diff --git a/stacks/mysql/build.sh b/stacks/mysql/build.sh
index 25e609b..71d4c82 100755
--- a/stacks/mysql/build.sh
+++ b/stacks/mysql/build.sh
@@ -76,6 +76,8 @@ function build() {
   strip  /opt/drycc/mysql/bin/perror
   strip  /opt/drycc/mysql/bin/zlib_decompress
 
+   # remove mysql test dir
+  rm -rf /opt/drycc/mysql/mysql-test 
   # copy mysql build files to data dir
   cp -r /opt/drycc/mysql/ ${DATA_DIR}/
 
@@ -84,4 +86,4 @@ function build() {
 }
 
 # call build stack
-build-stack "${1}"
\ No newline at end of file
+build-stack "${1}"