diff --git a/SPECS/rubygem-mysql2.spec b/SPECS/rubygem-mysql2.spec
index 6edadcd..3417450 100644
--- a/SPECS/rubygem-mysql2.spec
+++ b/SPECS/rubygem-mysql2.spec
@@ -97,9 +97,7 @@ pushd .%{gem_instdir}
 
 TOP_DIR=$(pwd)
 # Use testing port because the standard mysqld port 3306 is occupied.
-# Assign a random port to consider a case of multi builds in parallel in a host.
-# https://src.fedoraproject.org/rpms/rubygem-pg/pull-request/3
-MYSQL_TEST_PORT="$((13306 + ${RANDOM} % 1000))"
+MYSQL_TEST_PORT="13306"
 MYSQL_TEST_USER=$(id -un)
 MYSQL_TEST_DATA_DIR="${TOP_DIR}/data"
 MYSQL_TEST_SOCKET="${TOP_DIR}/mysql.sock"