diff --git a/nsprpub/TAG-INFO b/nsprpub/TAG-INFO
index e2d82db2e440..636d97051dda 100644
--- a/nsprpub/TAG-INFO
+++ b/nsprpub/TAG-INFO
@@ -1 +1 @@
-NSPR_4_24_RTM
\ No newline at end of file
+NSPR_4_25_BETA1
\ No newline at end of file
diff --git a/nsprpub/config/prdepend.h b/nsprpub/config/prdepend.h
index 6c66b37ca0fc..e49e92677e3e 100644
--- a/nsprpub/config/prdepend.h
+++ b/nsprpub/config/prdepend.h
@@ -10,4 +10,3 @@
  */
 
 #error "Do not include this header file."
-
diff --git a/nsprpub/configure b/nsprpub/configure
index 68dfd5f62bf4..2fe15c7c64c8 100755
--- a/nsprpub/configure
+++ b/nsprpub/configure
@@ -2486,7 +2486,7 @@ test -n "$target_alias" &&
   program_prefix=${target_alias}-
 
 MOD_MAJOR_VERSION=4
-MOD_MINOR_VERSION=24
+MOD_MINOR_VERSION=25
 MOD_PATCH_VERSION=0
 NSPR_MODNAME=nspr20
 _HAVE_PTHREADS=
diff --git a/nsprpub/configure.in b/nsprpub/configure.in
index 8d8da1ec2628..1c23fefa46e6 100644
--- a/nsprpub/configure.in
+++ b/nsprpub/configure.in
@@ -15,7 +15,7 @@ dnl ========================================================
 dnl = Defaults
 dnl ========================================================
 MOD_MAJOR_VERSION=4
-MOD_MINOR_VERSION=24
+MOD_MINOR_VERSION=25
 MOD_PATCH_VERSION=0
 NSPR_MODNAME=nspr20
 _HAVE_PTHREADS=
diff --git a/nsprpub/pr/include/prinit.h b/nsprpub/pr/include/prinit.h
index eb3cfa059a88..5ddc9aa9537f 100644
--- a/nsprpub/pr/include/prinit.h
+++ b/nsprpub/pr/include/prinit.h
@@ -31,11 +31,11 @@ PR_BEGIN_EXTERN_C
 ** The format of the version string is
 **     "<major version>.<minor version>[.<patch level>] [<Beta>]"
 */
-#define PR_VERSION  "4.24"
+#define PR_VERSION  "4.25 Beta"
 #define PR_VMAJOR   4
-#define PR_VMINOR   24
+#define PR_VMINOR   25
 #define PR_VPATCH   0
-#define PR_BETA     PR_FALSE
+#define PR_BETA     PR_TRUE
 
 /*
 ** PRVersionCheck
diff --git a/nsprpub/pr/src/md/windows/ntio.c b/nsprpub/pr/src/md/windows/ntio.c
index 040bbd31069a..40f52007892f 100644
--- a/nsprpub/pr/src/md/windows/ntio.c
+++ b/nsprpub/pr/src/md/windows/ntio.c
@@ -2252,6 +2252,7 @@ _PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len)
     int rv, err;
     LONG hiOffset = 0;
     LONG loOffset;
+    LARGE_INTEGER offset; /* use for a normalized add of len to offset */
 
     if (!fd->secret->md.sync_file_io) {
         PRThread *me = _PR_MD_CURRENT_THREAD();
@@ -2368,7 +2369,14 @@ _PR_MD_READ(PRFileDesc *fd, void *buf, PRInt32 len)
                 return -1;
             }
 
-            SetFilePointer((HANDLE)f, me->md.blocked_io_bytes, 0, FILE_CURRENT);
+            /* Apply the workaround from bug 70765 (see _PR_MD_WRITE)
+             * to the reading code, too. */
+
+            offset.LowPart = me->md.overlapped.overlapped.Offset;
+            offset.HighPart = me->md.overlapped.overlapped.OffsetHigh;
+            offset.QuadPart += me->md.blocked_io_bytes;
+
+            SetFilePointer((HANDLE)f, offset.LowPart, &offset.HighPart, FILE_BEGIN);
 
             PR_ASSERT(me->io_pending == PR_FALSE);
 
diff --git a/nsprpub/pr/tests/Makefile.in b/nsprpub/pr/tests/Makefile.in
index 8a87ad094909..876a0954b977 100644
--- a/nsprpub/pr/tests/Makefile.in
+++ b/nsprpub/pr/tests/Makefile.in
@@ -442,17 +442,4 @@ endif
 ALWAYS:
 
 runtests:: $(PROGS) ALWAYS
-	@$(ECHO) "\nNSPR Test Results - $(OBJDIR)\n"
-	@$(ECHO) "BEGIN\t\t\t`date`"
-	@$(ECHO) "NSPR_TEST_LOGFILE\t$(LOGFILE)\n"
-	@$(ECHO) "Test\t\t\tResult\n"
-	@cd $(OBJDIR); for i in $(PROGRAMS); do					\
-	$(ECHO) "$$i\c";										\
-	./$$i >> $(LOGFILE) 2>&1 ;								\
-	if  [ 0 = $$? ] ; then									\
-		$(ECHO) "\t\t\tPassed";								\
-	else													\
-		$(ECHO) "\t\t\tFAILED";								\
-	fi;														\
-	done
-	@$(ECHO) "\nEND\t\t`date`\n"
+	$(topsrcdir)/pr/tests/runtests.sh $(DIST)
diff --git a/nsprpub/pr/tests/acceptread.c b/nsprpub/pr/tests/acceptread.c
index d7fe079c4f8c..090b08455558 100644
--- a/nsprpub/pr/tests/acceptread.c
+++ b/nsprpub/pr/tests/acceptread.c
@@ -14,7 +14,18 @@
 
