diff --git a/tests/libtest/lib536.c b/tests/libtest/lib536.c
index 53439c797..2e7874051 100644
--- a/tests/libtest/lib536.c
+++ b/tests/libtest/lib536.c
@@ -18,71 +18,71 @@ static CURLMcode perform(CURLM * multi);
 
 static CURLMcode perform(CURLM * multi)
 {
-	int handles, maxfd;
-	CURLMcode code;
-	fd_set fdread, fdwrite, fdexcep;
-	int loop;
+  int handles, maxfd;
+  CURLMcode code;
+  fd_set fdread, fdwrite, fdexcep;
+  int loop;
 
-	for (loop=40;loop>0;loop--) {
-		code = curl_multi_perform(multi, &handles);
-		if (handles <= 0)
-			return CURLM_OK;
+  for (loop=40;loop>0;loop--) {
+    code = curl_multi_perform(multi, &handles);
+    if (handles <= 0)
+      return CURLM_OK;
 
-		switch (code) {
-		case CURLM_OK:
-			break;
-		case CURLM_CALL_MULTI_PERFORM:
-			continue;
-		default:
-			return code;
-		}
+    switch (code) {
+      case CURLM_OK:
+        break;
+      case CURLM_CALL_MULTI_PERFORM:
+        continue;
+      default:
+        return code;
+    }
 
-		FD_ZERO(&fdread);
-		FD_ZERO(&fdwrite);
-		FD_ZERO(&fdexcep);
-		curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
-		if (maxfd < 0)
-			return (CURLMcode) ~CURLM_OK;
-		if (select(maxfd + 1, &fdread, &fdwrite, &fdexcep, 0) == -1)
-			return (CURLMcode) ~CURLM_OK;
-	}
-	if (loop <= 0) {
-		fprintf(stderr, "ABORTING TEST, since it seems "
-			"that it would have run forever.\n");
-		return (CURLMcode) ~CURLM_OK;
-	}
+    FD_ZERO(&fdread);
+    FD_ZERO(&fdwrite);
+    FD_ZERO(&fdexcep);
+    curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
+    if (maxfd < 0)
+      return (CURLMcode) ~CURLM_OK;
+    if (select(maxfd + 1, &fdread, &fdwrite, &fdexcep, 0) == -1)
+      return (CURLMcode) ~CURLM_OK;
+  }
+
+  /* We only reach this point if (loop <= 0) */
+  fprintf(stderr, "ABORTING TEST, since it seems "
+          "that it would have run forever.\n");
+  return (CURLMcode) ~CURLM_OK;
 }
 
 int test(char *URL)
 {
-	CURLM *multi = curl_multi_init();
-	CURL *easy = curl_easy_init();
+  CURLM *multi = curl_multi_init();
+  CURL *easy = curl_easy_init();
 
-        curl_multi_setopt(multi, CURLMOPT_PIPELINING, 1);
+  curl_multi_setopt(multi, CURLMOPT_PIPELINING, 1);
 
-	curl_easy_setopt(easy, CURLOPT_WRITEFUNCTION, fwrite);
-	curl_easy_setopt(easy, CURLOPT_FAILONERROR, 1);
-	curl_easy_setopt(easy, CURLOPT_URL, URL);
+  curl_easy_setopt(easy, CURLOPT_WRITEFUNCTION, fwrite);
+  curl_easy_setopt(easy, CURLOPT_FAILONERROR, 1);
+  curl_easy_setopt(easy, CURLOPT_URL, URL);
 
-	curl_multi_add_handle(multi, easy);
-	if (perform(multi) != CURLM_OK)
-		printf("retrieve 1 failed\n");
+  curl_multi_add_handle(multi, easy);
+  if (perform(multi) != CURLM_OK)
+    printf("retrieve 1 failed\n");
 
-	curl_multi_remove_handle(multi, easy);
-	curl_easy_reset(easy);
+  curl_multi_remove_handle(multi, easy);
+  curl_easy_reset(easy);
 
-	curl_easy_setopt(easy, CURLOPT_FAILONERROR, 1);
-	curl_easy_setopt(easy, CURLOPT_URL, arg2);
+  curl_easy_setopt(easy, CURLOPT_FAILONERROR, 1);
+  curl_easy_setopt(easy, CURLOPT_URL, arg2);
 
-	curl_multi_add_handle(multi, easy);
-	if (perform(multi) != CURLM_OK)
-		printf("retrieve 2 failed\n");
+  curl_multi_add_handle(multi, easy);
+  if (perform(multi) != CURLM_OK)
+    printf("retrieve 2 failed\n");
 
-	curl_multi_remove_handle(multi, easy);
-	curl_easy_cleanup(easy);
-	curl_multi_cleanup(multi);
+  curl_multi_remove_handle(multi, easy);
+  curl_easy_cleanup(easy);
+  curl_multi_cleanup(multi);
 
-	printf("Finished!\n");
+  printf("Finished!\n");
 
-	return 0;
+  return 0;
 }