diff --git a/test/test_matrixmania/test_projection.py b/test/test_matrixmania/test_projection.py
index 43f9d7e..a0c6b7b 100644
--- a/test/test_matrixmania/test_projection.py
+++ b/test/test_matrixmania/test_projection.py
@@ -1,4 +1,7 @@
-from matrixmania import project_ortho
+import pytest
+
+from matrixmania import project_ortho, project_perspective
+
 
 def test_project_ortho_without_scale() -> None:
     """Orthogonal projection ignores z when scale is omitted."""
@@ -11,6 +14,7 @@ def test_project_ortho_without_scale() -> None:
     # Assert
     assert result == (1.0, 2.0)
 
+
 def test_project_ortho_with_scale() -> None:
     """Orthogonal projection scales x and y and ignores z."""
     # Arrange
@@ -18,7 +22,44 @@ def test_project_ortho_with_scale() -> None:
     scale = 100
 
     # Act
-    result = (project_ortho(point, scale=scale))
+    result = project_ortho(point, scale=scale)
 
     # Assert
     assert result == (100.0, 200.0)
+
+
+def test_project_perspective_with_defaults() -> None:
+    """Perspective projection uses the default focal length and distance."""
+    # Arrange
+    point = (1.0, 2.0, 3.0)
+
+    # Act
+    result = project_perspective(point)
+
+    # Assert
+    assert result == pytest.approx((1 / 7, 2 / 7))
+
+
+def test_project_perspective_with_scale_and_focal_length() -> None:
+    """Perspective projection applies scale and focal length."""
+    # Arrange
+    point = (1.0, 2.0, 3.0)
+
+    # Act
+    result = project_perspective(point, scale=100, focal_length=2)
+
+    # Assert
+    assert result == pytest.approx((200 / 7, 400 / 7))
+
+
+def test_project_perspective_with_custom_camera_distance() -> None:
+    """Perspective projection uses the supplied camera distance."""
+    # Arrange
+    point = (2.0, 4.0, 2.0)
+    camera_distance = 6.0
+
+    # Act
+    result = project_perspective(point, camera_distance=camera_distance)
+
+    # Assert
+    assert result == pytest.approx((0.25, 0.5))