 #include <stdlib.h>
 
-#define DEFAULT_PORT 12273
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define DEFAULT_PORT 12273 PORT_INC_DO PORT_INC_3264
 #define GET "GET / HTTP/1.0\n\n"
 static PRFileDesc *std_out, *err_out;
 static PRIntervalTime write_dally, accept_timeout;
diff --git a/nsprpub/pr/tests/acceptreademu.c b/nsprpub/pr/tests/acceptreademu.c
index 75140c02f6d7..485b9d502596 100644
--- a/nsprpub/pr/tests/acceptreademu.c
+++ b/nsprpub/pr/tests/acceptreademu.c
@@ -20,7 +20,18 @@
 
 #include <stdlib.h>
 
-#define DEFAULT_PORT 12273
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define DEFAULT_PORT 12273 PORT_INC_DO PORT_INC_3264
 #define GET "GET / HTTP/1.0\n\n"
 static PRFileDesc *std_out, *err_out;
 static PRIntervalTime write_dally, accept_timeout;
diff --git a/nsprpub/pr/tests/append.c b/nsprpub/pr/tests/append.c
index 9d688a4f8401..64fe3ff2c13e 100644
--- a/nsprpub/pr/tests/append.c
+++ b/nsprpub/pr/tests/append.c
@@ -62,7 +62,7 @@ int main(int argc, char **argv)
         PL_DestroyOptState(opt);
     } /* end block "Get command line options" */
     /* ---------------------------------------------------------------------- */
-    fd = PR_Open( "/tmp/nsprAppend", (PR_APPEND | PR_CREATE_FILE | PR_TRUNCATE | PR_WRONLY), 0666 );
+    fd = PR_Open( "./tmp-nsprAppend", (PR_APPEND | PR_CREATE_FILE | PR_TRUNCATE | PR_WRONLY), 0666 );
     if ( NULL == fd )  {
         if (debug) {
             printf("PR_Open() failed for writing: %d\n", PR_GetError());
@@ -98,7 +98,7 @@ int main(int argc, char **argv)
         goto Finished;
     }
     /* ---------------------------------------------------------------------- */
-    fd = PR_Open( "/tmp/nsprAppend", PR_RDONLY, 0 );
+    fd = PR_Open( "./tmp-nsprAppend", PR_RDONLY, 0 );
     if ( NULL == fd )  {
         if (debug) {
             printf("PR_Open() failed for reading: %d\n", PR_GetError());
diff --git a/nsprpub/pr/tests/cltsrv.c b/nsprpub/pr/tests/cltsrv.c
index caf1ad4d6693..2dbe4c7ae941 100644
--- a/nsprpub/pr/tests/cltsrv.c
+++ b/nsprpub/pr/tests/cltsrv.c
@@ -64,7 +64,20 @@
 #define DEFAULT_HIGH 0
 #define BUFFER_SIZE 1024
 #define DEFAULT_BACKLOG 5
-#define DEFAULT_PORT 12849
+
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define DEFAULT_PORT 12849 PORT_INC_DO PORT_INC_3264
+
 #define DEFAULT_CLIENTS 1
 #define ALLOWED_IN_ACCEPT 1
 #define DEFAULT_CLIPPING 1000
@@ -792,11 +805,16 @@ static void PR_CALLBACK Server(void *arg)
 
     memset(&serverAddress, 0, sizeof(serverAddress));
     if (PR_AF_INET6 != domain) {
+        TEST_LOG(cltsrv_log_file, TEST_LOG_ALWAYS,
+                 ("server binding to ip port %s\n", DEFAULT_PORT));
         rv = PR_InitializeNetAddr(PR_IpAddrAny, DEFAULT_PORT, &serverAddress);
     }
-    else
+    else {
+        TEST_LOG(cltsrv_log_file, TEST_LOG_ALWAYS,
+                 ("server binding to ipv6 port %s\n", DEFAULT_PORT));
         rv = PR_SetNetAddr(PR_IpAddrAny, PR_AF_INET6, DEFAULT_PORT,
                            &serverAddress);
+    }
     rv = PR_Bind(server->listener, &serverAddress);
     TEST_ASSERT(PR_SUCCESS == rv);
 
