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diff --git a/browser/components/newtab/test/unit/asrouter/templates/NewsletterSnippet.test.jsx b/browser/components/newtab/test/unit/asrouter/templates/NewsletterSnippet.test.jsx
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+++ b/browser/components/newtab/test/unit/asrouter/templates/NewsletterSnippet.test.jsx
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+import { mount } from "enzyme";
+import { NewsletterSnippet } from "content-src/asrouter/templates/NewsletterSnippet/NewsletterSnippet";
+import React from "react";
+import schema from "content-src/asrouter/templates/NewsletterSnippet/NewsletterSnippet.schema.json";
+import { SnippetsTestMessageProvider } from "lib/SnippetsTestMessageProvider.jsm";
+
+describe("NewsletterSnippet", () => {
+  let sandbox;
+  let DEFAULT_CONTENT;
+
+  function mountAndCheckProps(content = {}) {
+    const props = {
+      id: "foo123",
+      content: Object.assign({}, DEFAULT_CONTENT, content),
+      onBlock() {},
+      onDismiss: sandbox.stub(),
+      sendUserActionTelemetry: sandbox.stub(),
+      onAction: sandbox.stub(),
+    };
+    const comp = mount(<NewsletterSnippet {...props} />);
+    // Check schema with the final props the component receives (including defaults)
+    assert.jsonSchema(comp.children().get(0).props.content, schema);
+    return comp;
+  }
+
+  beforeEach(async () => {
+    sandbox = sinon.createSandbox();
+    DEFAULT_CONTENT = (await SnippetsTestMessageProvider.getMessages()).find(
+      msg => msg.template === "newsletter_snippet"
+    ).content;
+  });
+  afterEach(() => {
+    sandbox.restore();
+  });
+
+  describe("schema test", () => {
+    it("should validate the schema and defaults", () => {
+      const wrapper = mountAndCheckProps();
+      wrapper.find(".ASRouterButton").simulate("click");
+      assert.equal(wrapper.find(".mainInput").instance().type, "email");
+    });
+
+    it("should have all of the default fields", () => {
+      const defaults = {
+        id: "foo123",
+        content: {},
+        onBlock() {},
+        onDismiss: sandbox.stub(),
+        sendUserActionTelemetry: sandbox.stub(),
+        onAction: sandbox.stub(),
+      };
+      const wrapper = mount(<NewsletterSnippet {...defaults} />);
+      // NewsletterSnippet is a wrapper around SubmitFormSnippet
+      const { props } = wrapper.children().get(0);
+
+      // the `locale` properties gets used as part of hidden_fields so we
+      // check for it separately
+      const properties = { ...schema.properties };
+      const { locale } = properties;
+      delete properties.locale;
+
+      const defaultProperties = Object.keys(properties).filter(
+        prop => properties[prop].default
+      );
+      assert.lengthOf(defaultProperties, 6);
+      defaultProperties.forEach(prop =>
+        assert.propertyVal(props.content, prop, properties[prop].default)
+      );
+
+      const defaultHiddenProperties = Object.keys(
+        schema.properties.hidden_inputs.properties
+      ).filter(
+        prop => schema.properties.hidden_inputs.properties[prop].default
+      );
+      assert.lengthOf(defaultHiddenProperties, 1);
+      defaultHiddenProperties.forEach(prop =>
+        assert.propertyVal(
+          props.content.hidden_inputs,
+          prop,
+          schema.properties.hidden_inputs.properties[prop].default
+        )
+      );
+      assert.propertyVal(props.content.hidden_inputs, "lang", locale.default);
+    });
+  });
+});