diff --git a/tests/CircleShapeTest.php b/tests/CircleShapeTest.php
index 02c77694..71b40d23 100644
--- a/tests/CircleShapeTest.php
+++ b/tests/CircleShapeTest.php
@@ -14,7 +14,7 @@ class CircleShapeTest extends PHPUnit_Framework_TestCase
     {
         $circle = new CircleGd(250);
         $this->assertInstanceOf('Intervention\Image\Gd\Shapes\CircleShape', $circle);
-        $this->assertEquals(250, $circle->radius);
+        $this->assertEquals(250, $circle->diameter);
         
     }
 
diff --git a/tests/GdSystemTest.php b/tests/GdSystemTest.php
index a64bc40c..950aa3a9 100644
--- a/tests/GdSystemTest.php
+++ b/tests/GdSystemTest.php
@@ -1065,14 +1065,14 @@ class GdSystemTest extends PHPUnit_Framework_TestCase
     {
         $img = $this->manager()->canvas(16, 16, 'ffffff');
         $img->ellipse(12, 8, 8, 8, function ($draw) { $draw->background('#ff0000'); $draw->border(1, '#0000ff'); });
-        $this->assertEquals('d56363fd454ad6e25a23c2a4a7c77998', $img->checksum());
+        $this->assertEquals('080d9dd92ebe22f976c3c703cba33510', $img->checksum());
     }
 
     public function testCircleImage()
     {
         $img = $this->manager()->canvas(16, 16, 'ffffff');
         $img->circle(12, 8, 8, function ($draw) { $draw->background('#ff0000'); $draw->border(1, '#0000ff'); });
-        $this->assertEquals('c214f58de03d171f7f278a7b957bab50', $img->checksum());
+        $this->assertEquals('c3bff06c20244ba14e898e39ea0efd76', $img->checksum());
     }
 
     public function testPolygonImage()
diff --git a/tests/tmp/crc.png b/tests/tmp/crc.png
new file mode 100644
index 00000000..91988606
Binary files /dev/null and b/tests/tmp/crc.png differ