diff --git a/tests/test_boolean_2d.py b/tests/test_boolean_2d.py
new file mode 100644
index 0000000..0301cdc
--- /dev/null
+++ b/tests/test_boolean_2d.py
@@ -0,0 +1,240 @@
+import pytest
+import os
+import math
+from yapcad.geom import *
+from yapcad.poly import *
+from yapcad.combine import *
+
+"""Test functions for 2D boolean operations based on example11.py"""
+
+# Control flag for visual tests - set via environment variable or directly
+VISUALTEST = os.environ.get('VISUALTEST', 'false').lower() in ('true', '1', 'yes')
+if VISUALTEST:
+    from yapcad.pyglet_drawable import pygletDraw
+
+
+def makeStars(center, rad=5.0, diam=2.0):
+    """Helper function to create two interlocking star patterns"""
+    poly1 = Polygon()
+    poly2 = Polygon()
+
+    for i in range(8):
+        ang = (pi2/8)*i
+        p = poly1
+        if i % 2 == 0:
+            p = poly2
+        p.addArc(arc(add(center, point(math.cos(ang)*rad,
+                                       math.sin(ang)*rad)), diam))
+    return poly1, poly2
+
+
+class TestBoolean2D:
+    """Tests for 2D boolean operations"""
+
+    def test_union_circle_roundrect(self):
+        """Test union of a circle and rounded rectangle"""
+        p1 = Polygon()
+        x = point(-2, 2)
+        p1.addArc(arc(x, 3.0))
+
+        p2 = RoundRect(7, 6, 1, point(1, -1))
+        b = Boolean('union', [p1, p2])
+
+        # Check that the boolean operation produces valid geometry
+        assert b.geom is not None
+        assert len(b.geom) > 0
+
+        # The union should produce a valid geometry list
+        assert isinstance(b.geom, list)
+
+    def test_union_stars(self):
+        """Test union of two interlocking star patterns"""
+        p1, p2 = makeStars(point(12, -10))
+        b = Boolean('union', [p1, p2])
+
+        # Check that the union produces valid geometry
+        assert b.geom is not None
+        assert len(b.geom) > 0
+
+        # Verify it's a list of geometry elements
+        assert isinstance(b.geom, list)
+
+    def test_intersection_stars(self):
+        """Test intersection of two interlocking star patterns"""
+        p1, p2 = makeStars(point(12, 10))
+        b = Boolean('intersection', [p1, p2])
+
+        # Check that the intersection produces valid geometry
+        assert b.geom is not None
+
+        # Intersection might produce multiple or single geometry elements
+        if isinstance(b.geom, list):
+            assert len(b.geom) >= 0  # Could be empty if no intersection
+
+    def test_difference_stars(self):
+        """Test difference of two interlocking star patterns"""
+        p1, p2 = makeStars(point(-12, -10))
+        b = Boolean('difference', [p2, p1])
+
+        # Check that the difference produces valid geometry
+        assert b.geom is not None
+
+        # Difference operation should produce geometry
+        if isinstance(b.geom, list):
+            assert len(b.geom) >= 0
+
+    def test_union_multiple_circles(self):
+        """Test union of multiple circles"""
+        polys = []
+        for i in range(3):
+            p = Polygon()
+            p.addArc(arc(point(i*2, 0), 1.5))
+            polys.append(p)
+
+        b = Boolean('union', polys)
+
+        # Check that the union produces valid geometry
+        assert b.geom is not None
+        assert len(b.geom) > 0
+
+    def test_difference_concentric_circles(self):
+        """Test difference of concentric circles to create a ring"""
+        outer = Polygon()
+        outer.addArc(arc(point(0, 0), 5.0))
+
+        inner = Polygon()
+        inner.addArc(arc(point(0, 0), 3.0))
+
+        b = Boolean('difference', [outer, inner])
+
+        # Check that the difference produces valid geometry (should be a ring)
+        assert b.geom is not None
+        assert len(b.geom) > 0
+
+    def test_intersection_overlapping_rectangles(self):
+        """Test intersection of two overlapping rounded rectangles"""
+        r1 = RoundRect(6, 4, 0.5, point(0, 0))
