diff --git a/X10D.Tests/src/Core/DoubleTests.cs b/X10D.Tests/src/Core/DoubleTests.cs
index 0c4caf8..7190cfe 100644
--- a/X10D.Tests/src/Core/DoubleTests.cs
+++ b/X10D.Tests/src/Core/DoubleTests.cs
@@ -37,6 +37,10 @@ namespace X10D.Tests.Core
         {
             Assert.AreEqual(Math.PI, 180.0.DegreesToRadians());
             Assert.AreEqual(Math.PI * 1.5, 270.0.DegreesToRadians());
+            Assert.AreEqual(0.0, 0.0.DegreesToRadians());
+            Assert.AreEqual(0.017453292519943295, 1.0.DegreesToRadians());
+            Assert.AreEqual(0.10471975511965978, 6.0.DegreesToRadians());
+            Assert.AreEqual(0.20943951023931956, 12.0.DegreesToRadians());
         }
 
         /// <summary>
@@ -78,6 +82,10 @@ namespace X10D.Tests.Core
         {
             Assert.AreEqual(180.0, Math.PI.RadiansToDegrees());
             Assert.AreEqual(360.0, (2.0 * Math.PI).RadiansToDegrees());
+            Assert.AreEqual(0.0, 0.0.RadiansToDegrees());
+            Assert.AreEqual(1.0, 0.017453292519943295.RadiansToDegrees());
+            Assert.AreEqual(6.000000000000001, 0.10471975511965978.RadiansToDegrees()); // rounding errors are fun
+            Assert.AreEqual(12.0, 0.20943951023931953.RadiansToDegrees());
         }
 
         /// <summary>
diff --git a/X10D.Tests/src/Core/SingleTests.cs b/X10D.Tests/src/Core/SingleTests.cs
new file mode 100644
index 0000000..d562e94
--- /dev/null
+++ b/X10D.Tests/src/Core/SingleTests.cs
@@ -0,0 +1,29 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace X10D.Tests.Core;
+
+[TestClass]
+public class SingleTests
+{
+    [TestMethod]
+    public void DegreesToRadians()
+    {
+        Assert.AreEqual(MathF.PI, 180.0f.DegreesToRadians());
+        Assert.AreEqual(MathF.PI * 1.5f, 270.0f.DegreesToRadians());
+        Assert.AreEqual(0.0f, 0.0f.DegreesToRadians());
+        Assert.AreEqual(0.017453292f, 1.0f.DegreesToRadians());
+        Assert.AreEqual(0.10471976f, 6.0f.DegreesToRadians());
+        Assert.AreEqual(0.20943952f, 12.0f.DegreesToRadians());
+    }
+
+    [TestMethod]
+    public void RadiansToDegrees()
+    {
+        Assert.AreEqual(180.0f, MathF.PI.RadiansToDegrees());
+        Assert.AreEqual(270.0f, (MathF.PI * 1.5f).RadiansToDegrees());
+        Assert.AreEqual(0.0, 0.0f.RadiansToDegrees());
+        Assert.AreEqual(0.99999994f, 0.017453292f.RadiansToDegrees()); // rounding errors are fun
+        Assert.AreEqual(6.0f, 0.10471976f.RadiansToDegrees());
+        Assert.AreEqual(12.0f, 0.20943952f.RadiansToDegrees());
+    }
+}