diff --git a/jme3-examples/src/main/java/jme3test/material/TestGeometryShader.java b/jme3-examples/src/main/java/jme3test/material/TestGeometryShader.java
index 04c8223f1..0199d70cc 100644
--- a/jme3-examples/src/main/java/jme3test/material/TestGeometryShader.java
+++ b/jme3-examples/src/main/java/jme3test/material/TestGeometryShader.java
@@ -8,6 +8,7 @@ import com.jme3.scene.Geometry;
 import com.jme3.scene.Mesh;
 import com.jme3.scene.VertexBuffer;
 import com.jme3.scene.shape.Sphere;
+import com.jme3.system.AppSettings;
 import com.jme3.util.BufferUtils;
 
 /**
@@ -37,6 +38,9 @@ public class TestGeometryShader extends SimpleApplication {
 
     public static void main(String[] args) {
         TestGeometryShader app = new TestGeometryShader();
+        AppSettings settings = new AppSettings(true);
+        settings.setRenderer(AppSettings.LWJGL_OPENGL33);
+        app.setSettings(settings);
         app.start();
     }
 }
diff --git a/jme3-examples/src/main/java/jme3test/material/TestTessellationShader.java b/jme3-examples/src/main/java/jme3test/material/TestTessellationShader.java
index dbf93811f..576b79392 100644
--- a/jme3-examples/src/main/java/jme3test/material/TestTessellationShader.java
+++ b/jme3-examples/src/main/java/jme3test/material/TestTessellationShader.java
@@ -9,6 +9,7 @@ import com.jme3.scene.Geometry;
 import com.jme3.scene.Mesh;
 import com.jme3.scene.VertexBuffer;
 import com.jme3.scene.shape.Quad;
+import com.jme3.system.AppSettings;
 import com.jme3.util.BufferUtils;
 
 import java.util.concurrent.Callable;
@@ -63,6 +64,10 @@ public class TestTessellationShader extends SimpleApplication {
     }
 
     public static void main(String[] args) {
-        new TestTessellationShader().start();
+        TestTessellationShader app = new TestTessellationShader();
+        AppSettings settings = new AppSettings(true);
+        settings.setRenderer(AppSettings.LWJGL_OPENGL40);
+        app.setSettings(settings);
+        app.start();
     }
 }