diff --git a/pom.xml b/pom.xml
index 84c3922..fb626d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -54,6 +54,18 @@
       <version>4.12</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.powermock</groupId>
+      <artifactId>powermock-module-junit4</artifactId>
+      <version>1.7.4</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.powermock</groupId>
+      <artifactId>powermock-api-mockito</artifactId>
+      <version>1.7.4</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>
diff --git a/src/main/java/com/github/joonasvali/naturalmouse/support/ScreenAdjustedNature.java b/src/main/java/com/github/joonasvali/naturalmouse/support/ScreenAdjustedNature.java
index 115d856..cdddc72 100644
--- a/src/main/java/com/github/joonasvali/naturalmouse/support/ScreenAdjustedNature.java
+++ b/src/main/java/com/github/joonasvali/naturalmouse/support/ScreenAdjustedNature.java
@@ -23,9 +23,6 @@ public class ScreenAdjustedNature extends DefaultMouseMotionNature {
   public ScreenAdjustedNature(Dimension screenSize, Point mouseOffset) {
     this.screenSize = screenSize;
     this.offset = mouseOffset;
-    // Initial wrapping:
-    setMouseInfo(super.getMouseInfo());
-    setSystemCalls(super.getSystemCalls());
   }
 
   @Override
diff --git a/src/test/java/com/github/joonavali/naturalmouse/MouseMotionTestBase.java b/src/test/java/com/github/joonavali/naturalmouse/MouseMotionTestBase.java
index 6090cce..55e4bec 100644
--- a/src/test/java/com/github/joonavali/naturalmouse/MouseMotionTestBase.java
+++ b/src/test/java/com/github/joonavali/naturalmouse/MouseMotionTestBase.java
@@ -6,6 +6,8 @@ import com.github.joonasvali.naturalmouse.api.MouseMotionFactory;
 import com.github.joonasvali.naturalmouse.api.NoiseProvider;
 import com.github.joonasvali.naturalmouse.api.SpeedManager;
 import com.github.joonasvali.naturalmouse.api.SystemCalls;
+import com.github.joonasvali.naturalmouse.support.DefaultMouseInfoAccessor;
+import com.github.joonasvali.naturalmouse.support.DefaultSystemCalls;
 import com.github.joonasvali.naturalmouse.support.DoublePoint;
 import com.github.joonasvali.naturalmouse.support.Flow;
 import com.github.joonasvali.naturalmouse.util.Pair;
@@ -53,10 +55,11 @@ public class MouseMotionTestBase {
     Assert.assertEquals(y, pos.getY(), SMALL_DELTA);
   }
 
-  protected static class MockSystemCalls implements SystemCalls {
+  protected static class MockSystemCalls extends DefaultSystemCalls {
     private final MockMouse mockMouse;
 
     public MockSystemCalls(MockMouse mockMouse) {
+      super(null);
       this.mockMouse = mockMouse;
     }
 
@@ -109,7 +112,7 @@ public class MouseMotionTestBase {
     }
   }
 
-  protected static class MockMouse implements MouseInfoAccessor {
+  protected static class MockMouse extends DefaultMouseInfoAccessor {
     private final ArrayList<Point> mouseMovements = new ArrayList<>();
 