@@ -1131,16 +1149,24 @@ int main(int argc, char** argv)
             client[index].ml = PR_NewLock();
             if (serverIsLocal)
             {
-                if (PR_AF_INET6 != domain)
+                if (PR_AF_INET6 != domain) {
+                    TEST_LOG(cltsrv_log_file, TEST_LOG_ALWAYS,
+                             ("loopback client ip port %s\n", DEFAULT_PORT));
                     (void)PR_InitializeNetAddr(
                         PR_IpAddrLoopback, DEFAULT_PORT,
                         &client[index].serverAddress);
-                else
+                }
+                else {
+                    TEST_LOG(cltsrv_log_file, TEST_LOG_ALWAYS,
+                             ("loopback client ipv6 port %s\n", DEFAULT_PORT));
                     rv = PR_SetNetAddr(PR_IpAddrLoopback, PR_AF_INET6,
                                        DEFAULT_PORT, &client[index].serverAddress);
+                }
             }
             else
             {
+                TEST_LOG(cltsrv_log_file, TEST_LOG_ALWAYS,
+                         ("client enumerate port %s\n", DEFAULT_PORT));
                 (void)PR_EnumerateHostEnt(
                     0, &host, DEFAULT_PORT, &client[index].serverAddress);
             }
diff --git a/nsprpub/pr/tests/fdcach.c b/nsprpub/pr/tests/fdcach.c
index 2fb2e5b8107f..5fa51b706a8a 100644
--- a/nsprpub/pr/tests/fdcach.c
+++ b/nsprpub/pr/tests/fdcach.c
@@ -6,7 +6,7 @@
 /*
  * File: fdcach.c
  * Description:
- *   This test verifies that the fd cache and stack are working
+ *   This test verifies that the fd cache is working
  *   correctly.
  */
 
@@ -18,7 +18,7 @@
 /*
  * Define ORDER_PRESERVED if the implementation of PR_SetFDCacheSize
  * preserves the ordering of the fd's when moving them between the
- * cache and the stack.
+ * cache.
  */
 #define ORDER_PRESERVED 1
 
@@ -35,12 +35,6 @@ int main(int argc, char **argv)
     PRFileDesc *savefds[NUM_FDS];
     int numfds = sizeof(fds)/sizeof(fds[0]);
 
-    /*
-     * Switch between cache and stack when they are empty.
-     * Then start with the fd cache.
-     */
-    PR_SetFDCacheSize(0, FD_CACHE_SIZE);
-    PR_SetFDCacheSize(0, 0);
     PR_SetFDCacheSize(0, FD_CACHE_SIZE);
 
     /* Add some fd's to the fd cache. */
@@ -82,59 +76,6 @@ int main(int argc, char **argv)
         }
     }
 
-    /* Switch to the fd stack. */
-    PR_SetFDCacheSize(0, 0);
-
-    /*
-     * Create some fd's.  These fd's should come from
-     * the fd stack.
-     */
-    for (i = 0; i < numfds; i++) {
-        fds[i] = PR_NewTCPSocket();
-        if (NULL == fds[i]) {
-            fprintf(stderr, "PR_NewTCPSocket failed\n");
-            exit(1);
-        }
-#ifdef ORDER_PRESERVED
-        if (fds[i] != savefds[numfds-1-i]) {
-            fprintf(stderr, "fd stack malfunctioned\n");
-            exit(1);
-        }
-#else
-        savefds[numfds-1-i] = fds[i];
-#endif
-    }
-    /* Put the fd's back to the fd stack. */
-    for (i = 0; i < numfds; i++) {
-        if (PR_Close(savefds[i]) == PR_FAILURE) {
-            fprintf(stderr, "PR_Close failed\n");
-            exit(1);
-        }
-    }
-
-    /*
-     * Now create some fd's and verify the LIFO ordering of
-     * the fd stack.
-     */
-    for (i = 0; i < numfds; i++) {
-        fds[i] = PR_NewTCPSocket();
-        if (NULL == fds[i]) {
-            fprintf(stderr, "PR_NewTCPSocket failed\n");
-            exit(1);
-        }
-        if (fds[i] != savefds[numfds-1-i]) {
-            fprintf(stderr, "fd stack malfunctioned\n");
-            exit(1);
-        }
-    }
-    /* Put the fd's back to the fd stack. */
-    for (i = 0; i < numfds; i++) {
-        if (PR_Close(savefds[i]) == PR_FAILURE) {
-            fprintf(stderr, "PR_Close failed\n");
-            exit(1);
-        }
-    }
-
     /* Switch to the fd cache. */
     PR_SetFDCacheSize(0, FD_CACHE_SIZE);
 
