diff --git a/localtests/test.sh b/localtests/test.sh
index b78fa87..9ab0c18 100755
--- a/localtests/test.sh
+++ b/localtests/test.sh
@@ -86,7 +86,7 @@ test_single() {
   if [ -f $tests_path/$test_name/ignore_versions ] ; then
     ignore_versions=$(cat $tests_path/$test_name/ignore_versions)
     mysql_version=$(gh-ost-test-mysql-master -s -s -e "select @@version")
-    if echo "$mysql_version" | egrep "$ignore_versions" ; then
+    if echo "$mysql_version" | egrep "^${ignore_versions}" ; then
       echo "ignoring"
       return 0
     fi
diff --git a/localtests/tz-datetime-ts/ignore_versions b/localtests/tz-datetime-ts/ignore_versions
new file mode 100644
index 0000000..7acd3f0
--- /dev/null
+++ b/localtests/tz-datetime-ts/ignore_versions
@@ -0,0 +1 @@
+(5.5)
diff --git a/localtests/tz/ignore_versions b/localtests/tz/ignore_versions
new file mode 100644
index 0000000..7acd3f0
--- /dev/null
+++ b/localtests/tz/ignore_versions
@@ -0,0 +1 @@
+(5.5)
diff --git a/script/cibuild-gh-ost-replica-tests b/script/cibuild-gh-ost-replica-tests
index a1fa646..2e43009 100755
--- a/script/cibuild-gh-ost-replica-tests
+++ b/script/cibuild-gh-ost-replica-tests
@@ -49,6 +49,6 @@ test_mysql_version() {
 echo "Building..."
 . script/build
 # Test all versions:
-find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort -r | while read mysql_version ; do
+find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort | while read mysql_version ; do
   test_mysql_version "$mysql_version"
 done