diff --git a/generator/test-attribute-escaping/render_test.go b/generator/test-attribute-escaping/render_test.go
new file mode 100644
index 000000000..920acb347
--- /dev/null
+++ b/generator/test-attribute-escaping/render_test.go
@@ -0,0 +1,24 @@
+package testhtml
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+const expected = `<div>` +
+	`<a href="about:invalid#TemplFailedSanitizationURL"` +
+	`</div>`
+
+func TestHTML(t *testing.T) {
+	w := new(strings.Builder)
+	err := BasicTemplate(`javascript: alert("xss");`).Render(context.Background(), w)
+	if err != nil {
+		t.Errorf("failed to render: %v", err)
+	}
+	if diff := cmp.Diff(expected, w.String()); diff != "" {
+		t.Error(diff)
+	}
+}
diff --git a/generator/test-attribute-escaping/template.templ b/generator/test-attribute-escaping/template.templ
new file mode 100644
index 000000000..a2d86ca22
--- /dev/null
+++ b/generator/test-attribute-escaping/template.templ
@@ -0,0 +1,8 @@
+{% package testhtml %}
+
+{% templ BasicTemplate(url string) %}
+  <div>
+	  <a href={%= templ.URL(url) %}>{%= "text" %}</a>
+  </div>
+{% endtempl %}
+
diff --git a/generator/test-attribute-escaping/template_templ.go b/generator/test-attribute-escaping/template_templ.go
new file mode 100644
index 000000000..ee8352217
--- /dev/null
+++ b/generator/test-attribute-escaping/template_templ.go
@@ -0,0 +1,56 @@
+// Code generated by templ DO NOT EDIT.
+
+package testhtml
+
+import "github.com/a-h/templ"
+import "context"
+import "io"
+
+func BasicTemplate(url string) templ.Component {
+	return templ.ComponentFunc(func(ctx context.Context, w io.Writer) (err error) {
+		ctx, _ = templ.RenderedCSSClassesFromContext(ctx)
+		_, err = io.WriteString(w, "<div>")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, "<a")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, " href=")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, "\"")
+		if err != nil {
+			return err
+		}
+		var var_1 templ.SafeURL = templ.URL(url)
+		_, err = io.WriteString(w, templ.EscapeString(string(var_1)))
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, "\"")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, ">")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, templ.EscapeString("text"))
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, "</a>")
+		if err != nil {
+			return err
+		}
+		_, err = io.WriteString(w, "</div>")
+		if err != nil {
+			return err
+		}
+		return err
+	})
+}
+