diff --git a/pyresample/test/test_gradient.py b/pyresample/test/test_gradient.py
index 90983847..c911f297 100644
--- a/pyresample/test/test_gradient.py
+++ b/pyresample/test/test_gradient.py
@@ -407,103 +407,6 @@ def fake_compute(arg1, data):
         decorated('bla', data)
 
 
-def test_check_overlap():
-    """Test overlap check returning correct results."""
-    from shapely.geometry import Polygon
-
-    from pyresample.gradient import check_overlap
-
-    # If either of the polygons is False, True is returned
-    assert check_overlap(False, 3) is True
-    assert check_overlap('eggs', False) is True
-    assert check_overlap(False, False) is True
-
-    # If either the polygons is None, False is returned
-    assert check_overlap(None, 'bacon') is False
-    assert check_overlap('spam', None) is False
-    assert check_overlap(None, None) is False
-
-    # If the polygons overlap, True is returned
-    poly1 = Polygon(((0, 0), (0, 1), (1, 1), (1, 0)))
-    poly2 = Polygon(((-1, -1), (-1, 1), (1, 1), (1, -1)))
-    assert check_overlap(poly1, poly2) is True
-
-    # If the polygons do not overlap, False is returned
-    poly2 = Polygon(((5, 5), (6, 5), (6, 6), (5, 6)))
-    assert check_overlap(poly1, poly2) is False
-
-
-def test_get_border_lonlats_geos():
-    """Test that correct methods are called in get_border_lonlats() with geos inputs."""
-    from pyresample.gradient import get_border_lonlats
-    geo_def = AreaDefinition("", "", "",
-                             "+proj=geos +h=1234567", 2, 2, [1, 2, 3, 4])
-    with mock.patch("pyresample.gradient.get_geostationary_bounding_box_in_lonlats") as get_geostationary_bounding_box:
-        get_geostationary_bounding_box.return_value = 1, 2
-        res = get_border_lonlats(geo_def)
-    assert res == (1, 2)
-    get_geostationary_bounding_box.assert_called_with(geo_def, 3600)
-
-
-def test_get_border_lonlats():
-    """Test that correct methods are called in get_border_lonlats()."""
-    from pyresample.boundary import SimpleBoundary
-    from pyresample.gradient import get_border_lonlats
-    lon_sides = SimpleBoundary(side1=np.array([1]), side2=np.array([2]),
-                               side3=np.array([3]), side4=np.array([4]))
-    lat_sides = SimpleBoundary(side1=np.array([1]), side2=np.array([2]),
-                               side3=np.array([3]), side4=np.array([4]))
-    geo_def = AreaDefinition("", "", "",
-                             "+proj=lcc +lat_1=25 +lat_2=25", 2, 2, [1, 2, 3, 4])
-    with mock.patch.object(geo_def, "get_boundary_lonlats") as get_boundary_lonlats:
-        get_boundary_lonlats.return_value = lon_sides, lat_sides
-        lon_b, lat_b = get_border_lonlats(geo_def)
-    assert np.all(lon_b == np.array([1, 2, 3, 4]))
-    assert np.all(lat_b == np.array([1, 2, 3, 4]))
-
-
-@mock.patch('pyresample.gradient.Polygon')
-@mock.patch('pyresample.gradient.get_border_lonlats')
-def test_get_polygon(get_border_lonlats, Polygon):
-    """Test polygon creation."""
-    from pyresample.gradient import get_polygon
-
-    # Valid polygon
-    get_border_lonlats.return_value = (1, 2)
-    geo_def = mock.MagicMock()
-    prj = mock.MagicMock()
-    x_borders = [0, 0, 1, 1]
-    y_borders = [0, 1, 1, 0]
-    boundary = [(0, 0), (0, 1), (1, 1), (1, 0)]
-    prj.return_value = (x_borders, y_borders)
-    poly = mock.MagicMock(area=2.0)
-    Polygon.return_value = poly
-    res = get_polygon(prj, geo_def)
-    get_border_lonlats.assert_called_with(geo_def)
-    prj.assert_called_with(1, 2)
-    Polygon.assert_called_with(boundary)
-    assert res is poly
-
-    # Some border points are invalid, those should have been removed
-    x_borders = [np.inf, 0, 0, 0, 1, np.nan, 2]
-    y_borders = [-1, 0, np.nan, 1, 1, np.nan, -1]
-    boundary = [(0, 0), (0, 1), (1, 1), (2, -1)]
-    prj.return_value = (x_borders, y_borders)
-    res = get_polygon(prj, geo_def)
-    Polygon.assert_called_with(boundary)
-    assert res is poly
-
-    # Polygon area is NaN
-    poly.area = np.nan
-    res = get_polygon(prj, geo_def)
-    assert res is None
-
-    # Polygon area is 0.0
-    poly.area = 0.0
-    res = get_polygon(prj, geo_def)
-    assert res is None
-
-
 @mock.patch('pyresample.gradient.one_step_gradient_search')
 def test_gradient_resample_data(one_step_gradient_search):
     """Test that one_step_gradient_search() is called with proper array shapes."""