diff --git a/tests/flow_calculations_test.py b/tests/flow_calculations_test.py
index c7841ee..7c68d56 100644
--- a/tests/flow_calculations_test.py
+++ b/tests/flow_calculations_test.py
@@ -28,26 +28,7 @@ def test_get_value_from_volt(flow_calculations):
     assert flow_calculations.get_value_from_volt(10) == pytest.approx(500)
 
 
-def test_calculate_average(flow_calculations):
-    assert flow_calculations.calculate_average(
-        flow_calculations.data["y"]
-    ) == pytest.approx(49.5)
-
-
 def test_calculate_cross_section_area(flow_calculations):
     assert flow_calculations.calculate_cross_section_area(2) == pytest.approx(pi)
     assert flow_calculations.calculate_cross_section_area(4) == pytest.approx(pi * 4)
 
-
-def test_delete_close_to_zero_values(flow_calculations):
-    data = {"x": [], "y": []}
-
-    for i in range(4):
-        data["x"].append(0)
-        data["y"].append(0)
-
-    for i in range(2):
-        data["x"].append(123)
-        data["y"].append(123)
-
-    assert flow_calculations.delete_close_zero_values(data["y"], 1) == [123, 123]