diff --git a/tests/11_test_spa.test.ts b/tests/11_test_spa.test.ts
index b569dab..b8c7301 100644
--- a/tests/11_test_spa.test.ts
+++ b/tests/11_test_spa.test.ts
@@ -27,6 +27,7 @@ Deno.test({
 				asserts.assert(response.ok);
 				asserts.assert(body);
 				asserts.assertMatch(body, /SPA PAGE/s);
+				asserts.assertMatch(body, /test include/s);
 			}
 
 			{
diff --git a/tests/www/spa/index.html b/tests/www/spa/index.html
index 6a697d3..6d29980 100644
--- a/tests/www/spa/index.html
+++ b/tests/www/spa/index.html
@@ -2,5 +2,6 @@
 <html>
 	<body>
 		<h1>SPA PAGE</h1>
+		<!-- #include file="./test_include.html" -->
 	</body>
 </html>
diff --git a/tests/www/spa/test_include.html b/tests/www/spa/test_include.html
new file mode 100644
index 0000000..4d423b8
--- /dev/null
+++ b/tests/www/spa/test_include.html
@@ -0,0 +1 @@
+<h2>test include</h2>
