diff --git a/src/main.c b/src/main.c
index d0b885151..e06582f09 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1319,11 +1319,11 @@ static int str2offset(curl_off_t *val, char *str)
   /* this is a duplicate of the function that is also used in libcurl */
   *val = curlx_strtoofft(str, NULL, 0);
 
-  if ((*val == LLONG_MAX || *val == LLONG_MIN) && errno == ERANGE)
+  if ((*val == LLONG_MAX || *val == LLONG_MIN) && ERRNO == ERANGE)
     return 1;
 #else
   *val = strtol(str, NULL, 0);
-  if ((*val == LONG_MIN || *val == LONG_MAX) && errno == ERANGE)
+  if ((*val == LONG_MIN || *val == LONG_MAX) && ERRNO == ERANGE)
     return 1;
 #endif
   return 0;
@@ -4621,6 +4621,7 @@ static int create_dir_hierarchy(char *outfile)
   char *outdup;
   char *dirbuildup;
   int result=0;
+  int error;
 
   outdup = strdup(outfile);
   dirbuildup = malloc(sizeof(char) * strlen(outfile));
@@ -4646,7 +4647,8 @@ static int create_dir_hierarchy(char *outfile)
       if (access(dirbuildup, F_OK) == -1) {
         result = mkdir(dirbuildup,(mode_t)0000750);
         if (-1 == result) {
-          switch (errno) {
+          error = ERRNO;
+          switch (error) {
 #ifdef EACCES
           case EACCES:
             fprintf(stderr,"You don't have permission to create %s.\n",
diff --git a/tests/libtest/lib518.c b/tests/libtest/lib518.c
index 368b902ae..413168c60 100644
--- a/tests/libtest/lib518.c
+++ b/tests/libtest/lib518.c
@@ -46,20 +46,6 @@ static int *fd = NULL;
 static struct rlimit num_open;
 static char msgbuff[256];
 
-/*
- * our_errno() returns the NOT *socket-related* errno (or equivalent)
- * on this platform to hide platform specific for the calling function.
- */
-
-static int our_errno(void)
-{
-#ifdef WIN32
-  return (int)GetLastError();
-#else
-  return errno;
-#endif
-}
-
 static void store_errmsg(const char *msg, int err)
 {
   if (!err)
@@ -102,7 +88,7 @@ static int rlimit(int keep_open)
   /* get initial open file limits */
 
   if (getrlimit(RLIMIT_NOFILE, &rl) != 0) {
-    store_errmsg("getrlimit() failed", our_errno());
+    store_errmsg("getrlimit() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     return -1;
   }
@@ -145,7 +131,7 @@ static int rlimit(int keep_open)
     fprintf(stderr, "raising soft limit up to hard limit\n");
     rl.rlim_cur = rl.rlim_max;
     if (setrlimit(RLIMIT_NOFILE, &rl) != 0) {
-      store_errmsg("setrlimit() failed", our_errno());
+      store_errmsg("setrlimit() failed", ERRNO);
       fprintf(stderr, "%s\n", msgbuff);
       return -2;
     }
@@ -153,7 +139,7 @@ static int rlimit(int keep_open)
     /* get current open file limits */
 
     if (getrlimit(RLIMIT_NOFILE, &rl) != 0) {
-      store_errmsg("getrlimit() failed", our_errno());
+      store_errmsg("getrlimit() failed", ERRNO);
       fprintf(stderr, "%s\n", msgbuff);
       return -3;
     }
@@ -233,7 +219,7 @@ static int rlimit(int keep_open)
     }
   } while (nitems && !memchunk);
   if (!memchunk) {
-    store_errmsg("memchunk, malloc() failed", our_errno());
+    store_errmsg("memchunk, malloc() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     return -5;
   }
@@ -268,7 +254,7 @@ static int rlimit(int keep_open)
 
   fd = malloc(sizeof(*fd) * (size_t)(num_open.rlim_max));
   if (!fd) {
-    store_errmsg("fd, malloc() failed", our_errno());
+    store_errmsg("fd, malloc() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     free(memchunk);
     return -7;
@@ -291,7 +277,7 @@ static int rlimit(int keep_open)
   fd[0] = open(DEV_NULL, O_RDONLY);
   if (fd[0] < 0) {
     sprintf(strbuff, "opening of %s failed", DEV_NULL);
-    store_errmsg(strbuff, our_errno());
+    store_errmsg(strbuff, ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     free(fd);
     fd = NULL;
diff --git a/tests/libtest/lib537.c b/tests/libtest/lib537.c
index fb2482083..85635043b 100644
--- a/tests/libtest/lib537.c
+++ b/tests/libtest/lib537.c
@@ -48,20 +48,6 @@ static int *fd = NULL;
 static struct rlimit num_open;
 static char msgbuff[256];
 