@@ -178,49 +119,6 @@ int main(int argc, char **argv)
         }
     }
 
-    /* Switch to the fd stack. */
-    PR_SetFDCacheSize(0, 0);
-
-    for (i = 0; i < numfds; i++) {
-        fds[i] = PR_NewTCPSocket();
-        if (NULL == fds[i]) {
-            fprintf(stderr, "PR_NewTCPSocket failed\n");
-            exit(1);
-        }
-#ifdef ORDER_PRESERVED
-        if (fds[i] != savefds[numfds-1-i]) {
-            fprintf(stderr, "fd stack malfunctioned\n");
-            exit(1);
-        }
-#else
-        savefds[numfds-1-i];
-#endif
-    }
-    for (i = 0; i < numfds; i++) {
-        if (PR_Close(savefds[i]) == PR_FAILURE) {
-            fprintf(stderr, "PR_Close failed\n");
-            exit(1);
-        }
-    }
-
-    for (i = 0; i < numfds; i++) {
-        fds[i] = PR_NewTCPSocket();
-        if (NULL == fds[i]) {
-            fprintf(stderr, "PR_NewTCPSocket failed\n");
-            exit(1);
-        }
-        if (fds[i] != savefds[numfds-1-i]) {
-            fprintf(stderr, "fd stack malfunctioned\n");
-            exit(1);
-        }
-    }
-    for (i = 0; i < numfds; i++) {
-        if (PR_Close(savefds[i]) == PR_FAILURE) {
-            fprintf(stderr, "PR_Close failed\n");
-            exit(1);
-        }
-    }
-
     PR_Cleanup();
     printf("PASS\n");
     return 0;
diff --git a/nsprpub/pr/tests/foreign.c b/nsprpub/pr/tests/foreign.c
index a711b7580b3b..a1f5b5cbccc8 100644
--- a/nsprpub/pr/tests/foreign.c
+++ b/nsprpub/pr/tests/foreign.c
@@ -223,7 +223,8 @@ static void OneShot(void *arg)
                 break;
 
             case 6:
-#define TEMP_DIR "/tmp/"
+#define TEMP_DIR "./tmp"
+                PR_MkDir(TEMP_DIR, 0700);
                 dir = PR_OpenDir(TEMP_DIR);
                 DPRINTF((output,"Thread[0x%x] called PR_OpenDir\n",
                          PR_GetCurrentThread()));
diff --git a/nsprpub/pr/tests/fsync.c b/nsprpub/pr/tests/fsync.c
index ee2eeff7d999..3e0fb175c19e 100644
--- a/nsprpub/pr/tests/fsync.c
+++ b/nsprpub/pr/tests/fsync.c
@@ -19,7 +19,7 @@ static void Help(void)
     PR_fprintf(err, "\t-c   Nuber of iterations     (default: 10)\n");
     PR_fprintf(err, "\t-S   Sync the file           (default: FALSE)\n");
     PR_fprintf(err, "\t-K   Size of file (K bytes)  (default: 10)\n");
-    PR_fprintf(err, "\t     Name of file to write   (default: /usr/tmp/sync.dat)\n");
+    PR_fprintf(err, "\t     Name of file to write   (default: ./tmp-sync.dat)\n");
     PR_fprintf(err, "\t-h   This message and nothing else\n");
 }  /* Help */
 
diff --git a/nsprpub/pr/tests/gethost.c b/nsprpub/pr/tests/gethost.c
index 8a15cb61c2fe..71704a8454fd 100644
--- a/nsprpub/pr/tests/gethost.c
+++ b/nsprpub/pr/tests/gethost.c
@@ -18,7 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-#define DEFAULT_HOST_NAME "mcom.com"
+#define DEFAULT_HOST_NAME "mozilla.org"
 
 static void Help(void)
 {
diff --git a/nsprpub/pr/tests/layer.c b/nsprpub/pr/tests/layer.c
index 8579394dc317..8ad32eeaa874 100644
--- a/nsprpub/pr/tests/layer.c
+++ b/nsprpub/pr/tests/layer.c
@@ -40,7 +40,19 @@ typedef enum Verbosity {silent, quiet, chatty, noisy} Verbosity;
 static PRIntn minor_iterations = 5;
 static PRIntn major_iterations = 1;
 static Verbosity verbosity = quiet;
-static PRUint16 default_port = 12273;
+
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+static PRUint16 default_port = 12273 PORT_INC_DO PORT_INC_3264;
 
 static PRFileDesc *PushLayer(PRFileDesc *stack)
 {
diff --git a/nsprpub/pr/tests/lazyinit.c b/nsprpub/pr/tests/lazyinit.c
index 5ec1c9578e4b..2a910f2051cf 100644
--- a/nsprpub/pr/tests/lazyinit.c
+++ b/nsprpub/pr/tests/lazyinit.c
@@ -70,7 +70,7 @@ int main(int argc, char **argv)
                                  PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
             break;
 
-        case 3: file = PR_Open("/usr/tmp/", PR_RDONLY, 0);
+        case 3: file = PR_Open("./tmp-", PR_RDONLY, 0);
             break;
 
         case 4: udp = PR_NewUDPSocket();
@@ -79,7 +79,7 @@ int main(int argc, char **argv)
         case 5: tcp = PR_NewTCPSocket();
             break;
 
-        case 6: dir = PR_OpenDir("/usr/tmp/");
+        case 6: dir = PR_OpenDir("./tmp-");
             break;
 
         case 7: (void)PR_NewThreadPrivateIndex(&pdkey, NULL);
diff --git a/nsprpub/pr/tests/multiwait.c b/nsprpub/pr/tests/multiwait.c
index 243b315e89a9..62a07f042841 100644
--- a/nsprpub/pr/tests/multiwait.c
+++ b/nsprpub/pr/tests/multiwait.c
@@ -32,9 +32,20 @@ typedef struct Shared
 
 typedef enum Verbosity {silent, quiet, chatty, noisy} Verbosity;
 
