diff --git a/X10D.Tests/src/Drawing/PointFTests.cs b/X10D.Tests/src/Drawing/PointFTests.cs
index db74ae3..52c33bc 100644
--- a/X10D.Tests/src/Drawing/PointFTests.cs
+++ b/X10D.Tests/src/Drawing/PointFTests.cs
@@ -7,6 +7,28 @@ namespace X10D.Tests.Drawing;
 [TestClass]
 public class PointFTests
 {
+    [TestMethod]
+    public void IsOnLine_ShouldReturnTrue_GivenPointOnLine()
+    {
+        var point = new PointF(1.0f, 0.0f);
+        var line = new LineF(PointF.Empty, new PointF(2.0f, 0.0f));
+
+        Assert.IsTrue(point.IsOnLine(line));
+        Assert.IsTrue(point.IsOnLine(line.Start, line.End));
+        Assert.IsTrue(point.IsOnLine(line.Start.ToVector2(), line.End.ToVector2()));
+    }
+
+    [TestMethod]
+    public void IsOnLine_ShouldReturnFalse_GivenPointNotOnLine()
+    {
+        var point = new PointF(1.0f, 1.0f);
+        var line = new LineF(PointF.Empty, new PointF(2.0f, 0.0f));
+
+        Assert.IsFalse(point.IsOnLine(line));
+        Assert.IsFalse(point.IsOnLine(line.Start, line.End));
+        Assert.IsFalse(point.IsOnLine(line.Start.ToVector2(), line.End.ToVector2()));
+    }
+
     [TestMethod]
     public void Round_ShouldRoundToNearestInteger_GivenNoParameters()
     {
diff --git a/X10D.Tests/src/Drawing/PointTests.cs b/X10D.Tests/src/Drawing/PointTests.cs
index e03fd2f..19e5890 100644
--- a/X10D.Tests/src/Drawing/PointTests.cs
+++ b/X10D.Tests/src/Drawing/PointTests.cs
@@ -7,6 +7,28 @@ namespace X10D.Tests.Drawing;
 [TestClass]
 public class PointTests
 {
+    [TestMethod]
+    public void IsOnLine_ShouldReturnTrue_GivenPointOnLine()
+    {
+        var point = new Point(1, 0);
+        var line = new Line(Point.Empty, new Point(2, 0));
+
+        Assert.IsTrue(point.IsOnLine(line));
+        Assert.IsTrue(point.IsOnLine(line.Start, line.End));
+        Assert.IsTrue(point.IsOnLine(line.Start.ToVector2(), line.End.ToVector2()));
+    }
+
+    [TestMethod]
+    public void IsOnLine_ShouldReturnFalse_GivenPointNotOnLine()
+    {
+        var point = new Point(1, 1);
+        var line = new Line(Point.Empty, new Point(2, 0));
+
+        Assert.IsFalse(point.IsOnLine(line));
+        Assert.IsFalse(point.IsOnLine(line.Start, line.End));
+        Assert.IsFalse(point.IsOnLine(line.Start.ToVector2(), line.End.ToVector2()));
+    }
+
     [TestMethod]
     public void ToSize_ShouldReturnSize_WithEquivalentMembers()
     {