diff --git a/tests/libtest/lib1513.c b/tests/libtest/lib1513.c
index 545bf90abe..0584dd9991 100644
--- a/tests/libtest/lib1513.c
+++ b/tests/libtest/lib1513.c
@@ -57,11 +57,11 @@ static CURLcode test_lib1513(char *URL)
   easy_init(curl);
 
   easy_setopt(curl, CURLOPT_URL, URL);
-  easy_setopt(curl, CURLOPT_TIMEOUT, (long)7);
-  easy_setopt(curl, CURLOPT_NOSIGNAL, (long)1);
+  easy_setopt(curl, CURLOPT_TIMEOUT, 7L);
+  easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
   easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progressKiller);
   easy_setopt(curl, CURLOPT_PROGRESSDATA, NULL);
-  easy_setopt(curl, CURLOPT_NOPROGRESS, (long)0);
+  easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
 
   res = curl_easy_perform(curl);
 
diff --git a/tests/libtest/lib1555.c b/tests/libtest/lib1555.c
index 39c9ad5cb9..51692fab67 100644
--- a/tests/libtest/lib1555.c
+++ b/tests/libtest/lib1555.c
@@ -62,11 +62,11 @@ static CURLcode test_lib1555(char *URL)
   easy_init(t1555_curl);
 
   easy_setopt(t1555_curl, CURLOPT_URL, URL);
-  easy_setopt(t1555_curl, CURLOPT_TIMEOUT, (long)7);
-  easy_setopt(t1555_curl, CURLOPT_NOSIGNAL, (long)1);
+  easy_setopt(t1555_curl, CURLOPT_TIMEOUT, 7L);
+  easy_setopt(t1555_curl, CURLOPT_NOSIGNAL, 1L);
   easy_setopt(t1555_curl, CURLOPT_PROGRESSFUNCTION, progressCallback);
   easy_setopt(t1555_curl, CURLOPT_PROGRESSDATA, NULL);
-  easy_setopt(t1555_curl, CURLOPT_NOPROGRESS, (long)0);
+  easy_setopt(t1555_curl, CURLOPT_NOPROGRESS, 0L);
 
   res = curl_easy_perform(t1555_curl);
 
diff --git a/tests/libtest/lib2502.c b/tests/libtest/lib2502.c
index fde4283972..af31ce3936 100644
--- a/tests/libtest/lib2502.c
+++ b/tests/libtest/lib2502.c
@@ -70,7 +70,7 @@ static CURLcode test_lib2502(char *URL)
     easy_setopt(curl[i], CURLOPT_URL, target_url);
     /* go http2 */
     easy_setopt(curl[i], CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_3ONLY);
-    easy_setopt(curl[i], CURLOPT_CONNECTTIMEOUT_MS, (long)5000);
+    easy_setopt(curl[i], CURLOPT_CONNECTTIMEOUT_MS, 5000L);
     easy_setopt(curl[i], CURLOPT_CAINFO, libtest_arg4);
     /* wait for first connection established to see if we can share it */
     easy_setopt(curl[i], CURLOPT_PIPEWAIT, 1L);
diff --git a/tests/libtest/lib583.c b/tests/libtest/lib583.c
index a68105ea47..07e0e4ac45 100644
--- a/tests/libtest/lib583.c
+++ b/tests/libtest/lib583.c
@@ -54,7 +54,7 @@ static CURLcode test_lib583(char *URL)
   easy_setopt(curl, CURLOPT_VERBOSE, 1L);
 
   easy_setopt(curl, CURLOPT_URL, URL);
-  easy_setopt(curl, CURLOPT_INFILESIZE, (long)5);
+  easy_setopt(curl, CURLOPT_INFILESIZE, 5L);
 
   multi_add_handle(multiHandle, curl);