diff --git a/test/travis_Dockerfile_slapd.centos b/test/travis_Dockerfile_slapd.centos
index 713e5de507..921927733d 100644
--- a/test/travis_Dockerfile_slapd.centos
+++ b/test/travis_Dockerfile_slapd.centos
@@ -1,5 +1,5 @@
 FROM quay.io/centos/centos:stream9
-RUN dnf install -y epel-release && \
-    dnf install -y openldap openldap-clients openldap-servers openldap-devel && \
-    dnf -y clean all --enablerepo='*'
+RUN rpm -q openldap-servers || (dnf install --refresh -y epel-release && \
+    dnf install --nobest -y openldap-clients openldap-servers openldap-devel && \
+    dnf -y clean all --enablerepo='*')
 CMD /usr/sbin/slapd -u ldap -d1 '-h ldap:// ldapi:///'