diff --git a/tests/libtest/lib547.c b/tests/libtest/lib547.c
index 68b8cdc575..9099b458c9 100644
--- a/tests/libtest/lib547.c
+++ b/tests/libtest/lib547.c
@@ -103,7 +103,7 @@ static CURLcode test_lib547(char *URL)
   test_setopt(curl, CURLOPT_PROXY, libtest_arg2);
   test_setopt(curl, CURLOPT_PROXYUSERPWD, libtest_arg3);
   test_setopt(curl, CURLOPT_PROXYAUTH,
-              (CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM));
+              CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM);
 
   res = curl_easy_perform(curl);
 
diff --git a/tests/libtest/lib555.c b/tests/libtest/lib555.c
index 6b201d3b07..a71df17714 100644
--- a/tests/libtest/lib555.c
+++ b/tests/libtest/lib555.c
@@ -99,7 +99,7 @@ static CURLcode test_lib555(char *URL)
   easy_setopt(curl, CURLOPT_PROXY, libtest_arg2);
   easy_setopt(curl, CURLOPT_PROXYUSERPWD, libtest_arg3);
   easy_setopt(curl, CURLOPT_PROXYAUTH,
-              (CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM));
+              CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM);
 
   multi_init(m);
 
diff --git a/tests/libtest/lib590.c b/tests/libtest/lib590.c
index 15daa3a2bf..d11f7fc09c 100644
--- a/tests/libtest/lib590.c
+++ b/tests/libtest/lib590.c
@@ -29,10 +29,11 @@
 
   It is reproducible by the following steps:
 
-  - Use a proxy that offers NTLM and Negotiate ( CURLOPT_PROXY and
-  CURLOPT_PROXYPORT)
-  - Tell libcurl NOT to use Negotiate  CURL_EASY_SETOPT(CURLOPT_PROXYAUTH,
-  CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM)
+  - Use a proxy that offers NTLM and Negotiate
+    (CURLOPT_PROXY and CURLOPT_PROXYPORT)
+  - Tell libcurl NOT to use Negotiate
+    curl_easy_setopt(CURLOPT_PROXYAUTH,
+                     CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM)
   - Start the request
 */
 
@@ -59,7 +60,7 @@ static CURLcode test_lib590(char *URL)
   test_setopt(curl, CURLOPT_URL, URL);
   test_setopt(curl, CURLOPT_HEADER, 1L);
   test_setopt(curl, CURLOPT_PROXYAUTH,
-              (CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM));
+              CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM);
   test_setopt(curl, CURLOPT_PROXY, libtest_arg2); /* set in first.c */
 
   /* set the name + password twice to test that the API is fine with it */
diff --git a/tests/libtest/lib694.c b/tests/libtest/lib694.c
index b4faee1293..e637946c96 100644
--- a/tests/libtest/lib694.c
+++ b/tests/libtest/lib694.c
@@ -48,7 +48,7 @@ static CURLcode test_lib694(char *URL)
   test_setopt(curl, CURLOPT_HEADER, 1L);
   test_setopt(curl, CURLOPT_VERBOSE, 1L);
   test_setopt(curl, CURLOPT_HTTPAUTH,
-              (CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM));
+              CURLAUTH_BASIC | CURLAUTH_DIGEST | CURLAUTH_NTLM);
   test_setopt(curl, CURLOPT_USERPWD, "me:password");
 
   do {