-/*
- * our_errno() returns the NOT *socket-related* errno (or equivalent)
- * on this platform to hide platform specific for the calling function.
- */
-
-static int our_errno(void)
-{
-#ifdef WIN32
-  return (int)GetLastError();
-#else
-  return errno;
-#endif
-}
-
 static void store_errmsg(const char *msg, int err)
 {
   if (!err)
@@ -104,7 +90,7 @@ static int rlimit(int keep_open)
   /* get initial open file limits */
 
   if (getrlimit(RLIMIT_NOFILE, &rl) != 0) {
-    store_errmsg("getrlimit() failed", our_errno());
+    store_errmsg("getrlimit() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     return -1;
   }
@@ -141,7 +127,7 @@ static int rlimit(int keep_open)
     fprintf(stderr, "raising soft limit up to hard limit\n");
     rl.rlim_cur = rl.rlim_max;
     if (setrlimit(RLIMIT_NOFILE, &rl) != 0) {
-      store_errmsg("setrlimit() failed", our_errno());
+      store_errmsg("setrlimit() failed", ERRNO);
       fprintf(stderr, "%s\n", msgbuff);
       return -2;
     }
@@ -149,7 +135,7 @@ static int rlimit(int keep_open)
     /* get current open file limits */
 
     if (getrlimit(RLIMIT_NOFILE, &rl) != 0) {
-      store_errmsg("getrlimit() failed", our_errno());
+      store_errmsg("getrlimit() failed", ERRNO);
       fprintf(stderr, "%s\n", msgbuff);
       return -3;
     }
@@ -208,7 +194,7 @@ static int rlimit(int keep_open)
     }
   } while (nitems && !memchunk);
   if (!memchunk) {
-    store_errmsg("memchunk, malloc() failed", our_errno());
+    store_errmsg("memchunk, malloc() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     return -4;
   }
@@ -263,7 +249,7 @@ static int rlimit(int keep_open)
     }
   } while (num_open.rlim_max && !fd);
   if (!fd) {
-    store_errmsg("fd, malloc() failed", our_errno());
+    store_errmsg("fd, malloc() failed", ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     free(memchunk);
     return -6;
@@ -286,7 +272,7 @@ static int rlimit(int keep_open)
   fd[0] = open(DEV_NULL, O_RDONLY);
   if (fd[0] < 0) {
     sprintf(strbuff, "opening of %s failed", DEV_NULL);
-    store_errmsg(strbuff, our_errno());
+    store_errmsg(strbuff, ERRNO);
     fprintf(stderr, "%s\n", msgbuff);
     free(fd);
     fd = NULL;
diff --git a/tests/libtest/test.h b/tests/libtest/test.h
index fa32d6d88..5e298abbd 100644
--- a/tests/libtest/test.h
+++ b/tests/libtest/test.h
@@ -8,18 +8,17 @@
  * $Id$
  */
 
-#ifdef HAVE_CONFIG_H
 /* Now include the setup.h file from libcurl's private libdir (the source
    version, but that might include "config.h" from the build dir so we need
    both of them in the include path), so that we get good in-depth knowledge
    about the system we're building this on */
 #include "setup.h"
-#endif
 
 #include <curl.h>
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
diff --git a/tests/server/sockfilt.c b/tests/server/sockfilt.c
index ea3b43940..7ea0270d3 100644
--- a/tests/server/sockfilt.c
+++ b/tests/server/sockfilt.c
@@ -238,7 +238,7 @@ static int juggle(curl_socket_t *sockfdp,
 
   do {
     rc = select(maxfd + 1, &fds_read, &fds_write, &fds_err, &timeout);
-  } while((rc == -1) && (our_sockerrno() == EINTR));
+  } while((rc == -1) && (SOCKERRNO == EINTR));
 
   switch(rc) {
   case -1:
@@ -447,7 +447,7 @@ static curl_socket_t sockdaemon(curl_socket_t sock,
   /* start accepting connections */
   rc = listen(sock, 4);
   if(0 != rc) {
-    logmsg("listen() failed with error: %d", errno);
+    logmsg("listen() failed with error: %d", SOCKERRNO);
     sclose(sock);
     return CURL_SOCKET_BAD;
   }
@@ -570,7 +570,7 @@ int main(int argc, char *argv[])
 
   sock = mksock(use_ipv6);
   if (CURL_SOCKET_BAD == sock) {
-    logmsg("Error opening socket: %d", errno);
+    logmsg("Error opening socket: %d", SOCKERRNO);
     return 1;
   }
 
diff --git a/tests/server/sws.c b/tests/server/sws.c
index 57c4b5eb5..88f72218f 100644
--- a/tests/server/sws.c
+++ b/tests/server/sws.c
@@ -466,7 +466,7 @@ void storerequest(char *reqbuf)
 
