diff --git a/Tests/CameraTests.cs b/Tests/CameraTests.cs
new file mode 100644
index 0000000..faa319d
--- /dev/null
+++ b/Tests/CameraTests.cs
@@ -0,0 +1,30 @@
+using Microsoft.Xna.Framework;
+using MLEM.Cameras;
+using NUnit.Framework;
+
+namespace Tests {
+    public class CameraTests {
+
+        private TestGame game;
+
+        [SetUp]
+        public void SetUp() {
+            this.game = TestGame.Create();
+        }
+
+        [TearDown]
+        public void TearDown() {
+            this.game?.Dispose();
+        }
+
+        [Test]
+        public void TestConversions([Range(-4, 4, 4F)] float x, [Range(-4, 4, 4F)] float y) {
+            var camera = new Camera(this.game.GraphicsDevice);
+            var pos = new Vector2(x, y);
+            var cam = camera.ToCameraPos(pos);
+            var ret = camera.ToWorldPos(cam);
+            Assert.AreEqual(pos, ret);
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/Tests/TexturePackerTests.cs b/Tests/TexturePackerTests.cs
new file mode 100644
index 0000000..90cf5cb
--- /dev/null
+++ b/Tests/TexturePackerTests.cs
@@ -0,0 +1,76 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using MLEM.Data;
+using MLEM.Extensions;
+using MLEM.Textures;
+using NUnit.Framework;
+
+namespace Tests {
+    public class TexturePackerTests {
+
+        private Texture2D testTexture;
+        private TestGame game;
+
+        [SetUp]
+        public void SetUp() {
+            this.game = TestGame.Create();
+            this.testTexture = new Texture2D(this.game.GraphicsDevice, 256, 256);
+        }
+
+        [TearDown]
+        public void TearDown() {
+            this.game?.Dispose();
+            this.testTexture?.Dispose();
+        }
+
+        [Test]
+        public void TestPacking() {
+            using var packer = new RuntimeTexturePacker();
+            for (var i = 0; i < 5; i++) {
+                var width = 16 * (i + 1);
+                packer.Add(new TextureRegion(this.testTexture, 0, 0, width, 64), r => {
+                    Assert.AreEqual(r.Width, width);
+                    Assert.AreEqual(r.Height, 64);
+                });
+            }
+            packer.Pack(this.game.GraphicsDevice);
+            Assert.AreEqual(packer.PackedTexture.Width, 16 + 32 + 48 + 64 + 80);
+            Assert.AreEqual(packer.PackedTexture.Height, 64);
+        }
+
+        [Test]
+        public void TestBounds() {
+            // test forced max width
+            using var packer = new RuntimeTexturePacker(128);
+            Assert.Throws<InvalidOperationException>(() => {
+                packer.Add(new TextureRegion(this.testTexture, 0, 0, 256, 128), StubResult);
+            });
+
+            // test auto-expanding width
+            using var packer2 = new RuntimeTexturePacker(128, true);
+            Assert.DoesNotThrow(() => {
+                packer2.Add(new TextureRegion(this.testTexture, 0, 0, 256, 128), StubResult);
+            });
+            packer2.Pack(this.game.GraphicsDevice);
+
+            // test power of two forcing
+            using var packer3 = new RuntimeTexturePacker(128, forcePowerOfTwo: true);
+            packer3.Add(new TextureRegion(this.testTexture, 0, 0, 37, 170), StubResult);
+            packer3.Pack(this.game.GraphicsDevice);
+            Assert.AreEqual(64, packer3.PackedTexture.Width);
+            Assert.AreEqual(256, packer3.PackedTexture.Height);
+
+            // test square forcing
+            using var packer4 = new RuntimeTexturePacker(128, forceSquare: true);
+            packer4.Add(new TextureRegion(this.testTexture, 0, 0, 37, 170), StubResult);
+            packer4.Pack(this.game.GraphicsDevice);
+            Assert.AreEqual(170, packer4.PackedTexture.Width);
+            Assert.AreEqual(170, packer4.PackedTexture.Height);
+        }
+
+        private static void StubResult(TextureRegion region) {
+        }
+
+    }
+}
\ No newline at end of file
diff --git a/Tests/UiTests.cs b/Tests/UiTests.cs
index c265237..37f462c 100644
--- a/Tests/UiTests.cs
+++ b/Tests/UiTests.cs
@@ -30,7 +30,7 @@ namespace Tests {
             };
             invalidPanel.AddChild(new Paragraph(Anchor.AutoRight, 1, "This is some test text!", true));
             invalidPanel.AddChild(new VerticalSpace(1));
-            Assert.Throws<ArithmeticException>(() => AddAndUpdate(invalidPanel));
+            Assert.Throws<ArithmeticException>(() => this.AddAndUpdate(invalidPanel));
         }
 
         [Test]
@@ -49,7 +49,7 @@ namespace Tests {
                     CanBeMoused = false
                 });
             }
-            AddAndUpdate(group);
+            this.AddAndUpdate(group);
 
             // group has 1 panel with 1 scroll bar, and the panel's 10 children
             Assert.AreEqual(1, group.GetChildren().Count());
@@ -66,12 +66,25 @@ namespace Tests {
             Assert.AreEqual(testBtn.GetChildren<Group>().Single().DisplayArea.Width, (150 - 5 - 10 - 3 - 3) * 0.5F);
         }
 
+        [Test]
+        public void TestStyle() {
+            var style = new StyleProp<string>();
+            Assert.AreEqual(null, style.Value);
+            style.SetFromStyle("from style");
+            Assert.AreEqual("from style", style.Value);
+            style.Set("custom");
+            Assert.AreEqual("custom", style.Value);
+            style.SetFromStyle("from style again");
+            Assert.AreEqual("custom", style.Value);
+        }
+
         private void AddAndUpdate(Element element) {
             foreach (var root in this.game.UiSystem.GetRootElements())
                 this.game.UiSystem.Remove(root.Name);
-            
+
             this.game.UiSystem.Add("Test", element);
             element.ForceUpdateArea();
         }
+
     }
 }
\ No newline at end of file