diff --git a/tests/libtest/lib1560.c b/tests/libtest/lib1560.c
index caff664720..943d813619 100644
--- a/tests/libtest/lib1560.c
+++ b/tests/libtest/lib1560.c
@@ -2054,7 +2054,7 @@ static int huge(void)
     if(!rc) {
       curl_url_get(urlp, part[i], &partp, 0);
       if(!partp || strcmp(partp, &bigpart[1 - (i == 4)])) {
-        curl_mprintf("URL %d part %u: failure\n", i, part[i]);
+        curl_mprintf("URL %d part %d: failure\n", i, (int)part[i]);
         error++;
       }
       curl_free(partp);
diff --git a/tests/libtest/lib1918.c b/tests/libtest/lib1918.c
index cc6fe1949d..4932c1cfa6 100644
--- a/tests/libtest/lib1918.c
+++ b/tests/libtest/lib1918.c
@@ -37,12 +37,12 @@ static CURLcode test_lib1918(const char *URL)
       curl_easy_option_by_id(o->id);
 
     if(ename->id != o->id) {
-      curl_mprintf("name lookup id %u does not match %u\n",
-                   ename->id, o->id);
+      curl_mprintf("name lookup id %d does not match %d\n",
+                   (int)ename->id, (int)o->id);
     }
     else if(eid->id != o->id) {
-      curl_mprintf("ID lookup %u does not match %u\n",
-                   ename->id, o->id);
+      curl_mprintf("ID lookup %d does not match %d\n",
+                   (int)ename->id, (int)o->id);
     }
   }
   curl_global_cleanup();