diff --git a/test/TransformationTest.js b/test/TransformationTest.js
index 26aae61..b8363c8 100644
--- a/test/TransformationTest.js
+++ b/test/TransformationTest.js
@@ -85,4 +85,16 @@ describe("Transformation", () => {
       "http://res.cloudinary.com/demo/image/upload/l_text:arial_20_antialias_best_hinting_medium:Cloudinary%20features/sample"
     );
   });
+  it("should not change variable names even if they are keywords", function () {
+    let tag = shallow(
+      <Image publicId="sample" cloudName="demo">
+        <Transformation variables={[["$width", 10]]}/>
+        <Transformation width="$width + 10 + width" crop="scale"/>
+      </Image>
+    );
+    expect(tag.name()).to.equal("img");
+    expect(tag.state("url")).to.equal(
+      "http://res.cloudinary.com/demo/image/upload/$width_10/c_scale,w_$width_add_10_add_w/sample"
+    );
+  });
 });