diff --git a/tests/libtest/cli_h2_serverpush.c b/tests/libtest/cli_h2_serverpush.c
index a58f38dd0a..7b465bc61a 100644
--- a/tests/libtest/cli_h2_serverpush.c
+++ b/tests/libtest/cli_h2_serverpush.c
@@ -68,7 +68,7 @@ static int server_push_callback(CURL *parent,
   static unsigned int count = 0;
   int rv;
 
-  (void)parent; /* we have no use for this */
+  (void)parent;
   curl_msnprintf(filename, sizeof(filename) - 1, "push%u", count++);
 
   /* here's a new stream, save it in a new file for each new push */
diff --git a/tests/libtest/lib1512.c b/tests/libtest/lib1512.c
index 6e6287dbfc..dd80163d43 100644
--- a/tests/libtest/lib1512.c
+++ b/tests/libtest/lib1512.c
@@ -42,7 +42,7 @@ static CURLcode test_lib1512(const char *URL)
   struct curl_slist *slist = NULL;
   size_t i;
   char target_url[256];
-  (void)URL; /* URL is setup in the code */
+  (void)URL;
 
   if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
     curl_mfprintf(stderr, "curl_global_init() failed\n");
diff --git a/tests/libtest/lib1537.c b/tests/libtest/lib1537.c
index 52272cb2ec..cb35fb1908 100644
--- a/tests/libtest/lib1537.c
+++ b/tests/libtest/lib1537.c
@@ -35,7 +35,7 @@ static CURLcode test_lib1537(const char *URL)
   int outlen = 0;
   char *raw;
 
-  (void)URL; /* we don't use this */
+  (void)URL;
 
   if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
     curl_mfprintf(stderr, "curl_global_init() failed\n");
diff --git a/tests/libtest/lib501.c b/tests/libtest/lib501.c
index d32e4397b8..d761c8a636 100644
--- a/tests/libtest/lib501.c
+++ b/tests/libtest/lib501.c
@@ -30,7 +30,7 @@ static CURLcode test_lib501(const char *URL)
   CURLcode res;
   CURL *curl;
 
-  (void)URL; /* we don't use this */
+  (void)URL;
 
   if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
     curl_mfprintf(stderr, "curl_global_init() failed\n");
diff --git a/tests/libtest/lib558.c b/tests/libtest/lib558.c
index 795a0b74b3..c82b6ee969 100644
--- a/tests/libtest/lib558.c
+++ b/tests/libtest/lib558.c
@@ -33,7 +33,7 @@ static CURLcode test_lib558(const char *URL)
   char *ptr = NULL;
   int asize;
 
-  (void)URL; /* we don't use this */
+  (void)URL;
 
   if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
     curl_mfprintf(stderr, "curl_global_init() failed\n");