diff --git a/progs/tests/zreaddraw.c b/progs/tests/zreaddraw.c
index e2dacbf..a03b681 100644
--- a/progs/tests/zreaddraw.c
+++ b/progs/tests/zreaddraw.c
@@ -44,16 +44,8 @@ static void Display(void)
    }
    printf("Depth value range: [%f, %f]\n", min, max);
 
-   /* draw depth image with scaling (into z buffer) */
-   glPixelZoom(4.0, 4.0);
    glWindowPos2i(100, 0);
-   glDrawPixels(100, 100, GL_DEPTH_COMPONENT, GL_FLOAT, depth);
-
-   /* read back scaled depth image */
-   glReadPixels(100, 0, 400, 400, GL_DEPTH_COMPONENT, GL_FLOAT, depth2);
-   /* draw as luminance */
-   glPixelZoom(1.0, 1.0);
-   glDrawPixels(400, 400, GL_LUMINANCE, GL_FLOAT, depth2);
+   glDrawPixels(100, 100, GL_LUMINANCE, GL_FLOAT, depth);
 
    glutSwapBuffers();
 }