diff --git a/Engine.Tests/Behaviour_Tests.cs b/Engine.Tests/Behaviour_Tests.cs
new file mode 100644
index 0000000..56cd9a7
--- /dev/null
+++ b/Engine.Tests/Behaviour_Tests.cs
@@ -0,0 +1,71 @@
+using Syntriax.Engine.Core;
+
+namespace Engine.Tests;
+
+public class Behaviour_Tests
+{
+    private static IUniverseObject CreateUniverseObject()
+    {
+        UniverseObject universeObject = new();
+        BehaviourController behaviourController = new();
+
+        universeObject.Assign(new StateEnable());
+        universeObject.StateEnable.Assign(universeObject);
+
+        behaviourController.Assign(new StateEnable());
+        behaviourController.StateEnable.Assign(behaviourController);
+
+        behaviourController.Assign(universeObject);
+        universeObject.Assign(behaviourController);
+
+        universeObject.Initialize();
+        behaviourController.Initialize();
+
+        return universeObject;
+    }
+
+    [Fact]
+    public void BehaviourActive()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+
+        BehaviourX behaviourX = universeObject.BehaviourController.AddBehaviour<BehaviourX>();
+
+        Assert.True(behaviourX.IsActive);
+    }
+
+    [Fact]
+    public void BehaviourNotActiveOnDisabled()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+
+        BehaviourX behaviourX = universeObject.BehaviourController.AddBehaviour<BehaviourX>();
+        behaviourX.StateEnable.Enabled = false;
+
+        Assert.False(behaviourX.IsActive);
+    }
+
+    [Fact]
+    public void BehaviourNotActiveOnBehaviourControllerDisabled()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+
+        BehaviourX behaviourX = universeObject.BehaviourController.AddBehaviour<BehaviourX>();
+        universeObject.BehaviourController.StateEnable.Enabled = false;
+
+        Assert.False(behaviourX.IsActive);
+    }
+
+    [Fact]
+    public void BehaviourNotActiveOnUniverseObjectDisabled()
+    {
+        IUniverseObject universeObject = CreateUniverseObject();
+
+        BehaviourX behaviourX = universeObject.BehaviourController.AddBehaviour<BehaviourX>();
+        universeObject.StateEnable.Enabled = false;
+
+        Assert.False(behaviourX.IsActive);
+    }
+
+    public class BehaviourX : BehaviourBase;
+}