+        r2 = RoundRect(4, 6, 0.5, point(2, 0))
+
+        b = Boolean('intersection', [r1, r2])
+
+        # Check that the intersection produces valid geometry
+        assert b.geom is not None
+
+    def test_union_non_overlapping_shapes(self):
+        """Test union of non-overlapping shapes"""
+        p1 = Polygon()
+        p1.addArc(arc(point(-10, 0), 2.0))
+
+        p2 = Polygon()
+        p2.addArc(arc(point(10, 0), 2.0))
+
+        b = Boolean('union', [p1, p2])
+
+        # Non-overlapping shapes should still produce valid union
+        assert b.geom is not None
+        assert len(b.geom) > 0
+
+    def test_difference_non_overlapping_shapes(self):
+        """Test difference of non-overlapping shapes"""
+        p1 = Polygon()
+        p1.addArc(arc(point(-10, 0), 2.0))
+
+        p2 = Polygon()
+        p2.addArc(arc(point(10, 0), 2.0))
+
+        b = Boolean('difference', [p1, p2])
+
+        # Difference of non-overlapping should return first shape
+        assert b.geom is not None
+
+    def test_complex_star_operations(self):
+        """Test all three boolean operations on star patterns"""
+        center = point(0, 0)
+        p1, p2 = makeStars(center, rad=5.0, diam=2.0)
+
+        # Union
+        union = Boolean('union', [p1, p2])
+        assert union.geom is not None
+
+        # Intersection
+        intersection = Boolean('intersection', [p1, p2])
+        assert intersection.geom is not None
+
+        # Difference
+        difference = Boolean('difference', [p1, p2])
+        assert difference.geom is not None
+
+    def test_roundrect_parameters(self):
+        """Test RoundRect with various parameters"""
+        r1 = RoundRect(10, 8, 0.5, point(0, 0))
+        assert r1.geom is not None
+
+        r2 = RoundRect(5, 5, 1.0, point(5, 5))
+        assert r2.geom is not None
+
+        # Union of two rounded rectangles
+        b = Boolean('union', [r1, r2])
+        assert b.geom is not None
+
+    def test_star_generation(self):
+        """Test the makeStars helper function"""
+        p1, p2 = makeStars(point(0, 0), rad=10.0, diam=3.0)
+
+        # Both polygons should have valid geometry
+        assert p1.geom is not None
+        assert p2.geom is not None
+
+        # Each polygon has 4 arcs, and each arc generates 2 geometry elements (line + arc)
+        assert len(p1.geom) == 8
+        assert len(p2.geom) == 8
+
+
+@pytest.mark.skipif(not VISUALTEST, reason="Visual tests disabled")
+class TestBoolean2DVisual:
+    """Visual tests for 2D boolean operations (requires VISUALTEST=true)"""
+
+    @pytest.mark.visual
+    def test_visual_all_boolean_operations(self):
+        """Visual test showing all boolean operations"""
+        dd = pygletDraw()
+
+        # Union of circle and rounded rectangle
+        p1 = Polygon()
+        p1.addArc(arc(point(-2, 2), 3.0))
+        p2 = RoundRect(7, 6, 1, point(1, -1))
+        union = Boolean('union', [p1, p2])
+
+        dd.linecolor = 'aqua'
+        dd.draw(union.geom)
+
+        # Union of stars
+        p4, p5 = makeStars(point(12, -10))
+        union_stars = Boolean('union', [p4, p5])
+
+        dd.linecolor = 'white'
+        for i in range(len(union_stars.geom)):
+            dd.linecolor = i % 7 + 1
+            dd.draw(union_stars.geom[i])
+
+        # Intersection of stars
+        p6, p7 = makeStars(point(12, 10))
+        intersection_stars = Boolean('intersection', [p6, p7])
+
+        dd.linecolor = 'white'
+        dd.draw(intersection_stars.geom)
+
+        # Difference of stars
+        p8, p9 = makeStars(point(-12, -10))
+        difference_stars = Boolean('difference', [p9, p8])
+
+        dd.linecolor = 'yellow'
+        dd.draw(difference_stars.geom)
+
+        # Individual stars (no boolean operation)
+        p10, p11 = makeStars(point(-12, 10))
+        dd.linecolor = 'aqua'
+        dd.draw(p10.geom)
+        dd.draw(p11.geom)
+
+        dd.display()