diff --git a/tests/thread_float/main.c b/tests/thread_float/main.c
index 693e127dfafe8..336860ce4de05 100644
--- a/tests/thread_float/main.c
+++ b/tests/thread_float/main.c
@@ -46,11 +46,9 @@ static void timer_cb(void *arg)
 
 static void *thread1(void *arg)
 {
-    (void) arg;
-
     float f, init;
 
-    printf("THREAD %" PRIkernel_pid " start\n", thread_getpid());
+    printf("THREAD %s start\n", (const char *)arg);
 
     init = 1.0 * thread_getpid();
     f = init;
@@ -60,7 +58,7 @@ static void *thread1(void *arg)
             f = f + 1.0 / f;
         }
         mutex_lock(&lock);
-        printf("T(%" PRIkernel_pid "): %f\n", thread_getpid(), (double)f);
+        printf("%s: %f\n", (const char *)arg, (double)f);
         mutex_unlock(&lock);
         init += 1.0;
         f = init;
@@ -70,11 +68,9 @@ static void *thread1(void *arg)
 
 static void *thread2(void *arg)
 {
-    (void) arg;
-
     float f, init;
 
-    printf("THREAD %" PRIkernel_pid " start\n", thread_getpid());
+    printf("THREAD %s start\n", (const char *)arg);
 
     init = 1.0 * thread_getpid();
     f = init;
@@ -91,15 +87,18 @@ static void *thread2(void *arg)
 
 int main(void)
 {
+    const char *t1_name = "t1";
+    const char *t2_name = "t2";
+    const char *t3_name = "t3";
     p1 = thread_create(t1_stack, sizeof(t1_stack), THREAD_PRIORITY_MAIN + 1,
                        THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
-                       thread1, NULL, "nr1");
+                       thread1, (void *)t1_name, t1_name);
     p2 = thread_create(t2_stack, sizeof(t2_stack), THREAD_PRIORITY_MAIN + 1,
                        THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
-                       thread2, NULL, "nr2");
+                       thread2, (void *)t2_name, t2_name);
     p3 = thread_create(t3_stack, sizeof(t3_stack), THREAD_PRIORITY_MAIN + 1,
                        THREAD_CREATE_WOUT_YIELD | THREAD_CREATE_STACKTEST,
-                       thread1, NULL, "nr3");
+                       thread1, (void *)t3_name, t3_name);
     puts("THREADS CREATED\n");
 
     timer.callback = timer_cb;