diff --git a/tests/data/test696 b/tests/data/test696
index 8862b163f2..c0c316111d 100644
--- a/tests/data/test696
+++ b/tests/data/test696
@@ -55,10 +55,10 @@ Connection: close
 -foo-
 </stdout>
 <protocol crlf="yes">
-GET /556 HTTP/1.1
+GET /%TESTNUMBER HTTP/1.1
 Host: ninja
 
-GET /556 HTTP/1.1
+GET /%TESTNUMBER HTTP/1.1
 Host: ninja
 
 </protocol>
diff --git a/tests/libtest/lib556.c b/tests/libtest/lib556.c
index 8239d26034..78b89975e8 100644
--- a/tests/libtest/lib556.c
+++ b/tests/libtest/lib556.c
@@ -53,13 +53,15 @@ again:
 
   if(!res) {
     /* we are connected, now get an HTTP document the raw way */
-    static const char *request =
-      "GET /556 HTTP/1.1\r\n"
-      "Host: ninja\r\n\r\n";
+    char request[64];
     const char *sbuf = request;
-    size_t sblen = strlen(request);
+    size_t sblen;
     size_t nwritten = 0, nread = 0;
 
+    sblen = curl_msnprintf(request, sizeof(request),
+                           "GET /%d HTTP/1.1\r\n"
+                           "Host: ninja\r\n\r\n", testnum);
+
     do {
       char buf[1024];