diff --git a/tests/gui/components/modal.spec.js b/tests/gui/components/modal.spec.js
new file mode 100644
index 00000000..7880e15b
--- /dev/null
+++ b/tests/gui/components/modal.spec.js
@@ -0,0 +1,40 @@
+
+const m = require('mochainon')
+
+describe('Browser: Modal', function () {
+  beforeEach(angular.mock.module(
+    require('../../../lib/gui/app/components/modal/modal')
+  ))
+
+  describe('ModalService', function () {
+    let ModalService
+
+    beforeEach(angular.mock.inject(function (_ModalService_) {
+      ModalService = _ModalService_
+    }))
+
+    describe('.open()', function () {
+      it('should not emit any errors when the template is a non-empty string', function () {
+        m.chai.expect(function () {
+          ModalService.open({
+            template: '<div>{{ \'Hello\' }}, World!</div>'
+          })
+        }).to.not.throw()
+      })
+
+      it('should emit error on no template field', function () {
+        m.chai.expect(function () {
+          ModalService.open({})
+        }).to.throw('One of component or template or templateUrl options is required.')
+      })
+
+      it('should emit error on empty string template', function () {
+        m.chai.expect(function () {
+          ModalService.open({
+            template: ''
+          })
+        }).to.throw('One of component or template or templateUrl options is required.')
+      })
+    })
+  })
+})