diff --git a/testing/start_test.sh b/testing/start_test.sh
index c529817..d9c0bc8 100755
--- a/testing/start_test.sh
+++ b/testing/start_test.sh
@@ -2,7 +2,7 @@
 # this script runs in the rpm_test environment
 
 # Install SCL on CentOS
-if grep -q 'ID="centos"' /etc/os-release; then
+if [ -f /etc/centos-release ] || grep -q 'ID="centos"' /etc/os-release; then
   sudo yum install -y centos-release-scl
 fi