diff --git a/CHANGELOG.md b/CHANGELOG.md
index de5719753ba..119587906dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 * Fixed bug in `VolMesh.delete_cell`.
+* Fixed `NoneType` error when calling `compas.geometry.Sphere.edges`.
+
 
 ### Removed
 
diff --git a/src/compas/geometry/shapes/capsule.py b/src/compas/geometry/shapes/capsule.py
index e6668e85234..8ba87f97cd4 100644
--- a/src/compas/geometry/shapes/capsule.py
+++ b/src/compas/geometry/shapes/capsule.py
@@ -297,7 +297,7 @@ def compute_faces(self):  # type: () -> list[list[int]]
         if v % 2 == 1:
             v += 1
 
-        vertices = self._vertices
+        vertices = self.vertices
 
         faces = []
 
diff --git a/src/compas/geometry/shapes/cone.py b/src/compas/geometry/shapes/cone.py
index 6036df7eb3a..0281bab723b 100644
--- a/src/compas/geometry/shapes/cone.py
+++ b/src/compas/geometry/shapes/cone.py
@@ -267,7 +267,7 @@ def compute_faces(self):  # type: () -> list[list[int]]
         list[list[int]]
 
         """
-        vertices = self._vertices
+        vertices = self.vertices
 
         faces = []
         first = 0
diff --git a/src/compas/geometry/shapes/cylinder.py b/src/compas/geometry/shapes/cylinder.py
index d13e036591c..29857a3743e 100644
--- a/src/compas/geometry/shapes/cylinder.py
+++ b/src/compas/geometry/shapes/cylinder.py
@@ -267,7 +267,7 @@ def compute_faces(self):  # type: () -> list[list[int]]
         """
         u = self.resolution_u
 
-        vertices = self._vertices
+        vertices = self.vertices
 
         faces = []
         # side faces
diff --git a/src/compas/geometry/shapes/sphere.py b/src/compas/geometry/shapes/sphere.py
index 3dba8859a1d..0124dc01470 100644
--- a/src/compas/geometry/shapes/sphere.py
+++ b/src/compas/geometry/shapes/sphere.py
@@ -218,7 +218,7 @@ def compute_faces(self):  # type: () -> list[list[int]]
         u = self.resolution_u
         v = self.resolution_v
 
-        vertices = self._vertices
+        vertices = self.vertices
 
         faces = []
 
diff --git a/tests/compas/geometry/test_capsule.py b/tests/compas/geometry/test_capsule.py
new file mode 100644
index 00000000000..51ebac0ea66
--- /dev/null
+++ b/tests/compas/geometry/test_capsule.py
@@ -0,0 +1,16 @@
+import pytest
+
+from compas.geometry import Capsule
+
+
+@pytest.fixture
+def capsule():
+    return Capsule(123.0, 13.0)
+
+
+def test_capsule_discretization(capsule):
+    # just checking these don't break. Could not quickly find a formula that worked to test the actual values
+    # as function of the resolution
+    assert capsule.edges
+    assert capsule.faces
+    assert capsule.vertices
diff --git a/tests/compas/geometry/test_cone.py b/tests/compas/geometry/test_cone.py
new file mode 100644
index 00000000000..1a0d331b99b
--- /dev/null
+++ b/tests/compas/geometry/test_cone.py
@@ -0,0 +1,16 @@
+import pytest
+
+from compas.geometry import Cone
+
+
+@pytest.fixture
+def cone():
+    return Cone(432.0, 123.0)
+
+
+def test_cone_discretization(cone):
+    # just checking these don't break. Could not quickly find a formula that worked to test the actual values
+    # as function of the resolution
+    assert cone.edges
+    assert cone.faces
+    assert cone.vertices
diff --git a/tests/compas/geometry/test_cylinder.py b/tests/compas/geometry/test_cylinder.py
new file mode 100644
index 00000000000..56ce885efeb
--- /dev/null
+++ b/tests/compas/geometry/test_cylinder.py
@@ -0,0 +1,15 @@
+import pytest
+from compas.geometry import Cylinder
+
+
+@pytest.fixture
+def cylinder():
+    return Cylinder(radius=0.3, height=1.6)
+
+
+def test_cylinder_discretization(cylinder):
+    # just checking these don't break. Could not quickly find a formula that worked to test the actual values
+    # as function of the resolution
+    assert cylinder.edges
+    assert cylinder.faces
+    assert cylinder.vertices
diff --git a/tests/compas/geometry/test_shpere.py b/tests/compas/geometry/test_shpere.py
new file mode 100644
index 00000000000..1be9ba4941d
--- /dev/null
+++ b/tests/compas/geometry/test_shpere.py
@@ -0,0 +1,19 @@
+import pytest
+
+from compas.geometry import Frame
+from compas.geometry import Sphere
+
+
+@pytest.fixture
+def sphere():
+    return Sphere(450.0, Frame.worldXY())
+
+
+def test_sphere_discretization(sphere):
+    expected_face_count = sphere.resolution_v * sphere.resolution_u
+    expected_vertex_count = (sphere.resolution_v - 1) * sphere.resolution_u + 2
+    expected_edge_count = expected_face_count * 2 - sphere.resolution_u
+
+    assert len(sphere.edges) == expected_edge_count
+    assert len(sphere.faces) == expected_face_count
+    assert len(sphere.vertices) == expected_vertex_count