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
 static PRFileDesc *debug = NULL;
 static PRInt32 desc_allocated = 0;
-static PRUint16 default_port = 12273;
+static PRUint16 default_port = 12273 PORT_INC_DO PORT_INC_3264;
 static enum Verbosity verbosity = quiet;
 static PRInt32 ops_required = 1000, ops_done = 0;
 static PRThreadScope thread_scope = PR_LOCAL_THREAD;
diff --git a/nsprpub/pr/tests/nameshm1.c b/nsprpub/pr/tests/nameshm1.c
index 3f7137e23e17..ca24b4e813f4 100644
--- a/nsprpub/pr/tests/nameshm1.c
+++ b/nsprpub/pr/tests/nameshm1.c
@@ -72,9 +72,20 @@
 #include <string.h>
 #include <private/primpl.h>
 
-#define SEM_NAME1 "/tmp/nameshmSEM1"
-#define SEM_NAME2 "/tmp/nameshmSEM2"
-#define OPT_NAME "/tmp/xxxNSPRshm"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define SEM_NAME1 "/tmp/nameshmSEM1" SEM_D SEM_64
+#define SEM_NAME2 "/tmp/nameshmSEM2" SEM_D SEM_64
+#define OPT_NAME "/tmp/xxxNSPRshm" SEM_D SEM_64
 #define EXE_NAME "nameshm1"
 #define SEM_MODE  0666
 #define SHM_MODE  0666
diff --git a/nsprpub/pr/tests/nblayer.c b/nsprpub/pr/tests/nblayer.c
index c9e6bf245a93..9459866972d1 100644
--- a/nsprpub/pr/tests/nblayer.c
+++ b/nsprpub/pr/tests/nblayer.c
@@ -53,7 +53,19 @@ typedef enum Verbosity {silent, quiet, chatty, noisy} Verbosity;
 static PRIntn minor_iterations = 5;
 static PRIntn major_iterations = 1;
 static Verbosity verbosity = quiet;
-static PRUint16 default_port = 12273;
+
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+static PRUint16 default_port = 12273 PORT_INC_DO PORT_INC_3264;
 
 static PRFileDesc *PushLayer(PRFileDesc *stack)
 {
diff --git a/nsprpub/pr/tests/ntioto.c b/nsprpub/pr/tests/ntioto.c
index 5fb01e7605ea..809e0ae5c698 100644
--- a/nsprpub/pr/tests/ntioto.c
+++ b/nsprpub/pr/tests/ntioto.c
@@ -57,7 +57,19 @@ PRUint32  failed_already = 0;
 
 /* JITTER_DEFAULT: the number of times AcceptThread() and JitterThread() ping-pong */
 #define JITTER_DEFAULT  100000
-#define BASE_PORT 9867
+
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define BASE_PORT 9867 PORT_INC_DO PORT_INC_3264
 
 PRIntervalTime timeout;
 PRNetAddr   listenAddr;
diff --git a/nsprpub/pr/tests/op_filnf.c b/nsprpub/pr/tests/op_filnf.c
index 1f1e8eed8782..b4ab2fb15696 100644
--- a/nsprpub/pr/tests/op_filnf.c
+++ b/nsprpub/pr/tests/op_filnf.c
@@ -31,7 +31,7 @@ PRIntn error_code;
 int main(int argc, char **argv)
 {
     PR_STDIO_INIT();
-    t1 = PR_Open("/usr/tmp/ttools/err03.tmp", PR_TRUNCATE | PR_RDWR, 0666);
+    t1 = PR_Open("./tmp-ttools/err03.tmp", PR_TRUNCATE | PR_RDWR, 0666);
     if (t1 == NULL) {
         if (PR_GetError() == PR_FILE_NOT_FOUND_ERROR) {
             printf ("error code is %d \n", PR_GetError());
diff --git a/nsprpub/pr/tests/provider.c b/nsprpub/pr/tests/provider.c
index 1bd15fb6fc0f..3450b20aea82 100644
--- a/nsprpub/pr/tests/provider.c
+++ b/nsprpub/pr/tests/provider.c
@@ -58,11 +58,22 @@
 ** This is the beginning of the test
 */
 
