
     assert froude.model_to_proto(1, 10, 'N', 'N') == 1000
     assert froude.proto_to_model(1000, 10, 'N', 'N') == pytest.approx(1, 0.1)
 
+
+def test_froude_overtopping():
+    assert froude.model_to_proto(10, 4, 'L/m/s', 'L/m/s') == 80
+    assert froude.proto_to_model(100, 50, 'L/m/s', 'L/m/s') == pytest.approx(
+        0.28, 0.1)
+
+
 def test_froude_time_index_dataframe():
     df_model = pd.DataFrame(index=[2], data=[20])
     df_proto = froude.model_to_proto(df_model, 16, 'mm', 'm', 's', 's')
     assert df_proto.index.values[0] == 8
 
+
 def test_froude_mass_index_dataframe():
     df_proto = pd.DataFrame(index=[4], data=[16])
     df_model = froude.proto_to_model(df_proto, 2, 'kN', 'N', 'm', 'm')
     assert df_model.index.values[0] == 2
 
+
 def test_unit_dimensions():
     assert froude.dimensions('m') == 'L^1'
     assert froude.dimensions('kg') == 'M^1'
     assert froude.dimensions('s') == 'T^1'
     assert froude.dimensions('N') == 'L^1 M^1 T^-2'
 
+
 def test_scaling_exponent():
     assert froude.scaling_exponent('m') == 1
     assert froude.scaling_exponent('kg') == 3