diff --git a/lib/grading/test_threads.c b/lib/grading/test_threads.c
index dfa3d5c..1f1c4f5 100644
--- a/lib/grading/test_threads.c
+++ b/lib/grading/test_threads.c
@@ -2,12 +2,16 @@
 #include <test_helper.h>
 #include <spawn/spawn.h>
 
+#define PROCESS_COUNT 100
+
 void do_test_threads(void) {
     debug_printf("[do_test_threads]\n");
 
-    struct spawninfo *si = malloc(sizeof(struct spawninfo));
-    domainid_t *pid = malloc(sizeof(domainid_t));
+    struct spawninfo *si = malloc(PROCESS_COUNT * sizeof(struct spawninfo));
+    domainid_t *pid = malloc(PROCESS_COUNT * sizeof(domainid_t));
 
-    CHECK_ERR(spawn_load_by_name("mallocator", si, pid));
+    for(uint i = 0; i < PROCESS_COUNT; ++i) {
+        debug_printf("TEST_THREADS: spawn %u\n", i);
+        CHECK_ERR(spawn_load_by_name("mallocator", &(si[i]), &(pid[i])));
+    }
 }
-
diff --git a/usr/mallocator/main.c b/usr/mallocator/main.c
index 5f38b2c..4a7f459 100644
--- a/usr/mallocator/main.c
+++ b/usr/mallocator/main.c
@@ -26,8 +26,8 @@ int main(int argc, char *argv[])
     //allocate a 256 MiB buffer
     char * big_buf = malloc(1<<28);
     big_buf[0] = 'a';
-    for (int i = 0; i < (1 << 14); i += 4096) {
-        printf("%x\n", i);
+    for (int i = 0; i < (1 << 16); i += 4096) {
+        debug_printf("%x\n", i);
         big_buf[i] = 'b';
     }
 }
\ No newline at end of file