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
 #define RECV_FLAGS 0
 #define SEND_FLAGS 0
 #define BUFFER_SIZE 1024
 #define DEFAULT_BACKLOG 5
-#define DEFAULT_PORT 13000
+#define DEFAULT_PORT 13000 PORT_INC_DO PORT_INC_3264
 #define DEFAULT_CLIENTS 1
 #define ALLOWED_IN_ACCEPT 1
 #define DEFAULT_CLIPPING 1000
diff --git a/nsprpub/pr/tests/runtests.pl b/nsprpub/pr/tests/runtests.pl
index f1ab7647e4e8..326c08f8626d 100755
--- a/nsprpub/pr/tests/runtests.pl
+++ b/nsprpub/pr/tests/runtests.pl
@@ -289,7 +289,6 @@ $prog = shift;  # Program to test
 "logfile",
 "logger",
 "many_cv",
-"multiwait",
 "nameshm1",
 "nblayer",
 "nonblock",
diff --git a/nsprpub/pr/tests/runtests.sh b/nsprpub/pr/tests/runtests.sh
index c570bf86743c..8d3144019d5a 100755
--- a/nsprpub/pr/tests/runtests.sh
+++ b/nsprpub/pr/tests/runtests.sh
@@ -4,6 +4,20 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
+if test -z $1
+then
+  echo "usage: $0 <path-to-dist>"
+  exit 1
+fi
+
+cd $1/lib
+ABS_LIB=$PWD
+cd -
+
+export DYLD_LIBRARY_PATH=${ABS_LIB}:${DYLD_LIBRARY_PATH}
+export LD_LIBRARY_PATH=${ABS_LIB}:${LD_LIBRARY_PATH}
+export PATH=${ABS_LIB}:${PATH}
+
 #
 # runtests.sh
 #	Bourne shell script for nspr tests
@@ -57,12 +71,35 @@ fi
 #
 
 #forktest (failed on IRIX)
+#multiwait - fails on Linux 64bit since NSPR v 4.4 from 2004.
 #nbconn - fails on some platforms 
 #poll_er - fails on some platforms? limited use?
 #prpoll -  the bad-FD test needs to be moved to a different test
 #sleep	-  specific to OS/2
+#
+# all of the following were disabled in 2019 when reenabling CI tests,
+# because they failed on at least one of the platforms:
+#
+# cltsrv
+# cvar
+# gethost
+# getproto
+# layer
+# logfile
+# nameshm1
+# nblayer
+# nonblock
+# ntioto
+# op_2long
+# parent
+# provider
+# ranfile
+# socket
+# sockopt
+# vercheck
 
-LOGFILE=${NSPR_TEST_LOGFILE:-$NULL_DEVICE}
+#LOGFILE=${NSPR_TEST_LOGFILE:-$NULL_DEVICE}
+LOGFILE=nspr-test.log
 
 #
 # Tests run on all platforms
@@ -80,9 +117,7 @@ atomic
 attach
 bigfile
 cleanup
-cltsrv
 concur
-cvar
 cvar2
 dlltest
 dtoa
@@ -93,8 +128,6 @@ fileio
 foreign
 formattm
 fsync
-gethost
-getproto
 i2l
 initclk
 inrval
@@ -108,27 +141,18 @@ joinkk
 joinku
 joinuk
 joinuu
-layer
 lazyinit
 libfilename
 lltest
 lock
 lockfile
-logfile
 logger
 many_cv
-multiwait
-nameshm1
-nblayer
-nonblock
-ntioto
 ntoh
-op_2long
 op_excl
 op_filnf
 op_filok
 op_nofil
-parent
 parsetm
 peek
 perf
@@ -141,10 +165,8 @@ pollable
 prftest
 prfz
 primblok
-provider
 prpollml
 pushtop
-ranfile
 randseed
 reinit
 rwlocktest
@@ -164,8 +186,6 @@ servr_ku
 servr_uu
 short_thread
 sigpipe
-socket
-sockopt
 sockping
 sprintf
 stack
@@ -181,7 +201,6 @@ timemac
 timetest
 tpd
 udpsrv
-vercheck
 version
 writev
 xnotify
@@ -211,7 +230,7 @@ printf "Test\t\t\tResult\n\n"
 if [ $OS_PLATFORM = "Windows_95" ] || [ $OS_PLATFORM = "Windows_98" ] || [ $OS_PLATFORM = "Windows_NT" ] || [ $OS_PLATFORM = "OS/2" ] ; then
 	for prog in $TESTS
 	do
-		printf "$prog"
+		printf "$prog (`date +%T`)"
 		printf "\nBEGIN TEST: $prog\n\n" >> ${LOGFILE} 2>&1
 		./$prog >> ${LOGFILE} 2>&1
 		if [ 0 = $? ] ; then
@@ -225,7 +244,7 @@ if [ $OS_PLATFORM = "Windows_95" ] || [ $OS_PLATFORM = "Windows_98" ] || [ $OS_P
 else
 	for prog in $TESTS
 	do
-		printf "$prog"
+		printf "$prog (`date +%T`)"
 		printf "\nBEGIN TEST: $prog\n\n" >> ${LOGFILE} 2>&1
 		export test_rval
 		./$prog >> ${LOGFILE} 2>&1 &
@@ -249,22 +268,10 @@ else
 	done
 fi;
 
+if [ $rval -ne 0 ]; then
+  cat ${LOGFILE}
+fi
+
 printf "END\t\t\t`date`\n"
 exit $rval
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
diff --git a/nsprpub/pr/tests/sel_spd.c b/nsprpub/pr/tests/sel_spd.c
index 6c17042341ca..bb9082448477 100644
--- a/nsprpub/pr/tests/sel_spd.c
+++ b/nsprpub/pr/tests/sel_spd.c
@@ -16,7 +16,18 @@
 #include <errno.h>
 #include <string.h>
 
