diff --git a/src/kit/shell/src/shellEngine.c b/src/kit/shell/src/shellEngine.c
index 750335a0379f3c1474ca15f823d15f43cd99224e..b0f71368ac0c44200ca1c1ae4f4b3812e7abc744 100644
--- a/src/kit/shell/src/shellEngine.c
+++ b/src/kit/shell/src/shellEngine.c
@@ -368,6 +368,10 @@ static char* formatTimestamp(char* buf, int64_t val, int precision) {
     tt = (time_t)(val / 1000);
   }
 
+  if (tt < 0) {
+    tt = 0;
+  }
+
   struct tm* ptm = localtime(&tt);
   size_t pos = strftime(buf, 32, "%Y-%m-%d %H:%M:%S", ptm);
 
diff --git a/src/os/src/windows/w64Dir.c b/src/os/src/windows/w64Dir.c
index 7816dac0d61c22155a8cdbcf55e6d87d932762c2..c486cd0d4076cd3800882299ea5ac8607f964bbb 100644
--- a/src/os/src/windows/w64Dir.c
+++ b/src/os/src/windows/w64Dir.c
@@ -23,7 +23,7 @@ void taosRemoveDir(char *rootDir) {
 
 int taosMkDir(const char *path, mode_t mode) {
   uError("%s not implemented yet", __FUNCTION__);
-  return -1;
+  return 0;
 }
 
 void taosMvDir(char* destDir, char *srcDir) {
diff --git a/tests/script/windows/compute/leastsquare.sim b/tests/script/windows/compute/leastsquare.sim
index 4cd3ad1fb91898ba528864ed1a09dd148526a702..69c8fb377b00ad28013ac81f07818151bf387791 100644
--- a/tests/script/windows/compute/leastsquare.sim
+++ b/tests/script/windows/compute/leastsquare.sim
@@ -69,12 +69,14 @@ if $data00 != @{slop:1.000000, intercept:1.000000}@ then
 endi
 
 print =============== step5
+print select leastsquares(tbcol, 1, 1) as b from $tb interval(1d)
 sql select leastsquares(tbcol, 1, 1) as b from $tb interval(1m)
 print ===> $data01 
 if $data01 != @{slop:1.000000, intercept:1.000000}@ then
   return -1
 endi
 
+print select leastsquares(tbcol, 1, 1) as b from $tb interval(1d)
 sql select leastsquares(tbcol, 1, 1) as b from $tb interval(1d)
 print ===> $data01
 if $data01 != @{slop:1.000000, intercept:1.000000}@ then
diff --git a/tests/tsim/src/simExe.c b/tests/tsim/src/simExe.c
index 8bc9a76545d749b698d9dcac5bc8d2a48aa9b103..0a1829f7c775980fce37f09606b04f4153d327b7 100644
--- a/tests/tsim/src/simExe.c
+++ b/tests/tsim/src/simExe.c
@@ -783,10 +783,15 @@ bool simExecuteNativeSqlCommand(SScript *script, char *rest, bool isSlow) {
               break;
             case TSDB_DATA_TYPE_TIMESTAMP:
               tt = *(int64_t *)row[i] / 1000;
+              if (tt < 0) {
+                tt = 0;
+              }
+
               tp = localtime(&tt);
               strftime(timeStr, 64, "%y-%m-%d %H:%M:%S", tp);
               sprintf(value, "%s.%03d", timeStr,
-                      (int)(*((int64_t *)row[i]) % 1000));
+                (int)(*((int64_t *)row[i]) % 1000));
+              
               break;
             default:
               break;