diff --git a/tests/design.test.js b/tests/design.test.js
new file mode 100644
index 00000000000..5b68c14cc22
--- /dev/null
+++ b/tests/design.test.js
@@ -0,0 +1,63 @@
+let expect = require("chai").expect;
+let freesewing = require("./dist/index.js");
+
+it("Design constructor should return pattern constructor", () => {
+  let design = new freesewing.Design({
+    foo: "bar",
+    options: {
+      constant: 2,
+      percentage: { pct: 30, min: 0, max: 100 }
+    }
+  });
+
+  let pattern = new design();
+  expect(pattern.width).to.equal(0);
+  expect(pattern.height).to.equal(0);
+  expect(pattern.settings.complete).to.equal(true);
+  expect(pattern.parts).to.eql({});
+  expect(pattern.settings.units).to.equal("metric");
+  expect(pattern.config.foo).to.equal("bar");
+  expect(pattern.settings.options.constant).to.equal(2);
+  expect(pattern.settings.options.percentage).to.equal(0.3);
+});
+
+it("Design constructor should load single plugin", () => {
+  let plugin = {
+    name: "example",
+    version: 1,
+    hooks: {
+      preRender: function(svg, attributes) {
+        svg.attributes.add("freesewing:plugin-example", version);
+      }
+    }
+  };
+
+  let design = new freesewing.Design({}, plugin);
+  let pattern = new design();
+  expect(pattern.hooks.preRender.length).to.equal(1);
+});
+
+it("Design constructor should load array of plugins", () => {
+  let plugin1 = {
+    name: "example1",
+    version: 1,
+    hooks: {
+      preRender: function(svg, attributes) {
+        svg.attributes.add("freesewing:plugin-example1", version);
+      }
+    }
+  };
+  let plugin2 = {
+    name: "example2",
+    version: 2,
+    hooks: {
+      preRender: function(svg, attributes) {
+        svg.attributes.add("freesewing:plugin-example2", version);
+      }
+    }
+  };
+
+  let design = new freesewing.Design({}, [plugin1, plugin2]);
+  let pattern = new design();
+  expect(pattern.hooks.preRender.length).to.equal(2);
+});