-#define PORT_BASE 19000
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define PORT_BASE 19000 PORT_INC_DO PORT_INC_3264
 
 typedef struct timer_slot_t {
     unsigned long d_connect;
diff --git a/nsprpub/pr/tests/sema.c b/nsprpub/pr/tests/sema.c
index 76198eb047fe..81ccd01b7a37 100644
--- a/nsprpub/pr/tests/sema.c
+++ b/nsprpub/pr/tests/sema.c
@@ -8,8 +8,19 @@
 
 #include <stdio.h>
 
-#define SEM_NAME1 "/tmp/foo.sem"
-#define SEM_NAME2 "/tmp/bar.sem"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
+#define SEM_NAME2 "/tmp/bar.sem" SEM_D SEM_64
 #define SEM_MODE  0666
 #define ITERATIONS 1000
 
diff --git a/nsprpub/pr/tests/semaerr.c b/nsprpub/pr/tests/semaerr.c
index 4e6a8ff27a2e..f3c253b4f4e9 100644
--- a/nsprpub/pr/tests/semaerr.c
+++ b/nsprpub/pr/tests/semaerr.c
@@ -8,8 +8,19 @@
 
 #include <stdio.h>
 
-#define NO_SUCH_SEM_NAME "/tmp/nosuchsem.sem"
-#define SEM_NAME1 "/tmp/foo.sem"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define NO_SUCH_SEM_NAME "/tmp/nosuchsem.sem" SEM_D SEM_64
+#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
 #define EXE_NAME "semaerr1"
 #define SEM_MODE  0666
 
diff --git a/nsprpub/pr/tests/semaerr1.c b/nsprpub/pr/tests/semaerr1.c
index b2e4987230f2..9271663d69c7 100644
--- a/nsprpub/pr/tests/semaerr1.c
+++ b/nsprpub/pr/tests/semaerr1.c
@@ -8,8 +8,19 @@
 
 #include <stdio.h>
 
-#define SEM_NAME1 "/tmp/foo.sem"
-#define SEM_NAME2 "/tmp/bar.sem"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
+#define SEM_NAME2 "/tmp/bar.sem" SEM_D SEM_64
 #define SEM_MODE  0666
 
 static PRBool debug_mode = PR_FALSE;
diff --git a/nsprpub/pr/tests/semaping.c b/nsprpub/pr/tests/semaping.c
index 2f31bd0bc7a1..3b653d524e0d 100644
--- a/nsprpub/pr/tests/semaping.c
+++ b/nsprpub/pr/tests/semaping.c
@@ -8,9 +8,20 @@
 
 #include <stdio.h>
 
-#define SHM_NAME "/tmp/counter"
-#define SEM_NAME1 "/tmp/foo.sem"
-#define SEM_NAME2 "/tmp/bar.sem"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define SHM_NAME "/tmp/counter" SEM_D SEM_64
+#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
+#define SEM_NAME2 "/tmp/bar.sem" SEM_D SEM_64
 #define EXE_NAME "semapong"
 #define SEM_MODE  0666
 #define SHM_MODE  0666
diff --git a/nsprpub/pr/tests/semapong.c b/nsprpub/pr/tests/semapong.c
index 954f90f1d964..fd24824e31ce 100644
--- a/nsprpub/pr/tests/semapong.c
+++ b/nsprpub/pr/tests/semapong.c
@@ -8,9 +8,20 @@
 
 #include <stdio.h>
 
-#define SHM_NAME "/tmp/counter"
-#define SEM_NAME1 "/tmp/foo.sem"
-#define SEM_NAME2 "/tmp/bar.sem"
+#ifdef DEBUG
+#define SEM_D "D"
+#else
+#define SEM_D
+#endif
+#ifdef IS_64
+#define SEM_64 "64"
+#else
+#define SEM_64
+#endif
+
+#define SHM_NAME "/tmp/counter" SEM_D SEM_64
+#define SEM_NAME1 "/tmp/foo.sem" SEM_D SEM_64
+#define SEM_NAME2 "/tmp/bar.sem" SEM_D SEM_64
 #define ITERATIONS 1000
 