   do {
     dump = fopen(REQUEST_DUMP, "ab");
-  } while ((dump == NULL) && ((error = errno) == EINTR));
+  } while ((dump == NULL) && ((error = ERRNO) == EINTR));
   if (dump == NULL) {
     logmsg("Error opening file %s error: %d", REQUEST_DUMP, error);
     logmsg("Failed to write request input to " REQUEST_DUMP);
@@ -479,7 +479,7 @@ void storerequest(char *reqbuf)
                               1, (size_t)writeleft, dump);
     if (written > 0)
       writeleft -= written;
-  } while ((writeleft > 0) && ((error = errno) == EINTR));
+  } while ((writeleft > 0) && ((error = ERRNO) == EINTR));
 
   fclose(dump);  /* close it ASAP */
 
@@ -515,7 +515,7 @@ static int get_request(curl_socket_t sock, struct httprequest *req)
     ssize_t got = sread(sock, reqbuf + req->offset, REQBUFSIZ - req->offset);
     if (got <= 0) {
       if (got < 0) {
-        logmsg("recv() returned error: %d", errno);
+        logmsg("recv() returned error: %d", SOCKERRNO);
         return DOCNUMBER_INTERNAL;
       }
       logmsg("Connection closed by client");
@@ -830,14 +830,14 @@ int main(int argc, char *argv[])
 #endif
 
   if (CURL_SOCKET_BAD == sock) {
-    logmsg("Error opening socket: %d", errno);
+    logmsg("Error opening socket: %d", SOCKERRNO);
     return 1;
   }
 
   flag = 1;
   if (0 != setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
             (void *) &flag, sizeof(flag))) {
-    logmsg("setsockopt(SO_REUSEADDR) failed: %d", errno);
+    logmsg("setsockopt(SO_REUSEADDR) failed: %d", SOCKERRNO);
     sclose(sock);
     return 1;
   }
@@ -861,7 +861,7 @@ int main(int argc, char *argv[])
   }
 #endif /* ENABLE_IPV6 */
   if(0 != rc) {
-    logmsg("Error binding socket: %d", errno);
+    logmsg("Error binding socket: %d", SOCKERRNO);
     sclose(sock);
     return 1;
   }
@@ -888,7 +888,7 @@ int main(int argc, char *argv[])
   /* start accepting connections */
   rc = listen(sock, 5);
   if(0 != rc) {
-    logmsg("listen() failed with error: %d", errno);
+    logmsg("listen() failed with error: %d", SOCKERRNO);
     sclose(sock);
     return 1;
   }
@@ -897,7 +897,7 @@ int main(int argc, char *argv[])
     msgsock = accept(sock, NULL, NULL);
 
     if (CURL_SOCKET_BAD == msgsock) {
-      printf("MAJOR ERROR: accept() failed with error: %d\n", errno);
+      printf("MAJOR ERROR: accept() failed with error: %d\n", SOCKERRNO);
       break;
     }
 
diff --git a/tests/server/tftpd.c b/tests/server/tftpd.c
index 561f2f044..a97325b7a 100644
--- a/tests/server/tftpd.c
+++ b/tests/server/tftpd.c
@@ -749,7 +749,7 @@ static void sendtftp(struct testcase *test, struct formats *pf)
   do {
     size = readit(test, &dp, pf->f_convert);
     if (size < 0) {
-      nak(errno + 100);
+      nak(ERRNO + 100);
       return;
     }
     dp->th_opcode = htons((u_short)DATA);
@@ -864,7 +864,7 @@ send_ack:
     size = writeit(test, &dp, (int)(n - 4), pf->f_convert);
     if (size != (n-4)) {                 /* ahem */
       if (size < 0)
-        nak(errno + 100);
+        nak(ERRNO + 100);
       else
         nak(ENOSPACE);
       goto abort;
diff --git a/tests/server/util.c b/tests/server/util.c
index ddc4bc949..5dbf6e658 100644
--- a/tests/server/util.c
+++ b/tests/server/util.c
@@ -59,19 +59,6 @@
 const struct in6_addr in6addr_any = {{ IN6ADDR_ANY_INIT }};
 #endif
 
-/*
- * our_sockerrno() returns the *socket-related* errno (or equivalent) on this
- * platform to hide platform specific for the function that calls this.
- */
-int our_sockerrno(void)
-{
-#ifdef USE_WINSOCK
-  return (int)WSAGetLastError();
-#else
-  return errno;
-#endif
-}
-
 /* someone else must set this properly */
 extern const char *serverlogfile;
 
diff --git a/tests/server/util.h b/tests/server/util.h
index fa225c036..b0b4ae4c9 100644
--- a/tests/server/util.h
+++ b/tests/server/util.h
@@ -23,7 +23,6 @@
  * $Id$
  ***************************************************************************/
 
-int our_sockerrno(void);
 void logmsg(const char *msg, ...);
 
 #ifndef FALSE