diff --git a/test/run-builder.sh b/test/run-builder.sh
index 2b1fae0..6b53a18 100755
--- a/test/run-builder.sh
+++ b/test/run-builder.sh
@@ -2,7 +2,7 @@
 set -euo pipefail
 
 SHARE_DIR=${SHARE_DIR:-/tmp/osbuild-composer-koji-test}
-DATA_DIR=/var/tmp/osbuild-koji-data
+DATA_DIR=${DATA_DIR:-/var/tmp/osbuild-koji-data}
 
 # this script must be run as root
 if [ $UID != 0 ]; then
diff --git a/test/run-koji-container.sh b/test/run-koji-container.sh
index 00838b9..e864ba0 100755
--- a/test/run-koji-container.sh
+++ b/test/run-koji-container.sh
@@ -2,7 +2,7 @@
 set -eu
 
 SHARE_DIR=${SHARE_DIR:-/tmp/osbuild-composer-koji-test}
-DATA_DIR=/var/tmp/osbuild-koji-data
+DATA_DIR=${DATA_DIR:-/var/tmp/osbuild-koji-data}
 
 KOJI_HUB_IMAGE=koji.hub