diff --git a/certbot-compatibility-test/nginx/nginx-roundtrip-testdata/anothermapcase/nginx.conf b/certbot-compatibility-test/nginx/nginx-roundtrip-testdata/anothermapcase/nginx.conf
new file mode 100644
index 000000000..b3ca02f92
--- /dev/null
+++ b/certbot-compatibility-test/nginx/nginx-roundtrip-testdata/anothermapcase/nginx.conf
@@ -0,0 +1,3 @@
+map $uri $blogname{
+    ~^(?P<blogpath>/[^/]+/)files/(.*)       $blogpath ;
+}