     MockMouse() {
diff --git a/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureDefaultsTest.java b/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureDefaultsTest.java
new file mode 100644
index 0000000..fe9454a
--- /dev/null
+++ b/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureDefaultsTest.java
@@ -0,0 +1,93 @@
+package com.github.joonavali.naturalmouse;
+
+import com.github.joonasvali.naturalmouse.api.MouseMotionFactory;
+import com.github.joonasvali.naturalmouse.api.SystemCalls;
+import com.github.joonasvali.naturalmouse.support.DefaultMouseInfoAccessor;
+import com.github.joonasvali.naturalmouse.support.DefaultMouseMotionNature;
+import com.github.joonasvali.naturalmouse.support.DefaultOvershootManager;
+import com.github.joonasvali.naturalmouse.support.DefaultSystemCalls;
+import com.github.joonasvali.naturalmouse.support.ScreenAdjustedNature;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.awt.*;
+import java.util.ArrayList;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.whenNew;
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest(DefaultMouseMotionNature.class)
+/**
+ * This should run same tests as ScreenAdjustedNatureTest with difference in setup.
+ * These tests verify that the offsets and dimensions are properly set when user does not explicitly
+ * set MouseInfoAccessor and SystemCalls, but rely on the default version in DefaultMouseMotionNature
+ */
+public class ScreenAdjustedNatureDefaultsTest {
+  private MouseMotionFactory factory;
+  private MouseMotionTestBase.MockMouse mouse;
+
+  @Before
+  public void setup() throws Exception {
+    mouse = new MouseMotionTestBase.MockMouse(60, 60);
+    DefaultSystemCalls mockSystemCalls = new MouseMotionTestBase.MockSystemCalls(mouse);
+    whenNew(DefaultSystemCalls.class).withAnyArguments().thenReturn(mockSystemCalls);
+    whenNew(DefaultMouseInfoAccessor.class).withAnyArguments().thenReturn(mouse);
+
+    // Mockito inserts the systemCalls and Mouse
+    factory = new MouseMotionFactory();
+    factory.setNature(new ScreenAdjustedNature(new Dimension(100, 100), new Point(50, 50)));
+    ((DefaultOvershootManager)factory.getOvershootManager()).setOvershoots(0);
+    factory.setNoiseProvider(new MouseMotionTestBase.MockNoiseProvider());
+    factory.setDeviationProvider(new MouseMotionTestBase.MockDeviationProvider());
+    factory.setSpeedManager(new MouseMotionTestBase.MockSpeedManager());
+    factory.setRandom(new MouseMotionTestBase.MockRandom());
+
+  }
+
+  @Test
+  public void testOffsetAppliesToMouseMovement() throws InterruptedException {
+    factory.move(50, 50);
+
+    ArrayList<Point> moves = mouse.getMouseMovements();
+    Assert.assertEquals(new Point(60, 60), moves.get(0));
+    Assert.assertEquals(new Point(100, 100), moves.get(moves.size() - 1));
+    Point lastPos = new Point(0, 0);
+    for (Point p : moves) {
+      Assert.assertTrue(lastPos.x +  " vs " + p.x, lastPos.x < p.x);
+      Assert.assertTrue(lastPos.y +  " vs " + p.y,lastPos.y < p.y);
+      lastPos = p;
+    }
+  }
+
+  @Test
+  public void testDimensionsLimitScreenOnLargeSide() throws InterruptedException {
+    // Arbitrary large movement attempt: (60, 60) -> (1060, 1060)
+    factory.move(1000, 1000);
+
+    ArrayList<Point> moves = mouse.getMouseMovements();
+    Assert.assertEquals(new Point(60, 60), moves.get(0));
+    // Expect the screen size to be only 100x100px, so it gets capped on 150, 150.
+    // But NaturalMouseMotion allows to move to screen length - 1, so it's [149, 149]
+    Assert.assertEquals(new Point(149, 149), moves.get(moves.size() - 1));
+  }
+
+  @Test
+  public void testOffsetLimitScreenOnSmallSide() throws InterruptedException {
+    // Try to move out of the specified screen
+    factory.move(-1, -1);
+
+    ArrayList<Point> moves = mouse.getMouseMovements();
+    Assert.assertEquals(new Point(60, 60), moves.get(0));
+    // Expect the offset to limit the mouse movement to 50, 50
+    Assert.assertEquals(new Point(50, 50), moves.get(moves.size() - 1));
+  }
+
+}
diff --git a/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureTest.java b/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureTest.java
index 7e5c120..1153498 100644
--- a/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureTest.java
+++ b/src/test/java/com/github/joonavali/naturalmouse/ScreenAdjustedNatureTest.java
@@ -37,7 +37,6 @@ public class ScreenAdjustedNatureTest {
     Assert.assertEquals(new Point(100, 100), moves.get(moves.size() - 1));
     Point lastPos = new Point(0, 0);
     for (Point p : moves) {
-      System.out.println(p);
       Assert.assertTrue(lastPos.x +  " vs " + p.x, lastPos.x < p.x);
       Assert.assertTrue(lastPos.y +  " vs " + p.y,lastPos.y < p.y);
       lastPos = p;