 static PRBool debug_mode = PR_FALSE;
diff --git a/nsprpub/pr/tests/socket.c b/nsprpub/pr/tests/socket.c
index a4925350c4f8..232898f69e7a 100644
--- a/nsprpub/pr/tests/socket.c
+++ b/nsprpub/pr/tests/socket.c
@@ -45,9 +45,9 @@ char *TEST_DIR = "prdir";
 char *SMALL_FILE_NAME = "prsmallf";
 char *LARGE_FILE_NAME = "prlargef";
 #else
-char *TEST_DIR = "/tmp/prsocket_test_dir";
-char *SMALL_FILE_NAME = "/tmp/prsocket_test_dir/small_file";
-char *LARGE_FILE_NAME = "/tmp/prsocket_test_dir/large_file";
+char *TEST_DIR = "./tmp-prsocket_test_dir";
+char *SMALL_FILE_NAME = "./tmp-prsocket_test_dir/small_file";
+char *LARGE_FILE_NAME = "./tmp-prsocket_test_dir/large_file";
 #endif
 #define SMALL_FILE_SIZE             (3 * 1024)        /* 3 KB        */
 #define SMALL_FILE_OFFSET_1         (512)
diff --git a/nsprpub/pr/tests/testfile.c b/nsprpub/pr/tests/testfile.c
index 99cf94ddd50c..88d4afbfdc79 100644
--- a/nsprpub/pr/tests/testfile.c
+++ b/nsprpub/pr/tests/testfile.c
@@ -71,7 +71,7 @@ char *TEST_DIR = "C:\\temp\\prdir";
 char *FILE_NAME = "pr_testfile";
 char *HIDDEN_FILE_NAME = "hidden_pr_testfile";
 #else
-char *TEST_DIR = "/tmp/testfile_dir";
+char *TEST_DIR = "./tmp-testfile_dir";
 char *FILE_NAME = "pr_testfile";
 char *HIDDEN_FILE_NAME = ".hidden_pr_testfile";
 #endif
diff --git a/nsprpub/pr/tests/thruput.c b/nsprpub/pr/tests/thruput.c
index a772deaab1c9..156bbde9a3ed 100644
--- a/nsprpub/pr/tests/thruput.c
+++ b/nsprpub/pr/tests/thruput.c
@@ -27,7 +27,20 @@
 #include "plgetopt.h"
 
 #define ADDR_BUFFER 100
-#define PORT_NUMBER 51877
+
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define PORT_NUMBER 51877 PORT_INC_DO PORT_INC_3264
+
 #define SAMPLING_INTERVAL 10
 #define BUFFER_SIZE (32 * 1024)
 
diff --git a/nsprpub/pr/tests/tmoacc.c b/nsprpub/pr/tests/tmoacc.c
index a4d14daaa8f5..d7e64cbea68d 100644
--- a/nsprpub/pr/tests/tmoacc.c
+++ b/nsprpub/pr/tests/tmoacc.c
@@ -11,7 +11,18 @@
 #include "plerror.h"
 #include "plgetopt.h"
 
-#define BASE_PORT 9867
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define BASE_PORT 9867 PORT_INC_DO PORT_INC_3264
 #define DEFAULT_THREADS 1
 #define DEFAULT_BACKLOG 10
 #define DEFAULT_TIMEOUT 10
diff --git a/nsprpub/pr/tests/tmocon.c b/nsprpub/pr/tests/tmocon.c
index 9d214bc5d270..3d992c344306 100644
--- a/nsprpub/pr/tests/tmocon.c
+++ b/nsprpub/pr/tests/tmocon.c
@@ -50,7 +50,18 @@ char *getcwd(char *buf, size_t size)
 }
 #endif
 
-#define BASE_PORT 9867
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define BASE_PORT 9867 PORT_INC_DO PORT_INC_3264
 
 #define DEFAULT_DALLY 1
 #define DEFAULT_THREADS 1
diff --git a/nsprpub/pr/tests/vercheck.c b/nsprpub/pr/tests/vercheck.c
index 6217e97d2108..2fc0fabeeff3 100644
--- a/nsprpub/pr/tests/vercheck.c
+++ b/nsprpub/pr/tests/vercheck.c
@@ -41,7 +41,7 @@ static char *compatible_version[] = {
     "4.10.5", "4.10.6", "4.10.7", "4.10.8", "4.10.9",
     "4.10.10", "4.11", "4.12", "4.13", "4.14", "4.15",
     "4.16", "4.17", "4.18", "4.19", "4.20", "4.21", "4.22",
-    "4.23",
+    "4.23", "4.24",
     PR_VERSION
 };
 
@@ -57,8 +57,8 @@ static char *incompatible_version[] = {
     "3.0", "3.0.1",
     "3.1", "3.1.1", "3.1.2", "3.1.3",
     "3.5", "3.5.1",
-    "4.24.1",
-    "4.25", "4.25.1",
+    "4.25.1",
+    "4.26", "4.26.1",
     "10.0", "11.1", "12.14.20"
 };
 
diff --git a/nsprpub/pr/tests/writev.c b/nsprpub/pr/tests/writev.c
index 7b761648f85c..f72f00fb44a1 100644
--- a/nsprpub/pr/tests/writev.c
+++ b/nsprpub/pr/tests/writev.c
@@ -15,7 +15,18 @@
 #define IOV_MAX 16
 #endif
 
-#define BASE_PORT 9867
+#ifdef DEBUG
+#define PORT_INC_DO +100
+#else
+#define PORT_INC_DO
+#endif
+#ifdef IS_64
+#define PORT_INC_3264 +200
+#else
+#define PORT_INC_3264
+#endif
+
+#define BASE_PORT 9867 PORT_INC_DO PORT_INC_3264
 
 int PR_CALLBACK Writev(int argc, char **argv)
 {
diff --git a/old-configure.in b/old-configure.in
index 2ac7fd92dfaa..59659092fa69 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -47,7 +47,7 @@ dnl Set the version number of the libs included with mozilla
 dnl ========================================================
 MOZPNG=10635
 NSPR_VERSION=4
-NSPR_MINVER=4.24
+NSPR_MINVER=4.25
 NSS_VERSION=3
 
 dnl Set the minimum version of toolkit libs used by mozilla