diff --git a/mailer/template_test.go b/mailer/template_test.go
new file mode 100644
index 0000000..fee3d15
--- /dev/null
+++ b/mailer/template_test.go
@@ -0,0 +1,39 @@
+package mailer
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTemplate(t *testing.T) {
+	assert := assert.New(t)
+
+	value := struct {
+		T string
+	}{
+		T: "<script>alert('you have been pwned')</script>",
+	}
+
+	templ := TemplateTXT("A {{ .T }")
+	// invalid template
+	assert.Nil(templ)
+
+	templ = TemplateTXT("A {{ .T }}")
+	// text template
+	assert.Equal("", templ.Render(3))
+
+	// text template
+	assert.Equal("A <script>alert('you have been pwned')</script>", templ.Render(&value))
+
+	templ = TemplateHTML("A {{ .T }")
+	// invalid template
+	assert.Nil(templ)
+
+	templ = TemplateHTML("A {{ .T }}")
+	// html template
+	assert.Equal("", templ.Render(3))
+
+	// html template
+	assert.Equal("A &lt;script&gt;alert(&#39;you have been pwned&#39;)&lt;/script&gt;", templ.Render(&value))
+}