diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/RenderTestLoader.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/RenderTestLoader.kt
index d545075ac..81fc27f6a 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/RenderTestLoader.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/RenderTestLoader.kt
@@ -26,5 +26,6 @@ class RenderTestLoader {
         RenderTestUtil.rendering.start(latch)
         latch.dec()
         latch.await()
+        RenderTestUtil.context = RenderTestUtil.rendering.renderWindow
     }
 }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/DummyRenderSystem.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/DummyRenderSystem.kt
index 0e01ff5eb..c1ae86d98 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/DummyRenderSystem.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/DummyRenderSystem.kt
@@ -95,11 +95,11 @@ class DummyRenderSystem(
     }
 
     override fun createIntUniformBuffer(data: IntArray): IntUniformBuffer {
-        return DummyIntUniformBuffer()
+        return DummyIntUniformBuffer(data)
     }
 
     override fun createFloatUniformBuffer(data: FloatBuffer): FloatUniformBuffer {
-        return DummyFloatUniformBuffer()
+        return DummyFloatUniformBuffer(data)
     }
 
     override fun createFramebuffer(): Framebuffer {
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyFloatUniformBuffer.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyFloatUniformBuffer.kt
index 415c26ba8..64374093a 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyFloatUniformBuffer.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyFloatUniformBuffer.kt
@@ -19,48 +19,35 @@ import de.bixilon.minosoft.gui.rendering.system.base.buffer.uniform.FloatUniform
 import de.bixilon.minosoft.gui.rendering.system.base.shader.NativeShader
 import java.nio.FloatBuffer
 
-class DummyFloatUniformBuffer : FloatUniformBuffer {
-    override val bindingIndex: Int
-        get() = TODO("Not yet implemented")
+class DummyFloatUniformBuffer(
+    override var buffer: FloatBuffer,
+) : FloatUniformBuffer {
+    override val bindingIndex: Int = 0
 
     override fun upload(range: IntRange) {
-        TODO("Not yet implemented")
     }
 
     override fun upload() {
-        TODO("Not yet implemented")
     }
 
     override fun use(shader: NativeShader, bufferName: String) {
-        TODO("Not yet implemented")
     }
 
-    override val state: RenderableBufferStates
-        get() = TODO("Not yet implemented")
-    override val type: RenderableBufferTypes
-        get() = TODO("Not yet implemented")
+    override val state: RenderableBufferStates = RenderableBufferStates.UPLOADED
+    override val type: RenderableBufferTypes = RenderableBufferTypes.UNIFORM_BUFFER
 
     override fun init() {
-        TODO("Not yet implemented")
     }
 
     override fun initialUpload() {
-        TODO("Not yet implemented")
     }
 
     override fun bind() {
-        TODO("Not yet implemented")
     }
 
     override fun unbind() {
-        TODO("Not yet implemented")
     }
 
     override fun unload() {
-        TODO("Not yet implemented")
     }
-
-    override var buffer: FloatBuffer
-        get() = TODO("Not yet implemented")
-        set(value) {}
 }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyIntUniformBuffer.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyIntUniformBuffer.kt
index 681d15d69..8f5b5a254 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyIntUniformBuffer.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/buffer/uniform/DummyIntUniformBuffer.kt
@@ -18,48 +18,35 @@ import de.bixilon.minosoft.gui.rendering.system.base.buffer.RenderableBufferType
 import de.bixilon.minosoft.gui.rendering.system.base.buffer.uniform.IntUniformBuffer
 import de.bixilon.minosoft.gui.rendering.system.base.shader.NativeShader
 
-class DummyIntUniformBuffer : IntUniformBuffer {
-    override val bindingIndex: Int
-        get() = TODO("Not yet implemented")
+class DummyIntUniformBuffer(
+    override var data: IntArray,
+) : IntUniformBuffer {
+    override val bindingIndex: Int = 0
 
     override fun upload(range: IntRange) {
-        TODO("Not yet implemented")
     }
 
     override fun upload() {
-        TODO("Not yet implemented")
     }
 
     override fun use(shader: NativeShader, bufferName: String) {
-        TODO("Not yet implemented")
     }
 
