diff --git a/src/tests/core.rs b/src/tests/core.rs
index 10e183b2..8b9a972b 100644
--- a/src/tests/core.rs
+++ b/src/tests/core.rs
@@ -513,6 +513,22 @@ fn entities() {
     );
 }
 
+#[test]
+fn entities_ecs() {
+    html_opts!(
+        [parse.escaped_char_spans],
+        concat!(
+            "This is &, ©, ™, \\™, &xyz;, ≂̸.\n",
+            "\n",
+            "∞ ∞\n"
+        ),
+        concat!(
+            "<p>This is &amp;, ©, ™, &amp;trade;, &amp;xyz;, \u{2242}\u{338}.</p>\n",
+            "<p>∞ ∞</p>\n"
+        ),
+    );
+}
+
 #[test]
 fn links() {
     html(