diff --git a/content-security-policy/generic/src-trailing-dot.sub.any.js b/content-security-policy/generic/src-trailing-dot.sub.any.js
new file mode 100644
index 00000000000000..f2b45a6957c6c4
--- /dev/null
+++ b/content-security-policy/generic/src-trailing-dot.sub.any.js
@@ -0,0 +1,6 @@
+// META: global=window,worker
+
+promise_test(t => {
+    return fetch("{{location[scheme]}}://{{host}}.:{{location[port]}}"
+        + "/content-security-policy/support/resource.py");
+}, "Fetch from host with trailing dot should be allowed by CSP.");
diff --git a/content-security-policy/generic/src-trailing-dot.sub.any.js.sub.headers b/content-security-policy/generic/src-trailing-dot.sub.any.js.sub.headers
new file mode 100644
index 00000000000000..4a8ad9c0f5438f
--- /dev/null
+++ b/content-security-policy/generic/src-trailing-dot.sub.any.js.sub.headers
@@ -0,0 +1 @@
+Content-Security-Policy: connect-src {{location[scheme]}}://{{host}}.:{{location[port]}}
\ No newline at end of file