-    override val state: RenderableBufferStates
-        get() = TODO("Not yet implemented")
-    override val type: RenderableBufferTypes
-        get() = TODO("Not yet implemented")
+    override val state: RenderableBufferStates = RenderableBufferStates.UPLOADED
+    override val type: RenderableBufferTypes = RenderableBufferTypes.UNIFORM_BUFFER
 
     override fun init() {
-        TODO("Not yet implemented")
     }
 
     override fun initialUpload() {
-        TODO("Not yet implemented")
     }
 
     override fun bind() {
-        TODO("Not yet implemented")
     }
 
     override fun unbind() {
-        TODO("Not yet implemented")
     }
 
     override fun unload() {
-        TODO("Not yet implemented")
     }
-
-    override var data: IntArray
-        get() = TODO("Not yet implemented")
-        set(value) {}
 }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyStaticTextureArray.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyStaticTextureArray.kt
index d1e6ead11..09a92a823 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyStaticTextureArray.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyStaticTextureArray.kt
@@ -16,6 +16,7 @@ package de.bixilon.minosoft.gui.rendering.system.dummy.texture
 import de.bixilon.kutil.collections.CollectionUtil.synchronizedMapOf
 import de.bixilon.kutil.latch.CountUpAndDownLatch
 import de.bixilon.minosoft.data.registries.ResourceLocation
+import de.bixilon.minosoft.gui.rendering.system.base.RenderSystem
 import de.bixilon.minosoft.gui.rendering.system.base.shader.NativeShader
 import de.bixilon.minosoft.gui.rendering.system.base.texture.SpriteAnimator
 import de.bixilon.minosoft.gui.rendering.system.base.texture.StaticTextureArray
@@ -23,10 +24,9 @@ import de.bixilon.minosoft.gui.rendering.system.base.texture.TextureArrayStates
 import de.bixilon.minosoft.gui.rendering.system.base.texture.TextureStates
 import de.bixilon.minosoft.gui.rendering.system.base.texture.texture.AbstractTexture
 
-class DummyStaticTextureArray : StaticTextureArray {
+class DummyStaticTextureArray(renderSystem: RenderSystem) : StaticTextureArray {
     override val textures: MutableMap<ResourceLocation, AbstractTexture> = synchronizedMapOf()
-    override val animator: SpriteAnimator
-        get() = TODO("Not yet implemented")
+    override val animator: SpriteAnimator = SpriteAnimator(renderSystem)
     override val state: TextureArrayStates = TextureArrayStates.DECLARED
 
     override fun createTexture(resourceLocation: ResourceLocation, mipmaps: Boolean, default: () -> AbstractTexture): AbstractTexture {
@@ -40,6 +40,7 @@ class DummyStaticTextureArray : StaticTextureArray {
     }
 
     override fun load(latch: CountUpAndDownLatch) {
+        animator.init()
     }
 
     override fun activate() {
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyTextureManager.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyTextureManager.kt
index 78640da06..79fda1fa5 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyTextureManager.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/dummy/texture/DummyTextureManager.kt
@@ -20,5 +20,5 @@ import de.bixilon.minosoft.gui.rendering.system.base.texture.dynamic.DynamicText
 
 class DummyTextureManager(val context: RenderWindow) : TextureManager() {
     override val dynamicTextures: DynamicTextureArray = DummyDynamicTextureArray()
-    override val staticTextures: StaticTextureArray = DummyStaticTextureArray()
+    override val staticTextures: StaticTextureArray = DummyStaticTextureArray(context.renderSystem)
 }
diff --git a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/window/dummy/DummyWindow.kt b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/window/dummy/DummyWindow.kt
index 40a79d2ac..a27057401 100644
--- a/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/window/dummy/DummyWindow.kt
+++ b/src/integration-test/kotlin/de/bixilon/minosoft/gui/rendering/system/window/dummy/DummyWindow.kt
@@ -14,6 +14,7 @@
 package de.bixilon.minosoft.gui.rendering.system.window.dummy
 
 import de.bixilon.kotlinglm.vec2.Vec2i
+import de.bixilon.kutil.observer.DataObserver.Companion.observed
 import de.bixilon.kutil.time.TimeUtil
 import de.bixilon.minosoft.gui.rendering.system.window.BaseWindow
 import de.bixilon.minosoft.gui.rendering.system.window.CursorModes
@@ -35,8 +36,8 @@ class DummyWindow : BaseWindow {
     override var title: String = ""
     override val version: String = "dummy"
     override val time: Double get() = TimeUtil.millis() / 1000.0
-    override val iconified: Boolean = false
-    override val focused: Boolean = false
+    override val iconified: Boolean by observed(false)
+    override val focused: Boolean by observed(false)
 
     override fun destroy() = Unit